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 452 ICD-10 codes
K7460Liver cirrhosis of unspecified type
This code indicates cirrhosis of the liver where the specific type or cause has not been identified or documented. Cirrhosis is a condition where healthy liver tissue is gradually replaced by scar tissue, which can interfere with the liver's ability to function properly. The liver becomes hardened and may not work as well as it should. This particular code is used when the medical documentation doesn't specify what caused the cirrhosis or what specific type it is.
R052Subacute cough - a cough that has persisted for several weeks
This code represents a subacute cough, which is a cough that typically lasts between 3-8 weeks. It's longer than an acute cough (which lasts less than 3 weeks) but shorter than a chronic cough (which lasts more than 8 weeks). This type of cough often occurs after respiratory infections or other conditions and may take time to resolve completely. The code falls under the category of symptoms and signs that are documented when the underlying cause may not yet be determined or when the cough itself is the primary concern being addressed.
Z800Family history of cancer in digestive organs
This code indicates that you have a family history of malignant cancer (malignant neoplasm) affecting digestive organs such as the stomach, intestines, colon, liver, pancreas, or other parts of the digestive system. This code is used to document important family medical history that may influence your healthcare screening, prevention strategies, and risk assessment. Having this family history doesn't mean you will develop cancer, but it may mean your doctor recommends earlier or more frequent screening tests.
Z1231Screening mammogram appointment for breast cancer detection
This code represents a routine screening mammogram visit specifically for detecting breast cancer in patients without symptoms. This is a preventive healthcare service used to identify potential breast cancer early, before any signs or symptoms appear. The screening is performed on patients who do not currently have breast problems or symptoms.
I480Paroxysmal atrial fibrillation - irregular heartbeat that comes and goes
Paroxysmal atrial fibrillation is a type of irregular heart rhythm where the upper chambers of your heart (atria) beat irregularly and often rapidly. 'Paroxysmal' means this irregular heartbeat comes and goes - it starts suddenly, lasts for a period of time (usually less than 7 days), and then stops on its own, returning to normal rhythm. During episodes, you may feel your heart racing, fluttering, or skipping beats, and you might experience symptoms like shortness of breath, chest discomfort, or fatigue.
N138Other obstructive and reflux uropathy - blockage or backup of urine in the urinary system
This code represents a condition where there is obstruction (blockage) or reflux (backward flow) of urine somewhere in the urinary system that doesn't fit into other specific categories. This can affect the kidneys, ureters (tubes that carry urine from kidneys to bladder), or other parts of the urinary tract. The obstruction or reflux can prevent normal urine flow, potentially leading to kidney problems if not treated. This is a 'catch-all' code used when the specific type of urinary obstruction or reflux doesn't match other more specific diagnostic codes.
I77810Widening or enlargement of the thoracic aorta (the main artery in the chest)
This code represents thoracic aortic ectasia, which is a condition where the thoracic aorta (the large main artery that carries blood from the heart through the chest) becomes widened or enlarged beyond its normal diameter. The thoracic aorta is the portion of the aorta located in the chest cavity. Ectasia refers to the abnormal stretching or dilation of a blood vessel. This condition falls under diseases of the circulatory system and specifically affects arteries and arterioles.
Z6830Body Mass Index (BMI) between 30.0-30.9 in adults
This code indicates that your Body Mass Index (BMI) falls between 30.0 and 30.9. BMI is a measurement that uses your height and weight to determine if you're in a healthy weight range. A BMI in this range (30.0-30.9) is classified as obesity class I according to medical standards. This is a diagnostic code used to document your current BMI status for medical record keeping and may be relevant for health monitoring, treatment planning, or insurance purposes.
H2512Age-related clouding of the lens in the left eye (nuclear cataract)
This code represents an age-related nuclear cataract specifically in the left eye. A nuclear cataract is a type of clouding that occurs in the central part (nucleus) of the eye's natural lens. This condition typically develops as part of the normal aging process, causing the lens to become less transparent and potentially affecting vision. The 'nuclear' type refers to the specific location where the clouding occurs - in the center of the lens rather than other areas like the edges or back surface.
I444A delay in electrical signals in the left side of the heart's conduction system
Left anterior fascicular block is a condition where there is a delay or blockage in the electrical signals that control your heartbeat, specifically in the left anterior fascicle (a branch of the heart's electrical pathway). This affects how electrical impulses travel through the left ventricle of your heart. It's often detected on an electrocardiogram (ECG) and may occur alone or alongside other heart conditions. Many people with this condition have no symptoms and may not require treatment.
Z87891Personal history of nicotine dependence (past tobacco addiction)
This code indicates that you previously had nicotine dependence (addiction to tobacco products like cigarettes, cigars, or chewing tobacco) but are no longer currently dependent. It's used to document your medical history of tobacco addiction, which can be important for healthcare providers to know when assessing your current health risks and providing appropriate care. This code applies whether you quit on your own, used cessation aids, or received treatment to overcome the addiction.
I119High blood pressure affecting the heart without heart failure
This code represents hypertensive heart disease without heart failure. This means you have high blood pressure (hypertension) that has affected your heart muscle or structure, but your heart is still pumping effectively and you do not have heart failure. The condition occurs when chronic high blood pressure causes changes to the heart, such as thickening of the heart muscle, but the heart's ability to pump blood remains adequate.
T783XXASevere allergic swelling of face, lips, throat, or other body parts - first visit for this condition
Angioneurotic edema, also called angioedema, is a type of allergic reaction that causes deep swelling in the skin and mucous membranes, most commonly affecting the face, lips, eyelids, tongue, and throat. This swelling occurs beneath the surface of the skin and can develop rapidly. The 'initial encounter' designation means this is the first time you're receiving medical care for this particular episode of angioedema. This condition can be caused by allergic reactions to foods, medications, or other substances, and may require immediate medical attention especially if it affects breathing or swallowing.
Z8673Personal history of stroke or mini-stroke (TIA) with no lasting effects
This code indicates that you have a documented medical history of either a transient ischemic attack (TIA, also called a 'mini-stroke') or a cerebral infarction (stroke), but you have recovered without any permanent neurological problems or lasting deficits. A TIA is a temporary blockage of blood flow to part of the brain that typically resolves within minutes to hours. A cerebral infarction is a stroke caused by blocked blood flow to the brain. This code is used when these events occurred in your past but did not leave you with ongoing symptoms or disabilities.
R922Mammogram results that could not provide a clear or definitive finding
This code indicates that a mammogram (breast X-ray screening) was performed but the results were inconclusive, meaning the radiologist could not make a clear determination from the images. This could be due to various factors such as dense breast tissue, technical issues with the imaging, patient movement, or unclear areas that need further evaluation. An inconclusive mammogram does not mean there is a problem - it simply means additional imaging or follow-up may be needed to get clearer results.
Z6821Body Mass Index (BMI) between 21.0 and 21.9 in an adult
This code indicates that your Body Mass Index (BMI) falls within the range of 21.0 to 21.9. BMI is a measurement that uses your height and weight to assess whether you're in a healthy weight range. A BMI in this range is considered within the normal, healthy weight category for adults. This is typically used for documentation purposes in medical records when BMI is relevant to your care or treatment planning.
R09A2Foreign body sensation in the throat
This code represents the feeling that there is something stuck in your throat, even when there may not actually be a foreign object present. This sensation can feel like a lump, something caught, or an obstruction in the throat area. It's a symptom that patients describe when they have the uncomfortable feeling that something is lodged in their throat, which may interfere with swallowing or cause discomfort.
Z9841History of cataract surgery on the right eye
This code indicates that you have previously had cataract extraction surgery performed on your right eye. A cataract is a clouding of the natural lens in your eye that can cause blurry vision. Cataract extraction is a common surgical procedure where the cloudy lens is removed and typically replaced with an artificial lens implant. This code is used in medical records to document that this surgery has been completed on your right eye, which is important information for future eye care and medical treatments.
I081Rheumatic disorders affecting both mitral and tricuspid heart valves
This code represents a condition where rheumatic disease has damaged both the mitral valve and tricuspid valve of the heart. Rheumatic heart disease is typically caused by rheumatic fever, which can occur after untreated strep throat infections. When both the mitral valve (located between the left atrium and left ventricle) and tricuspid valve (located between the right atrium and right ventricle) are affected, it means the rheumatic process has caused structural changes or dysfunction in both of these important heart valves that control blood flow through the heart.
E041A single, non-cancerous lump or growth in the thyroid gland that does not produce excess hormones
This code represents a single nodule (lump or growth) found in the thyroid gland that is nontoxic, meaning it does not produce excessive amounts of thyroid hormones. The thyroid is a butterfly-shaped gland in your neck that helps regulate metabolism. A single nodule means there is one distinct lump rather than multiple nodules. Most thyroid nodules are benign (non-cancerous) and may not cause symptoms, though they can sometimes be felt as a lump in the neck or seen on imaging studies.
Z803Family history of breast cancer
This code indicates that you have a family history of breast cancer, meaning one or more of your blood relatives (such as mother, sister, grandmother, or aunt) has been diagnosed with breast cancer. This information is important for your healthcare providers because having a family history of breast cancer may increase your own risk of developing the disease. Your doctor uses this code to document this family history in your medical records, which helps guide screening recommendations and preventive care decisions. This is not a diagnosis of cancer for you - it's simply documenting your family medical history.
R920Small calcium deposits found on breast imaging
This code indicates that tiny calcium deposits called microcalcifications were detected during diagnostic breast imaging (such as mammography). Microcalcifications are small white spots that show up on mammograms and are made of calcium. While most microcalcifications are benign (not cancerous), their pattern, shape, and distribution help doctors determine if further evaluation is needed. This is a diagnostic finding code used to document what was seen on the imaging study.
N6021Benign breast condition with fibrous tissue and cyst formation in the right breast
Fibroadenosis is a benign (non-cancerous) breast condition characterized by the development of fibrous tissue and small cysts in the breast. This specific code indicates the condition affects the right breast. It's also known as fibrocystic breast disease or fibrocystic changes. The condition can cause breast tenderness, lumpiness, or pain, particularly before menstrual periods. While benign, it may require monitoring and can sometimes make breast cancer screening more challenging.
N6091Non-cancerous breast tissue changes in the right breast
This code indicates benign (non-cancerous) mammary dysplasia in your right breast. Mammary dysplasia refers to changes in breast tissue that can cause lumps, thickening, or other texture changes. These changes are benign, meaning they are not cancerous and do not increase your risk of breast cancer. The term 'unspecified' means the exact type or nature of the tissue changes wasn't detailed in your medical record, but they have been confirmed as non-harmful. This condition is relatively common and can cause breast tenderness, especially during menstrual cycles. While not dangerous, your doctor may recommend monitoring or follow-up care to track any changes over time.
R928Unusual or unclear findings on breast imaging (like mammogram, ultrasound, or MRI)
This code is used when breast imaging tests (such as mammograms, ultrasounds, or MRIs) show findings that are abnormal but don't clearly point to a specific diagnosis. The results may be inconclusive, meaning doctors need more information or additional tests to determine what the findings mean. This doesn't necessarily indicate cancer or a serious condition - it simply means the imaging showed something that requires further evaluation or monitoring to understand better.
L308Other specified skin inflammation (dermatitis) not classified elsewhere
This code represents a type of skin inflammation or irritation (dermatitis) that has been specifically identified by your healthcare provider but doesn't fit into the more common categories of dermatitis that have their own specific codes. Dermatitis generally involves red, swollen, and itchy skin that may also have blisters, crusting, or scaling. This particular code is used when the dermatitis has specific characteristics that your doctor can identify, but it's not one of the more common types like eczema, contact dermatitis, or seborrheic dermatitis.
J984Other specified lung disorders not classified elsewhere
This code is used for lung conditions that don't fit into other specific categories in the medical coding system. It covers various lung disorders that have been diagnosed but don't match the criteria for more specific lung condition codes. Your doctor would use this code when you have a confirmed lung problem that doesn't fall under common categories like pneumonia, asthma, or COPD.
D1801A benign (non-cancerous) blood vessel growth in the skin or tissue just under the skin
A hemangioma is a common, non-cancerous growth made up of blood vessels that appears as a red or purple mark on the skin or in the tissue just beneath the skin surface. These growths are typically harmless and may appear as raised, flat, or slightly bumpy areas. They can vary in size and may be present at birth or develop later. While they are benign tumors, they should be evaluated by a healthcare provider to confirm the diagnosis and determine if any treatment is needed.
M79675Pain in the left toe or toes
This code specifically identifies pain located in one or more toes on the left foot. It is used when a patient experiences discomfort, aching, or pain in their left toe(s) without specifying the underlying cause. The pain could be related to various conditions such as injury, inflammation, nerve issues, or other medical problems affecting the toes.
R197Diarrhea without a specific underlying cause identified
This code is used when a patient has diarrhea (loose, watery stools occurring more frequently than normal) but the healthcare provider has not identified or specified the exact cause. Diarrhea can result from many different factors including infections, medications, dietary issues, or underlying medical conditions. This code indicates that while diarrhea is present and documented, additional testing or evaluation may be needed to determine the specific cause.
N6001A single, fluid-filled sac (cyst) in the right breast
This code indicates the presence of a solitary cyst in the right breast. A breast cyst is a fluid-filled sac that develops within breast tissue. The term 'solitary' means there is only one cyst present, as opposed to multiple cysts. Breast cysts are very common, especially in women between ages 35-50, and are typically benign (non-cancerous). They may feel like a smooth, movable lump and can sometimes cause tenderness or pain, particularly before menstrual periods.
D62Anemia caused by recent significant blood loss
Acute posthemorrhagic anemia is a condition where your red blood cell count drops significantly due to recent blood loss. This can happen after surgery, injury, heavy menstrual bleeding, or internal bleeding. The 'acute' means it developed quickly, and 'posthemorrhagic' means it occurred after bleeding. Your body hasn't had time to replace the lost red blood cells yet, which can cause symptoms like fatigue, weakness, pale skin, and shortness of breath.
N644Breast pain or tenderness
Mastodynia is the medical term for breast pain or tenderness. This condition can affect one or both breasts and may feel like aching, burning, tightness, or sharp pain. The pain can be constant or come and go, and may be related to hormonal changes during menstrual cycles, pregnancy, or menopause. It can also be caused by breast cysts, infections, injury, or certain medications. While breast pain is often benign (not dangerous), healthcare providers may recommend imaging studies like MRI to rule out other conditions and determine the underlying cause.
K921Black, tarry stools containing blood from upper digestive tract bleeding
Melena refers to black, tarry, sticky stools that have a distinctive foul odor. This condition occurs when blood from the upper part of the digestive system (such as the stomach or small intestine) is digested as it passes through the intestines, turning the stool dark black. The blood has been partially digested by stomach acid and enzymes, which gives it this characteristic appearance. This is different from bright red blood in stool, which typically comes from lower in the digestive tract. Melena is always considered a sign that needs medical attention as it indicates bleeding somewhere in the upper digestive system.
R110Nausea - feeling sick to your stomach
This code represents nausea, which is the uncomfortable feeling of needing to vomit or being sick to your stomach. Nausea is a symptom that can occur for many different reasons and may or may not be accompanied by actual vomiting. It's a common symptom that healthcare providers document when patients report feeling queasy, sick to their stomach, or having the urge to throw up.
H93299Other abnormal hearing perceptions in an unspecified ear
This code represents unusual or abnormal ways of hearing sounds that don't fit into other specific categories of hearing disorders. It covers various types of altered sound perception, such as hearing sounds differently than normal, experiencing distorted hearing, or other atypical auditory experiences. The code is used when the specific ear affected (left or right) is not documented or specified.
S92412GDisplaced fracture of the big toe bone (subsequent encounter for delayed healing)
This code represents a subsequent encounter for a displaced fracture of the proximal phalanx (the bone closest to the foot) of the left great toe (big toe) with delayed healing. A displaced fracture means the bone pieces are not properly aligned. The '7th G' indicates this is a follow-up visit specifically because the fracture is taking longer than expected to heal properly.
N6011Non-cancerous cystic changes in the right breast tissue
This code describes a benign (non-cancerous) condition where multiple small fluid-filled sacs (cysts) are present throughout the right breast tissue. This condition, also known as fibrocystic breast disease, involves changes in breast tissue that can cause lumpiness, tenderness, or discomfort. The cysts are typically filled with fluid and are not cancerous. This is a common condition that affects many women and is considered part of normal breast tissue changes.
Z79899Long-term use of other medications not specifically listed elsewhere
This code indicates that a patient is currently taking medication(s) on a long-term basis for ongoing medical conditions. It's used when the specific medication doesn't have its own dedicated code in the medical coding system. This is purely a documentation code that helps healthcare providers track that you're on long-term drug therapy as part of your medical history. It doesn't represent a diagnosis or procedure, but rather provides important context about your current treatment plan.
S36899AInitial treatment for an unspecified injury to internal abdominal organs
This code is used when a patient receives their first medical treatment for an injury to organs inside the abdomen (such as the liver, spleen, kidneys, or intestines), but the specific type of injury or exact organ affected has not been clearly identified or documented. The 'A' at the end indicates this is the initial encounter or first time receiving care for this injury.
Z885Personal history of allergy to narcotic pain medications
This code indicates that you have a documented history of being allergic to narcotic pain medications (also called opioid medications). This is important medical information that helps healthcare providers choose safe alternatives for pain management and avoid prescribing medications that could cause allergic reactions. Examples of narcotic medications include morphine, codeine, oxycodone, and similar pain relievers.
N6019Widespread benign breast cysts in breast tissue
This code describes a benign (non-cancerous) breast condition where multiple fluid-filled sacs (cysts) are present throughout the breast tissue in a widespread pattern. The term 'diffuse' means the cysts are scattered throughout the breast rather than in just one area. 'Mastopathy' refers to a general breast tissue disorder. This condition is also sometimes called fibrocystic breast disease or benign breast disease. The 'unspecified breast' means the medical record doesn't indicate whether it's the left breast, right breast, or both breasts affected.
M3503Sicca syndrome (dry eyes and mouth) with muscle weakness or disease
This code represents sicca syndrome combined with myopathy. Sicca syndrome is a condition that causes dryness of the eyes and mouth due to reduced tear and saliva production. Myopathy refers to muscle disease or weakness. When these two conditions occur together, it indicates that the patient has both the drying symptoms affecting their eyes and mouth, as well as muscle-related problems. This combination can be associated with certain autoimmune conditions that affect both the glands that produce moisture and the muscle tissue.
R112Nausea with vomiting, cause not specified
This code indicates that a patient is experiencing both nausea (feeling sick to your stomach) and vomiting (throwing up), but the underlying cause has not been determined or specified. This is a symptom-based diagnosis used when the specific reason for the nausea and vomiting is unknown or has not yet been identified through medical evaluation.
Z0001Routine adult physical exam where abnormal findings were discovered
This code is used when you have a routine preventive health examination (like an annual physical or wellness visit) and your healthcare provider discovers something abnormal during the exam that requires attention or follow-up. This doesn't mean you're sick - it simply means that during your regular checkup, your doctor found something that needs to be looked at more closely, such as unusual test results, physical findings, or health indicators that fall outside normal ranges.
L2084A type of eczema caused by allergic reactions from within the body
Intrinsic allergic eczema is a form of atopic dermatitis where the skin becomes inflamed, itchy, and irritated due to internal allergic reactions. Unlike contact eczema that's triggered by external substances touching the skin, this type develops from allergic responses that originate inside the body. It typically causes red, scaly, and itchy patches on the skin that may weep or become crusty. This condition is often chronic and may flare up periodically.
S92402DFollow-up visit for a displaced fracture of the left big toe that is healing normally
This code is used for a subsequent healthcare visit (follow-up appointment) for a patient who previously had a displaced fracture of their left great toe (big toe). The fracture type was unspecified in the original diagnosis, but the bone pieces were displaced (moved out of their normal position). This particular code indicates that the patient is now in the healing phase and the fracture is healing as expected without complications. This is not the code used for the initial injury visit, but rather for follow-up care to monitor the healing progress.
Z881Medical record of allergy to antibiotic medications (other than penicillin)
This code indicates that you have a documented allergy or adverse reaction to certain antibiotic medications, excluding penicillin-type antibiotics. This is an important part of your medical history that healthcare providers use to ensure they prescribe safe medications for you. The code helps medical staff quickly identify that you cannot take certain antibiotics and need alternative treatments when antibiotics are necessary.
M797Fibromyalgia - a chronic condition causing widespread muscle pain and tenderness
Fibromyalgia is a chronic disorder characterized by widespread musculoskeletal pain, tenderness at specific points on the body, and often accompanied by fatigue, sleep disturbances, and mood issues. The pain is typically described as a constant dull ache that occurs on both sides of the body and above and below the waist. This condition affects how the brain and spinal cord process pain signals, often amplifying painful sensations.
N760Sudden inflammation of the vagina
Acute vaginitis is the sudden onset of inflammation in the vagina, which is the canal that leads from the outside of the body to the cervix and uterus. This condition involves swelling, irritation, and inflammation of the vaginal tissues that develops quickly (acute means sudden or short-term). It can cause symptoms like itching, burning, discharge, or discomfort. The inflammation can be caused by various factors including infections, irritants, or hormonal changes.
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