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
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.
D23112Benign (non-cancerous) mole or skin growth on the eyelid
This code refers to a benign nevus, which is a non-cancerous mole or pigmented skin growth located on the eyelid. These are common, harmless skin lesions that contain clusters of pigment-producing cells called melanocytes. While they are typically not dangerous, eyelid nevi may be monitored or removed for cosmetic reasons, if they interfere with vision, or if there are any changes in appearance that warrant evaluation. An ophthalmologist or dermatologist can assess whether any treatment is needed.
L820Inflamed seborrheic keratosis - a common, non-cancerous skin growth that has become irritated or inflamed
Seborrheic keratoses are very common, benign (non-cancerous) skin growths that appear as brown, black, or tan patches on the skin. They often look waxy, scaly, or slightly raised and are sometimes called 'barnacles' because of their appearance. When these growths become inflamed, they may appear red, swollen, tender, or irritated. This inflammation can occur from friction (like clothing rubbing against them), scratching, or other minor trauma. While seborrheic keratoses are harmless, inflamed ones may be uncomfortable and should be evaluated by a healthcare provider to confirm the diagnosis and discuss treatment options if needed.
Z1389Routine screening visit to check for a specific health condition
This code is used when you visit your doctor for preventive screening to check for a particular health disorder or condition, even though you don't currently have symptoms. This is different from a diagnostic visit where you're being examined because of symptoms you're experiencing. Screening visits are proactive healthcare measures designed to catch potential health issues early, when they're most treatable. The specific disorder being screened for would be documented elsewhere in your medical record. This type of visit is typically part of routine preventive care and may be covered by insurance as a preventive service.
R9720Blood test showing higher than normal levels of PSA, a protein made by the prostate gland
This code indicates that a blood test called PSA (Prostate Specific Antigen) showed levels higher than the normal range. PSA is a protein produced by cells in the prostate gland, and small amounts normally circulate in the blood. Elevated PSA levels can have several causes, including prostate cancer, benign prostate enlargement (BPH), prostate infection, recent medical procedures involving the prostate, or even vigorous physical activity. An elevated PSA doesn't automatically mean cancer - it's a screening tool that helps doctors determine if further testing is needed. Your doctor will consider your PSA level along with other factors like your age, family history, and physical exam results to decide on next steps.
Q249A birth defect affecting the heart's structure that hasn't been specifically identified
This code indicates that a person was born with a heart defect, but the specific type of defect hasn't been determined or specified in the medical records. Congenital heart defects are structural problems with the heart that are present from birth. They can affect the heart's walls, valves, or blood vessels. The term 'unspecified' means that while doctors know there is a heart malformation, they either haven't identified the exact type yet or the medical documentation doesn't include those specific details. These conditions can range from very mild defects that may never cause problems to more serious ones that require ongoing medical care or treatment.
F319Bipolar disorder diagnosis without specific subtype identified
This code indicates a diagnosis of bipolar disorder, a mental health condition that causes unusual shifts in mood, energy, and activity levels. People with bipolar disorder experience periods of unusually intense emotion, changes in sleep patterns and activity levels, and uncharacteristic behaviors. These distinct periods are called 'mood episodes.' The 'unspecified' designation means that while bipolar disorder has been diagnosed, the specific type (such as Bipolar I or Bipolar II) has not been determined or documented at this time. This might be used during initial evaluation or when there isn't enough information yet to specify the exact subtype.
M5450Low back pain
This code represents low back pain, which is pain located in the lower portion of your back (lumbar region). This is a very common condition that can range from mild discomfort to severe pain that affects your daily activities. The pain may be caused by muscle strain, ligament sprain, disc problems, arthritis, or other spine-related issues. It can be acute (sudden onset, short-term) or chronic (long-lasting). The pain might stay in one spot or spread to your buttocks, hips, or legs.
M4134Curved spine (scoliosis) in the chest area caused by chest/lung problems
Thoracogenic scoliosis is a sideways curvature of the spine in the chest (thoracic) region that develops as a result of problems with the chest cavity, lungs, or surrounding tissues. Unlike other types of scoliosis that may have unknown causes, this specific type occurs when chest or lung conditions cause the spine to curve abnormally. The curvature typically develops as the body tries to compensate for underlying chest or respiratory issues. This condition affects the middle portion of the spine where the ribs attach, and may impact breathing, posture, and overall spinal alignment.
L4050Joint inflammation and skin condition caused by psoriatic arthritis, type not specified
Arthropathic psoriasis is a condition where you have both psoriasis (a skin condition that causes red, scaly patches) and arthritis (joint inflammation and pain) occurring together. This is also known as psoriatic arthritis. The 'unspecified' part means the doctor hasn't identified which specific type or pattern of psoriatic arthritis you have. This condition can affect various joints in your body, causing pain, stiffness, and swelling, while also causing skin symptoms. It's an autoimmune condition where your immune system mistakenly attacks healthy joints and skin tissue.
N3010Chronic bladder wall inflammation without blood in urine
Interstitial cystitis is a chronic condition where the bladder wall becomes inflamed and irritated. This causes symptoms like frequent urination, urgent need to urinate, and pelvic pain or pressure. The 'without hematuria' part means there is no visible blood in the urine. This is a long-term condition that can significantly impact quality of life, but it can be managed with various treatments including dietary changes, medications, and sometimes procedures to help reduce bladder inflammation and pain.
R319Blood in urine of unknown cause
Hematuria means there is blood present in your urine, which can make it appear pink, red, or brown. 'Unspecified' means your doctor has detected blood in your urine but hasn't yet determined the specific cause. This can happen for many reasons, ranging from minor issues like urinary tract infections or kidney stones to more serious conditions. The blood might be visible to you, or it might only be detected through laboratory testing. Your healthcare provider will likely want to do additional tests to find out why there's blood in your urine and determine the best treatment approach.
M542Neck pain
Cervicalgia is the medical term for neck pain. This code is used when a patient experiences pain in the cervical spine area (the neck region). The pain can range from mild discomfort to severe pain and may be caused by various factors such as muscle strain, poor posture, injury, or other underlying conditions affecting the neck area.
R778Other specified abnormal levels or types of proteins in blood plasma
This code indicates that blood tests have found abnormal levels or types of proteins in your blood plasma (the liquid part of blood). These are specific protein abnormalities that don't fit into other more common categories. Plasma proteins include substances like albumin, globulins, and other important proteins that help with blood clotting, immune function, and maintaining proper fluid balance in your body. The abnormality has been identified and documented but represents a less common type that requires this specific diagnostic code.
L981Self-inflicted skin condition (factitial dermatitis)
Factitial dermatitis is a skin condition where lesions or wounds are intentionally created or worsened by the patient themselves. This can involve scratching, picking, rubbing, or applying substances to the skin. The resulting skin damage appears artificial or self-induced rather than from a natural disease process. This condition may be related to psychological factors, stress, or compulsive behaviors.
W541XXAInitial medical visit for injury caused by being struck by a dog
This code is used to document the first time a patient seeks medical care for an injury that occurred when they were struck by a dog. This is an external cause code that describes how the injury happened, not what specific injury occurred. It would be used alongside other codes that describe the actual injuries sustained (such as cuts, bruises, or fractures). The 'initial encounter' designation means this is the first time the patient is receiving treatment for this particular incident.
E649Long-term effects from an unspecified nutritional deficiency
This code represents the lasting health effects or complications that result from a nutritional deficiency where the specific type of deficiency was not identified or documented. Sequelae refers to conditions that are the consequence of a previous disease or injury. This would apply to ongoing health problems that developed as a result of not getting enough of certain nutrients, vitamins, or minerals in the past, but the exact nutritional deficiency that caused these effects is not specified in the medical record.
M546Pain in the middle back (thoracic spine)
This code indicates pain located in the thoracic spine, which is the middle portion of your back that includes the 12 vertebrae between your neck and lower back. The thoracic spine is where your ribs attach to your backbone. This code specifically describes pain in this region without specifying the underlying cause of the pain.
S199XXAUnspecified neck injury, first visit for treatment
This code represents an injury to the neck area where the specific type or nature of the injury has not been determined or documented. The 'initial encounter' designation means this is the first time you are receiving medical care for this particular neck injury. This is a general code used when doctors know there is a neck injury but need more time, tests, or evaluation to determine exactly what type of injury occurred.
B961Klebsiella pneumoniae bacteria identified as the cause of a disease classified elsewhere
This code indicates that laboratory testing has identified Klebsiella pneumoniae bacteria as the specific cause of an infection or disease. Klebsiella pneumoniae is a type of bacteria that can cause various infections including pneumonia, urinary tract infections, bloodstream infections, and wound infections. This code is used alongside another primary diagnosis code that describes the actual infection or disease. It helps healthcare providers document the specific bacterial cause, which is important for determining the most effective antibiotic treatment.
L249Skin irritation and inflammation caused by direct contact with an irritating substance, but the specific cause is not identified
This code represents irritant contact dermatitis where the skin has become red, inflamed, itchy, or developed a rash due to direct contact with an irritating substance (like chemicals, soaps, or other materials), but the healthcare provider has not specified or identified the exact substance that caused the reaction. Unlike allergic contact dermatitis, this type occurs from direct chemical damage to the skin rather than an immune system response.
L603Abnormal nail growth or appearance
Nail dystrophy refers to abnormal development, growth, or appearance of fingernails or toenails. This can include changes in nail thickness, shape, color, texture, or growth patterns. The nails may become thickened, thin, brittle, ridged, discolored, or have other structural abnormalities. This condition can affect one or multiple nails and may be caused by various factors including infections, injuries, genetic conditions, or underlying health issues.
Z9842History of cataract surgery on the left eye
This code indicates that you have previously had cataract extraction surgery on your left 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 already been completed on your left eye, which is important information for your ongoing eye care and any future medical treatments.
H02889Other specified disorders of eyelid
This code represents various specific eyelid disorders that don't fit into other more common categories. The eyelid is the thin fold of skin that covers and protects your eye. This code covers conditions that affect the eyelid's structure, function, or appearance in ways that are medically significant but don't match the criteria for more commonly diagnosed eyelid problems. The specific disorder would be documented in your medical records along with this code.
B9620E. coli bacteria identified as the cause of a disease classified elsewhere in medical records
This code indicates that Escherichia coli (E. coli) bacteria has been identified as the underlying cause of a disease or condition that is primarily classified under a different medical code. E. coli is a type of bacteria that can cause various infections throughout the body. This particular code is used when the specific strain or type of E. coli is not specified, and it's being documented as the causative agent for another diagnosed condition.
E663Medical diagnosis indicating body weight above normal range but below obesity threshold
This code indicates that a healthcare provider has documented that your body weight is above the normal or healthy range for your height and build, but has not reached the level classified as obesity. Overweight is typically defined as having a Body Mass Index (BMI) between 25-29.9. This diagnosis may be used during routine checkups, weight management consultations, or when weight is a factor in other health conditions. It serves as documentation for medical records and may be relevant for treatment planning or health monitoring.
M779Inflammation or irritation of tissue where tendons or ligaments attach to bone, location not specified
Enthesopathy refers to a condition where the tissues that connect tendons or ligaments to bones become inflamed, irritated, or damaged. This code indicates that such a condition is present but the specific location in the body and exact type of enthesopathy has not been specified. Common symptoms may include pain, stiffness, and tenderness at the attachment points of tendons and ligaments to bones.
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.
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.
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.
L259Skin inflammation from contact with an irritant or allergen, cause not specified
This code represents contact dermatitis, which is inflammation of the skin that occurs when it comes into contact with certain substances. Contact dermatitis can be caused by irritants (like harsh chemicals or soaps) or allergens (substances you're allergic to). This particular code is used when the healthcare provider has diagnosed contact dermatitis but hasn't specified what type it is or what caused it. Symptoms typically include redness, itching, swelling, and sometimes blistering of the affected skin area.
Z743Medical code indicating a patient requires continuous supervision for their safety and care
This ICD-10 code is used to document when a patient has a medical need for continuous supervision. This means the patient requires ongoing monitoring and oversight for their health, safety, or wellbeing due to their medical condition or circumstances. The supervision may be needed to prevent harm, ensure proper care is received, or monitor for changes in the patient's condition. This code is typically used for administrative and documentation purposes to justify the level of care being provided.
S3991XAUnspecified abdominal injury - first medical visit
This code indicates an injury to the abdomen (belly area) where the specific type or exact nature of the injury has not been determined or specified. The 'initial encounter' means this is the first time you are receiving medical care for this particular injury. This is a general code used when doctors know there is an abdominal injury but need more time, tests, or evaluation to determine the exact type of injury.
K5190Ulcerative colitis without complications
This code represents ulcerative colitis, a chronic inflammatory bowel disease that causes inflammation and ulcers in the lining of the large intestine (colon) and rectum. The 'unspecified' designation means the exact type or extent of ulcerative colitis is not further detailed in the medical record. 'Without complications' indicates that at the time of this diagnosis, there are no additional serious complications like bleeding, perforation, or other severe issues associated with the condition.
S36031SLong-term effects or complications from a previous moderate tear of the spleen
This code represents the ongoing effects, complications, or conditions that result from a previous moderate laceration (tear) of the spleen. The spleen is an organ in the upper left part of the abdomen that helps filter blood and fight infections. A moderate laceration means there was a significant tear in the spleen tissue that was more serious than a minor injury but less severe than a major rupture. The 'sequela' part means this code is used when the patient is being treated for problems that developed as a result of that previous spleen injury, rather than for the original injury itself.
R609Swelling or fluid retention in body tissues, cause not specified
Edema refers to the abnormal accumulation of fluid in body tissues, causing swelling. This code is used when a patient has documented swelling or fluid retention, but the underlying cause has not been determined or specified. Edema can occur in various parts of the body including the legs, feet, hands, face, or throughout the body. The swelling may be visible as puffiness or can be detected when pressing on the skin leaves a temporary indentation.
M25472Fluid buildup in the left ankle joint
This code indicates there is an abnormal accumulation of fluid within the left ankle joint space. Joint effusion occurs when excess fluid builds up in the joint, which can cause swelling, stiffness, and discomfort. This fluid buildup can result from various causes including injury, inflammation, infection, or underlying joint conditions. The effusion specifically affects the left ankle joint.
I8393Enlarged, twisted veins in both legs that cause no symptoms
This code describes varicose veins that are present in both lower legs or feet but are not currently causing any symptoms like pain, swelling, or discomfort. Varicose veins are enlarged, twisted veins that occur when the valves in the veins don't work properly, causing blood to pool. Even though these veins may be visible under the skin, they are not causing any noticeable problems at this time.
I83222Varicose veins in left leg with ulcer on calf and inflammation
This code describes a condition where you have varicose veins (enlarged, twisted veins) in your left lower leg that has progressed to include both an open sore (ulcer) specifically on the calf area and inflammation of the surrounding tissue. Varicose veins occur when vein walls weaken and blood pools, causing the veins to bulge. When complicated by ulceration and inflammation, this represents a more advanced stage of venous disease that requires medical attention.
H02054Inward-growing eyelashes on the left upper eyelid without eyelid turning inward
This condition involves eyelashes on the left upper eyelid that grow inward toward the eye, causing them to rub against the eyeball or inner eyelid. Unlike entropion (where the entire eyelid turns inward), in this case only the individual lashes are misdirected while the eyelid position remains normal. This can cause eye irritation, scratching sensation, tearing, and potential damage to the cornea if left untreated.
H259Age-related cataract, type not specified
This code indicates you have a cataract (clouding of the natural lens in your eye) that is related to aging, but the specific type or stage of the cataract has not been specified in your medical record. Cataracts are very common as people get older and typically develop gradually, causing blurry vision, increased glare sensitivity, and difficulty seeing in low light. The lens becomes cloudy over time, which interferes with clear vision.
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.
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.
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.
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.
D239Non-cancerous skin growth, type and location not specified
This code represents a benign (non-cancerous) skin tumor or growth where the specific type of growth and its exact location on the body have not been specified in the medical documentation. Benign skin neoplasms are abnormal tissue growths that do not spread to other parts of the body and are generally not life-threatening. Common examples include moles, skin tags, lipomas, or cysts, but this particular code is used when the medical record doesn't provide enough detail to assign a more specific code.
Z9079Medical history code indicating surgical removal of genital organs not specified elsewhere
This is a medical history code used to document that a person has had one or more genital organs surgically removed in the past, where the specific organ(s) don't fit into other more specific ICD-10 categories. This code is used for medical record-keeping and billing purposes to indicate this aspect of a patient's surgical history. It does not represent a current medical condition requiring treatment, but rather documents a previous surgical procedure that may be relevant to current or future medical care.
H10533Inflammation of eyelids and eye surface caused by contact with irritants, affecting both eyes
Contact blepharoconjunctivitis is a condition where both the eyelids (blepharitis) and the clear membrane covering the eye (conjunctivitis) become inflamed due to direct contact with an irritating substance. This bilateral condition affects both eyes and typically occurs when allergens, chemicals, cosmetics, or other irritants come into contact with the eye area. Symptoms commonly include redness, swelling, itching, burning, tearing, and discharge from both eyes.
D529Anemia caused by not having enough folate (a B vitamin) in your body
This code indicates a type of anemia where your body doesn't have enough healthy red blood cells due to insufficient folate (also called folic acid or vitamin B9). Folate is essential for making healthy red blood cells. When you don't get enough folate from food or supplements, or your body can't absorb it properly, you can develop this type of anemia. Symptoms may include fatigue, weakness, pale skin, shortness of breath, and difficulty concentrating. This 'unspecified' designation means the exact cause or subtype of the folate deficiency hasn't been determined.
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