ICD-10 Codes Explained
International Classification of Diseases codes for diagnoses and conditions. Understand what each diagnosis code means on your medical bills.
Showing 50 of 488 ICD-10 codes
D3131Non-cancerous growth in the right choroid (blood vessel layer of the eye)
This code indicates a benign (non-cancerous) tumor or growth in the choroid of your right eye. The choroid is a layer of blood vessels located between the retina (the light-sensitive layer at the back of your eye) and the sclera (the white outer wall of your eye). This layer helps nourish the retina and maintain eye health. A benign neoplasm means the growth is not cancerous and typically does not spread to other parts of the body. However, depending on its size and location, it may still require monitoring or treatment to prevent vision problems or other complications.
Z3A01Documentation of early pregnancy (less than 8 weeks)
This code indicates that you are in the very early stages of pregnancy, specifically less than 8 weeks from your last menstrual period. This is used by healthcare providers to document the gestational age of your pregnancy for medical record keeping and billing purposes. At this stage, the pregnancy is still in its first trimester, and this coding helps ensure you receive appropriate prenatal care and monitoring. The code is often used alongside blood tests that check pregnancy hormones or other pregnancy-related lab work.
R194Change in normal bowel movement patterns
This code indicates that you've experienced a change in your usual bowel movement patterns. This could mean changes in frequency (going more or less often than normal), consistency (harder, softer, or different texture), color, or other characteristics of your bowel movements. Changes in bowel habits can have many causes, ranging from dietary changes, stress, medications, or underlying medical conditions. Your healthcare provider will evaluate these changes to determine if further testing or treatment is needed.
R1314Difficulty swallowing that occurs when food or liquid gets stuck in the throat or upper esophagus area
Dysphagia in the pharyngoesophageal phase means you have trouble swallowing that happens when food or liquid moves from your throat into your esophagus (the tube that carries food to your stomach). This can feel like food getting stuck in your throat or upper chest area. It may cause coughing, choking, or the sensation that food won't go down properly. This condition can make eating and drinking difficult and may require evaluation to determine the underlying cause and appropriate treatment.
M9908Segmental and somatic dysfunction of the rib cage
This code describes a condition where there is abnormal movement or positioning of the ribs and related muscles, joints, or connective tissues in the chest area. Segmental and somatic dysfunction refers to problems with how the spine segments and body structures move and function together. In the rib cage area, this can cause restricted movement, muscle tension, or misalignment that may lead to pain, stiffness, or breathing difficulties. This condition is commonly treated with chiropractic care or osteopathic manipulative treatment to restore normal movement and function.
H8110Benign paroxysmal vertigo (brief episodes of dizziness) affecting an unspecified ear
This code represents benign paroxysmal vertigo, which is a condition causing brief episodes of spinning dizziness (vertigo). The episodes are typically triggered by specific head movements and are considered 'benign' because they are not life-threatening. 'Paroxysmal' means the symptoms come in sudden attacks or episodes. In this case, the specific ear affected (left or right) is not specified in the medical documentation.
U071COVID-19 diagnosis code
This is the official medical code used to document a COVID-19 diagnosis. U071 specifically indicates that you have been diagnosed with COVID-19, the disease caused by the SARS-CoV-2 virus. This code is used by healthcare providers for medical record keeping, insurance billing, and public health tracking purposes. The diagnosis may be based on laboratory testing (such as PCR or antigen tests), clinical symptoms, or epidemiological factors as determined by your healthcare provider.
M359A condition affecting connective tissues throughout the body, but the specific type hasn't been determined yet
This code indicates that you have a condition that affects your connective tissues - the supportive structures that hold your body together, including tendons, ligaments, cartilage, and the framework around organs. The 'systemic' part means it affects multiple areas of your body rather than just one spot. The 'unspecified' part means your doctor knows there's a connective tissue problem but hasn't yet determined exactly which specific condition it is. This might be used while you're undergoing testing to get a more precise diagnosis, or when your symptoms don't clearly fit into one specific connective tissue disease category. Connective tissue disorders can cause symptoms like joint pain, muscle weakness, skin changes, or fatigue.
N3001Sudden bladder infection with blood in urine
Acute cystitis with hematuria is a sudden inflammation or infection of the bladder that causes blood to appear in the urine. This condition typically develops quickly and causes symptoms like painful urination, frequent urination, urgency to urinate, and visible blood in the urine (which may appear pink, red, or cola-colored). The blood in urine (hematuria) distinguishes this from regular bladder infections. This condition is usually caused by bacterial infection, though other factors like irritation or inflammation can contribute. While concerning due to the blood in urine, it's generally treatable with appropriate medical care.
F411Diagnosis of generalized anxiety disorder during a new patient office visit
This code indicates that during your first visit to this healthcare provider, you were diagnosed with generalized anxiety disorder (GAD). GAD is a mental health condition characterized by persistent, excessive worry about various aspects of daily life that is difficult to control. People with GAD often experience physical symptoms like restlessness, fatigue, difficulty concentrating, muscle tension, and sleep problems. The anxiety is typically present more days than not for at least 6 months and significantly interferes with daily activities. This diagnosis was made during an office consultation with a mental health professional or primary care physician who evaluated your symptoms and determined they meet the criteria for GAD.
M3505Drug-induced muscle weakness affecting the shoulder area
This code indicates muscle weakness in the shoulder region that has been caused by medications or drugs. This condition occurs when certain medications interfere with normal muscle function, leading to weakness, fatigue, or reduced strength in the shoulder muscles. The weakness may affect your ability to lift your arms, carry objects, or perform daily activities involving shoulder movement. This is typically a side effect of medication rather than a primary muscle disease, and symptoms may improve when the causative medication is adjusted or discontinued under medical supervision.
G90AIdiopathic peripheral autonomic neuropathy - nerve damage affecting automatic body functions
This code refers to a condition where the peripheral autonomic nervous system is damaged, but the cause is unknown (idiopathic). The autonomic nervous system controls automatic body functions like heart rate, blood pressure, digestion, and temperature regulation. When these nerves are damaged, it can affect how your body automatically manages these vital functions. Symptoms might include problems with blood pressure regulation (especially when standing up), digestive issues, temperature control problems, or heart rate irregularities. Since it's 'idiopathic,' doctors haven't been able to identify a specific underlying cause for the nerve damage.
F419General anxiety disorder diagnosis when the specific type of anxiety isn't determined
This code indicates you have been diagnosed with an anxiety disorder, but your healthcare provider hasn't specified the exact type (such as generalized anxiety disorder, panic disorder, or social anxiety). Anxiety disorders involve excessive worry, fear, or nervousness that interferes with daily activities. This 'unspecified' diagnosis is often used when you're first being evaluated for anxiety symptoms, or when your symptoms don't clearly fit into a specific anxiety disorder category. It's a legitimate medical condition that can be effectively treated with therapy, medication, or both.
D1803A benign (non-cancerous) blood vessel tumor located inside the abdomen
A hemangioma is a benign tumor made up of blood vessels that appears as a cluster of abnormal blood vessels. When located in intra-abdominal structures, it means the hemangioma is found within organs inside the abdomen, such as the liver, spleen, or other abdominal organs. These are typically non-cancerous growths that are often present from birth or develop early in life. Most hemangiomas are harmless and may not cause symptoms, though larger ones might cause discomfort or complications depending on their size and location. The MRI/MRA imaging mentioned in your procedure helps doctors see the blood vessel structure clearly and determine the best treatment approach if needed.
S2242XDFollow-up visit for multiple broken ribs on the left side that are healing normally
This code is used for subsequent encounters (follow-up visits) when a patient previously suffered multiple fractures (breaks) of the ribs on the left side, and the fractures are now healing as expected without complications. This is not for the initial treatment of the injury, but rather for routine follow-up care to monitor the healing process.
G4700Difficulty falling asleep, staying asleep, or poor sleep quality without a specific underlying cause identified
This code indicates that you have been diagnosed with insomnia, which means you're experiencing problems with your sleep. This could include trouble falling asleep when you go to bed, waking up frequently during the night, waking up too early and not being able to get back to sleep, or feeling like your sleep isn't refreshing. The 'unspecified' part means that your healthcare provider hasn't identified a specific underlying medical condition or cause for your sleep problems. Insomnia can affect your daily life, making you feel tired, irritable, or have difficulty concentrating during the day. This diagnosis helps your healthcare team understand your sleep issues and develop an appropriate treatment plan.
F329Major depression, first episode, severity not specified
This code indicates a diagnosis of major depressive disorder during your first episode of depression. Major depressive disorder is a serious mental health condition characterized by persistent feelings of sadness, hopelessness, and loss of interest in activities you once enjoyed. This is considered a 'single episode' because it's either your first time experiencing major depression or you've had significant periods of normal mood between any previous episodes. The 'unspecified' part means your healthcare provider hasn't documented the specific severity level (mild, moderate, or severe) of your current depression. This diagnosis typically requires symptoms to be present for at least two weeks and to significantly impact your daily functioning, work, or relationships.
T1511XAForeign object stuck in the conjunctival sac of the right eye, initial visit
This code indicates that a foreign object (such as dust, debris, an eyelash, or other small particle) has become lodged in the conjunctival sac of the right eye. The conjunctival sac is the space between the eyelid and the eyeball, lined by a thin membrane called the conjunctiva. This is coded as an initial encounter, meaning it's the first time this specific injury is being treated by a healthcare provider.
N6310A lump or mass found in the right breast that needs further evaluation to determine what it is
This code indicates that a healthcare provider has identified a lump or mass in your right breast, but they haven't yet determined exactly what type of lump it is or its specific location within the breast. The lump could be many different things - it might be a cyst (fluid-filled sac), a benign (non-cancerous) growth like a fibroadenoma, or it could require further testing to rule out other conditions. This is a diagnostic code used when additional testing or evaluation is needed to better understand the nature of the lump. It's important to note that most breast lumps are benign, but proper medical evaluation is essential to determine the exact nature of any breast abnormality.
Z789Documentation of a specific health condition or status that affects your care
This code is used by healthcare providers to document a particular health status, condition, or circumstance that is important for your medical care but doesn't fit into other standard diagnostic categories. It's often used to record factors that influence your health or treatment decisions, such as specific risk factors, health maintenance needs, or other medically relevant circumstances. This code helps ensure your complete health picture is documented for proper care coordination and medical decision-making.
M25511Right shoulder pain diagnosis
This code indicates that you have been diagnosed with pain in your right shoulder. Shoulder pain can have many causes, including muscle strain, joint inflammation, injury, or wear and tear from daily activities. Your healthcare provider has documented this pain as the reason for your visit or as part of your medical condition. This is a common diagnosis that can range from mild discomfort to more significant pain that affects your daily activities and movement.
D72819Low white blood cell count of unknown cause
This code indicates that your white blood cell count is lower than normal, but the specific cause hasn't been identified yet. White blood cells are part of your immune system that help fight infections and diseases. When the count is low (a condition called leukopenia), your body may have a harder time fighting off infections. This could be due to various reasons including medications, infections, autoimmune conditions, bone marrow problems, or other medical conditions. Your healthcare team will likely need to do additional tests to determine the underlying cause and develop an appropriate treatment plan.
N182Chronic kidney disease, stage 2 - mild decrease in kidney function
Stage 2 chronic kidney disease means your kidneys have mild damage and are working at 60-89% of normal function. At this stage, you may not have any symptoms, but your doctor has detected signs of kidney damage through blood tests, urine tests, or imaging studies. Your kidneys are still functioning well enough to filter waste from your blood, but early intervention can help slow progression and protect your remaining kidney function. This stage often requires monitoring and lifestyle changes to prevent further kidney damage.
R502Fever caused by medication or drug reaction
This code indicates that you developed a fever as a side effect or reaction to a medication or drug you were taking. Drug-induced fever is when your body temperature rises above normal (usually above 100.4°F or 38°C) specifically because of a medication, rather than from an infection or other illness. This can happen with many different types of medications, including antibiotics, heart medications, seizure medications, and others. The fever typically goes away once the medication is stopped or changed. Your healthcare team will monitor your temperature and may need to adjust or discontinue the medication causing the fever.
Z043Medical visit for examination and observation after an accident (not transport-related)
This code is used when you visit a healthcare provider for examination and observation following an accident that was not related to transportation (such as a car, motorcycle, or bicycle accident). This includes accidents like falls, sports injuries, workplace incidents, or other non-transport accidents. The visit is specifically for monitoring and evaluating your condition after the accident occurred, even if no immediate injury was apparent.
Z792Currently taking antibiotics for an extended period of time
This code indicates that you are currently taking antibiotic medications for a long period of time (typically 30 days or more). This is not a diagnosis of an illness, but rather a way for healthcare providers to document that you're on long-term antibiotic treatment. This might be necessary for various reasons, such as treating a chronic infection, preventing infections in certain medical conditions, or as part of ongoing treatment for specific health issues. Your healthcare team uses this code to keep track of your medication history and ensure proper coordination of your care.
S0990XAHead injury of unknown type - first visit for treatment
This code indicates that you have sustained some type of injury to your head, but the specific nature or extent of the injury has not yet been determined or documented. This is your first visit to receive medical care for this head injury. The injury could range from minor bumps or bruises to more serious conditions, which is why further evaluation and testing may be needed to determine the exact type and severity of your head injury.
I341Mitral valve prolapse not caused by rheumatic heart disease
This code indicates a condition where the mitral valve (one of the heart's four valves) doesn't close properly, causing the valve leaflets to bulge back into the left atrium during heartbeats. This specific code applies when the prolapse is not caused by rheumatic heart disease, which means it's typically a structural abnormality that can be congenital (present from birth) or develop over time. Many people with mitral valve prolapse have no symptoms, while others may experience chest pain, palpitations, or fatigue.
K648Other types of hemorrhoids not specifically classified elsewhere
This code refers to hemorrhoids (swollen blood vessels in the rectum or anus) that don't fit into the more specific hemorrhoid categories. Hemorrhoids are very common and can cause symptoms like pain, itching, bleeding, or discomfort during bowel movements. They can be internal (inside the rectum) or external (around the anus). This particular code is used when the hemorrhoids don't match the criteria for other specific hemorrhoid diagnoses, but still require medical attention or treatment.
H6982A specific disorder affecting the eustachian tube in the left ear that doesn't fit into other standard categories
This code refers to a particular problem with your left eustachian tube that has specific characteristics but doesn't match the typical categories of eustachian tube disorders. The eustachian tube is a small passage that connects your middle ear to the back of your throat and helps equalize air pressure in your ear. When this tube isn't working properly, you might experience symptoms like ear fullness, muffled hearing, ear pain, or difficulty with pressure changes (like when flying or driving in mountains). The 'other specified' designation means your doctor has identified a specific type of eustachian tube problem that requires its own distinct classification for proper treatment and medical record keeping.
K2950Chronic stomach inflammation without bleeding, type not specified
This code indicates you have chronic gastritis, which means the lining of your stomach has been inflamed (irritated and swollen) for an extended period of time. 'Chronic' means it's been going on for weeks, months, or longer, rather than being a sudden, short-term problem. The 'unspecified' part means your doctor hasn't identified the exact type or cause of the gastritis yet. The good news is that there's no bleeding detected, which means the inflammation hasn't caused any bleeding in your stomach lining. Common symptoms might include stomach pain, nausea, bloating, or feeling full quickly when eating. This condition can often be managed with medication and dietary changes.
M25572Pain in left ankle and joints of left foot
This code represents pain affecting the left ankle and the joints in the left foot. It is used to document when a patient experiences discomfort, aching, or pain specifically in these areas of the left lower extremity. The pain may involve the ankle joint itself as well as the various small joints within the left foot, such as those connecting the toes, midfoot, and other foot structures.
E7219Other rare disorders affecting how the body processes sulfur-containing amino acids
This code represents uncommon genetic conditions that affect how your body breaks down and uses certain amino acids (protein building blocks) that contain sulfur. These are typically inherited disorders where specific enzymes needed for normal amino acid metabolism don't work properly. This is a 'catch-all' code used when the specific disorder doesn't fit into other more defined categories of sulfur amino acid metabolism disorders.
I517Enlarged heart (cardiomegaly)
Cardiomegaly means your heart is larger than normal size. This enlargement can affect the heart's ability to pump blood effectively. It can be caused by various conditions such as high blood pressure, heart valve problems, heart muscle disease, or other underlying health issues. The enlarged heart may be detected through chest X-rays, echocardiograms, or other imaging tests.
S9002XABruising of the left ankle - first visit for this injury
This code represents a contusion (bruise) of the left ankle during the initial encounter with a healthcare provider for this specific injury. A contusion occurs when small blood vessels under the skin are damaged from impact or trauma, causing bleeding under the skin that appears as bruising, swelling, and discoloration. The 'initial encounter' designation means this is the first time you're receiving medical care for this particular ankle injury.
J8410Scarring of lung tissue that makes breathing difficult
Pulmonary fibrosis is a condition where the lung tissue becomes thick and scarred over time. This scarring makes it harder for your lungs to work properly and can cause shortness of breath, especially during physical activity. The 'unspecified' part means the exact cause or type of fibrosis hasn't been determined yet. This condition can develop from various causes including certain medications, environmental exposures, autoimmune diseases, or sometimes the cause is unknown. The scarring is usually permanent, but treatments can help slow progression and manage symptoms.
H2513Age-related clouding of the natural lens in both eyes (cataracts)
This code indicates that you have cataracts in both eyes. Cataracts occur when the natural lens inside your eye becomes cloudy, making your vision blurry or dim. The 'nuclear' type means the cloudiness is in the center part of the lens. This is a very common condition that develops naturally as we age, typically affecting people over 60. The cloudiness blocks light from reaching the back of your eye clearly, which is why you may notice difficulty seeing, especially at night, increased glare from lights, or colors appearing faded. This is not an emergency condition and develops gradually over time.
D500Iron deficiency anemia caused by ongoing blood loss over time
This condition means you have anemia (low red blood cell count) because your body doesn't have enough iron. The iron deficiency happened because you've been losing small amounts of blood over a long period of time, which gradually depleted your body's iron stores. This type of blood loss is often so slow that you might not notice it happening. Common causes include heavy menstrual periods, bleeding in the digestive tract from ulcers or other conditions, or frequent blood donations. Your body needs iron to make healthy red blood cells, so when iron levels get too low, you develop anemia, which can make you feel tired, weak, or short of breath.
H5789Other hearing loss in both ears
This code indicates that you have hearing loss affecting both of your ears, but it's a type that doesn't fit into the more specific categories of hearing loss that doctors typically diagnose. This could include mixed hearing loss (combination of different types), hearing loss from multiple causes, or other less common forms of hearing impairment. The hearing loss may range from mild to severe and can affect your ability to hear conversations, sounds in your environment, or specific frequencies of sound.
R202Abnormal skin sensations like tingling, numbness, or 'pins and needles'
Paresthesia refers to unusual sensations in your skin that you might describe as tingling, numbness, burning, prickling, or feeling like 'pins and needles.' These sensations can occur anywhere on your body and may feel like your skin is crawling, itching without a rash, or like parts of your body have 'fallen asleep.' This condition can be temporary (like when your foot falls asleep) or ongoing, and can result from various causes including nerve irritation, vitamin deficiencies, medication side effects, or underlying medical conditions. The sensations are real and not imaginary, though there may not be any visible changes to your skin.
E042Non-cancerous enlarged thyroid gland with multiple lumps or nodules
This code refers to a condition where your thyroid gland (located in your neck) has become enlarged and contains multiple small lumps called nodules. The 'nontoxic' part means these nodules are not producing excess thyroid hormones, so your thyroid function remains normal. 'Multinodular' means there are several nodules present rather than just one. A goiter simply means an enlarged thyroid gland. This condition is generally benign (non-cancerous) but may cause visible swelling in the neck or, in some cases, difficulty swallowing or breathing if the goiter becomes very large. The nodules are typically discovered through physical examination or imaging studies like ultrasound.
T50Z95AInitial treatment for an adverse reaction to a vaccine or biological medicine
This code indicates that you experienced an unwanted side effect or adverse reaction to a vaccine or biological medication, and this is your first visit for treatment of that reaction. Biological substances include vaccines, blood products, and certain medications derived from living organisms. Adverse effects can range from mild reactions like soreness at the injection site to more serious allergic reactions. The 'initial encounter' designation means this is the first time you're receiving medical care specifically for this reaction. Your healthcare team will evaluate your symptoms, provide appropriate treatment, and monitor your recovery.
M79645Pain in left finger(s)
This code indicates pain specifically located in one or more fingers of the left hand. The pain may be acute (sudden onset) or chronic (long-lasting), and can range from mild discomfort to severe pain. This code is used when the exact cause of the finger pain has not been determined or when the pain is the primary symptom being addressed. The pain could affect any finger on the left hand, including the thumb, and may involve joints, muscles, tendons, or other soft tissues within the finger(s).
H16141Small spots of inflammation on the clear front part of the right eye
Punctate keratitis is a condition where small, dot-like areas of inflammation develop on the cornea (the clear, dome-shaped front surface of your right eye). These tiny spots can cause symptoms like eye pain, sensitivity to light, tearing, and blurred vision. The condition can be caused by various factors including dry eyes, infections (viral, bacterial, or fungal), allergies, contact lens problems, or exposure to irritants. While it sounds concerning, punctate keratitis is often treatable and many cases resolve with proper care.
R519Headache, unspecified type
This code indicates you experienced a headache, but the specific type or cause wasn't determined or documented during your visit. Headaches are very common and can have many different causes, ranging from stress, dehydration, or lack of sleep to more specific medical conditions. Since this is coded as 'unspecified,' it means your healthcare provider documented that you had head pain but didn't identify it as a particular type of headache (like migraine, tension headache, or cluster headache). This could be because it was a one-time occurrence, the pattern wasn't clear yet, or additional evaluation might be needed to determine the specific type.
D6851A blood clotting disorder that increases the risk of developing blood clots
Activated Protein C Resistance is a genetic condition where your blood doesn't respond properly to a natural protein (Protein C) that helps prevent blood clots. This means your blood has a higher tendency to form clots than normal. The most common cause is a genetic variation called Factor V Leiden. People with this condition have an increased risk of developing blood clots in their veins, particularly in the legs (deep vein thrombosis) or lungs (pulmonary embolism). The condition is usually discovered through blood tests, often after someone has had a blood clot or during screening if there's a family history of clotting disorders.
R300Painful or difficult urination
Dysuria is the medical term for experiencing pain, burning, stinging, or discomfort when urinating. This symptom can affect anyone and may feel like a burning sensation, sharp pain, or general discomfort during urination. It's often described as feeling like 'fire' when passing urine. Dysuria is a symptom rather than a disease itself, and can be caused by various conditions including urinary tract infections, bladder infections, kidney stones, sexually transmitted infections, or irritation from soaps, perfumes, or certain medications. While uncomfortable, it's usually treatable once the underlying cause is identified.
J0141Acute recurrent pansinusitis - repeated episodes of sudden inflammation in all sinus cavities
This code represents acute recurrent pansinusitis, which means you have experienced repeated episodes of sudden, severe inflammation affecting all of your sinus cavities (the air-filled spaces around your nose, cheeks, and forehead). 'Acute' means the symptoms come on suddenly and are severe, 'recurrent' means this has happened multiple times, and 'pansinusitis' means all of your sinus cavities are involved. This condition typically causes symptoms like facial pain and pressure, thick nasal discharge, congestion, reduced sense of smell, and sometimes fever. The recurrent nature suggests this is an ongoing problem that keeps coming back rather than a single episode.
H9392Unspecified problem with the left ear
This code indicates that you have some type of disorder or problem affecting your left ear, but the specific condition hasn't been identified or documented in detail yet. This is often used when you're experiencing ear-related symptoms like pain, hearing changes, discharge, or discomfort, but further examination or testing is needed to determine the exact cause. It's a general code that doctors use when they know something is wrong with your left ear but need more information to make a specific diagnosis.
F17210Nicotine addiction from cigarette smoking without other complications
This code indicates that you have been diagnosed with nicotine dependence specifically from cigarette smoking. Nicotine dependence means your body has become physically and psychologically dependent on nicotine, making it difficult to quit smoking without experiencing withdrawal symptoms. The 'uncomplicated' part means that at this time, there are no additional smoking-related health problems or complications documented alongside the addiction itself. This diagnosis is often used when healthcare providers are documenting smoking cessation efforts, prescribing quit-smoking medications, or referring patients to smoking cessation programs.
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