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
J322Chronic inflammation of the ethmoid sinuses
This code represents chronic ethmoidal sinusitis, which is a long-term inflammation of the ethmoid sinuses. The ethmoid sinuses are small air-filled spaces located between your nose and brain, behind the bridge of your nose. When these sinuses become chronically inflamed, it can cause ongoing symptoms like nasal congestion, facial pressure, reduced sense of smell, and post-nasal drip. Unlike acute sinusitis which lasts a short time, chronic sinusitis persists for 12 weeks or longer despite treatment attempts.
Z8679Personal history of other heart and blood vessel diseases
This code indicates that you have a documented medical history of heart or blood vessel (circulatory system) diseases that don't fall into other specific categories. This is used to track your medical background and may influence current treatment decisions. It covers past conditions affecting your heart, arteries, veins, or other parts of your circulatory system that aren't classified under more specific history codes.
M5030Wear and tear of cervical spine discs in the neck region
This code represents degeneration (breakdown or wear and tear) of the discs between the vertebrae in the cervical spine (neck region). The discs act as cushions between the bones of the spine, and over time they can deteriorate due to aging, injury, or other factors. This specific code is used when the disc degeneration doesn't fit into other more specific categories and the exact level of the cervical spine is not specified in the medical documentation.
R430Complete loss of smell (anosmia)
This code represents anosmia, which is the complete inability to smell. This condition means you cannot detect any odors or scents. Anosmia can be temporary or permanent and may result from various causes including infections, nasal blockages, head injuries, or other medical conditions. It has gained particular attention as a symptom associated with COVID-19, though it can occur for many other reasons.
N6012Diffuse cystic mastopathy (fibrocystic breast condition) affecting the left breast
This code refers to diffuse cystic mastopathy of the left breast, which is a benign (non-cancerous) breast condition. Also known as fibrocystic breast disease, this condition involves the development of fluid-filled cysts and fibrous tissue throughout the breast tissue. It's a common, non-malignant condition that can cause breast tenderness, lumpiness, or pain, particularly before menstrual periods. The term 'diffuse' means the condition affects multiple areas of the breast rather than being localized to one spot. This is specifically documented for the left breast.
R4781Slurred speech - difficulty speaking clearly with words that sound unclear or mumbled
This code represents slurred speech, which is a symptom where a person has difficulty speaking clearly. The words may sound unclear, mumbled, or difficult to understand. Slurred speech can affect the clarity and articulation of words, making communication challenging. This is a symptom code that describes what is observed, not a specific diagnosis of an underlying condition.
I83892Varicose veins in the left leg with complications other than ulcer or inflammation
This code indicates varicose veins (enlarged, twisted veins) in the left lower leg that have developed complications beyond simple varicose veins. These complications exclude ulcers or inflammation, but may include other issues such as bleeding, blood clots, or skin changes. Varicose veins occur when vein valves don't work properly, causing blood to pool and veins to become enlarged and twisted.
E71120A rare genetic disorder where the body cannot properly break down certain proteins and fats
Methylmalonic acidemia is an inherited metabolic disorder caused by a deficiency in enzymes needed to process certain amino acids (building blocks of proteins) and odd-chain fatty acids. When these substances cannot be properly broken down, methylmalonic acid builds up in the blood and urine, which can be toxic to the body. This condition is present from birth and can affect multiple organ systems including the brain, liver, and kidneys. Symptoms may include developmental delays, feeding difficulties, vomiting, lethargy, and in severe cases, life-threatening complications.
E6601Morbid (severe) obesity due to excess calories
This code represents a diagnosis of morbid obesity, also called severe obesity, that is specifically caused by consuming too many calories. Morbid obesity is a serious medical condition where a person's weight significantly exceeds what is considered healthy for their height and poses substantial health risks. This particular code is used when the obesity is determined to be the result of excess caloric intake rather than other underlying medical conditions.
B029Shingles (herpes zoster) without complications
This code represents a diagnosis of shingles, also known as herpes zoster, that occurs without any complications. Shingles is a viral infection that causes a painful rash and is caused by the same virus that causes chickenpox. When coded as 'without complications,' it means the shingles outbreak is straightforward and has not led to additional medical problems such as nerve pain that persists after the rash heals, eye involvement, or other secondary conditions.
J9811Collapsed or partially collapsed lung tissue
Atelectasis occurs when part or all of a lung collapses or doesn't inflate properly. This means the tiny air sacs (alveoli) in the affected area deflate or fill with fluid, mucus, or other material instead of air. It can happen after surgery, due to blocked airways, pressure on the lung, or shallow breathing. While it can be serious, it's often treatable with breathing exercises, position changes, or other medical interventions.
I2510Hardening of the arteries in the heart's natural blood vessels without chest pain
This code indicates atherosclerotic heart disease affecting the native (original, not bypassed or stented) coronary arteries without angina pectoris (chest pain). Atherosclerosis is a condition where fatty deposits, cholesterol, and other substances build up in the artery walls, causing them to narrow and harden. This affects the coronary arteries that supply blood to the heart muscle. The 'without angina pectoris' specification means the patient does not experience the typical chest pain or discomfort associated with reduced blood flow to the heart.
M25851Other specified joint disorders affecting the right hip
This code represents joint problems in the right hip that don't fit into other specific categories. It's used when there's a diagnosed joint disorder affecting the right hip joint that has specific characteristics but doesn't match the criteria for other more common hip joint conditions. This is part of the musculoskeletal system disease classification and covers various types of joint disorders that affect the right hip specifically.
B353Athlete's foot (fungal infection of the feet)
Tinea pedis, commonly known as athlete's foot, is a fungal infection that affects the skin of the feet. This condition is caused by dermatophyte fungi that thrive in warm, moist environments. It typically affects the spaces between the toes and the soles of the feet, causing symptoms such as itching, burning, scaling, cracking, and sometimes blistering of the skin. The infection is contagious and can spread through direct contact or contaminated surfaces like shower floors, locker rooms, and shared footwear.
D735Death of spleen tissue due to blocked blood supply
Infarction of the spleen occurs when blood flow to part or all of the spleen is blocked, causing that tissue to die from lack of oxygen and nutrients. The spleen is an organ in the upper left part of the abdomen that helps filter blood and fight infections. This condition can cause severe abdominal pain, especially in the left upper area, and may be caused by blood clots, sickle cell disease, or other conditions that affect blood circulation.
I340Mitral valve doesn't close properly (not caused by rheumatic fever)
This code indicates that the mitral valve in your heart is not closing completely, allowing blood to leak backward from the left ventricle into the left atrium. This condition is specifically not caused by rheumatic fever or rheumatic heart disease. The mitral valve insufficiency (also called mitral regurgitation) can be caused by various factors such as age-related wear, heart muscle problems, or other conditions affecting the valve structure.
H524Age-related difficulty focusing on close objects
Presbyopia is a natural, age-related condition where the eye's lens becomes less flexible over time, making it difficult to focus on close objects like reading material or phone screens. This typically begins around age 40 and gradually worsens. It's not a disease but a normal part of aging that affects nearly everyone. Common symptoms include holding reading material at arm's length, eyestrain when doing close work, and headaches after reading or detailed tasks.
I83899Varicose veins in the leg with other complications
This code represents varicose veins in an unspecified lower extremity (leg) that have developed other complications beyond the basic varicose vein condition. Varicose veins are enlarged, twisted veins that commonly occur in the legs. The 'other complications' refers to additional problems that can develop with varicose veins, such as skin changes, inflammation, or other issues not specifically categorized elsewhere in the coding system.
R94120Abnormal hearing test results
This code indicates that a hearing function test or study showed abnormal results. This means that during a specialized hearing evaluation, the test results were outside the normal range, suggesting there may be an issue with your hearing or auditory system. The specific type of abnormality would depend on which particular hearing test was performed and what the results showed. This code is used to document that the hearing test itself was abnormal, but additional evaluation may be needed to determine the exact nature and cause of the hearing problem.
J330Polyp of nasal cavity
This code represents a polyp (a small, usually benign growth) located in the nasal cavity. Nasal polyps are soft, painless, noncancerous growths that develop on the lining of the nasal passages or sinuses. They typically result from chronic inflammation and can cause symptoms like nasal congestion, reduced sense of smell, runny nose, or facial pressure.
R590Enlarged lymph nodes in a specific area of the body
This code indicates that lymph nodes (small, bean-shaped structures that are part of your immune system) have become enlarged or swollen in a localized area of your body. Lymph nodes can become enlarged for various reasons, including infections, immune responses, or other medical conditions. The enlargement is confined to a specific region rather than being widespread throughout the body.
D72820High number of lymphocytes (white blood cells) in the blood causing symptoms
This code indicates that you have lymphocytosis, which means there are more lymphocytes (a type of white blood cell) in your blood than normal, and this increase is causing noticeable symptoms. Lymphocytes are important cells in your immune system that help fight infections and diseases. When their numbers are elevated and causing symptoms, it could indicate your body is responding to an infection, inflammation, or other medical condition. The 'symptomatic' part means you're experiencing signs or symptoms related to this elevated white blood cell count, rather than it just being an incidental finding on lab work.
Z887Medical record indicating allergy to serum and vaccine
This code is used in medical records to document that a patient has a known allergy or adverse reaction to serum and vaccine products. This is an important safety notation that helps healthcare providers avoid administering substances that could cause allergic reactions. The code is part of the ICD-10 classification system used for medical record keeping and helps ensure continuity of care by alerting all healthcare team members to this allergy status.
H6993Unspecified disorder affecting the Eustachian tubes in both ears
This code indicates a problem with the Eustachian tubes in both ears, but the specific type of disorder has not been identified or specified. The Eustachian tubes are small passages that connect your middle ear to the back of your throat and help equalize air pressure in your ears. When these tubes don't work properly, you may experience symptoms like ear fullness, hearing changes, or discomfort. The 'unspecified' nature means your healthcare provider has identified there is an issue with these tubes but hasn't determined the exact cause or type of problem.
H6691Ear infection in the right ear, type not specified
This code represents otitis media in the right ear, which is an infection or inflammation of the middle ear (the space behind the eardrum). The 'unspecified' designation means the exact type of ear infection hasn't been determined or documented in detail. Otitis media commonly causes ear pain, hearing difficulties, and sometimes fever. It can affect people of all ages but is particularly common in children.
H6693Ear infection affecting both ears (type not specified)
This code represents otitis media, which is an infection or inflammation of the middle ear space behind the eardrum. In this case, it affects both ears (bilateral) and the specific type of ear infection has not been determined or specified. Otitis media can cause symptoms like ear pain, hearing difficulties, feeling of fullness in the ears, and sometimes fever. The middle ear is the small space behind your eardrum that normally contains air, but during an infection it may fill with fluid or pus, causing discomfort and temporary hearing problems.
H93293Abnormal hearing perceptions affecting both ears
This code represents unusual or abnormal hearing experiences that affect both ears. This could include hearing sounds differently than normal, experiencing distorted hearing, or other atypical auditory perceptions. The condition is bilateral, meaning it impacts hearing in both the left and right ears. This is a specific diagnostic code used to classify various types of hearing perception problems that don't fall into other more specific categories.
Z129Screening visit to check for cancer (unspecified site)
This code represents a medical visit where your doctor performs or orders a screening to check for cancer, but the specific body part or organ being screened is not identified in the billing record. Cancer screenings are preventive services designed to detect cancer early — often before symptoms appear — when it is most treatable. This type of visit is typically a new patient office visit focused on evaluating your risk and determining what cancer screening tests may be appropriate for you.
D485New patient office visit to evaluate an abnormal skin growth whose behavior (benign or cancerous) is not yet certain
This claim represents a first-time office visit (new patient) with a healthcare provider to assess a skin neoplasm (growth or lesion) that has been identified but whose nature — whether it is benign (non-cancerous), malignant (cancerous), or somewhere in between — has not yet been definitively determined. The diagnosis code D48.5 specifically means 'Neoplasm of Uncertain Behavior of Skin,' indicating that the growth requires further evaluation, testing, or monitoring before a final diagnosis can be made. This is not a confirmed cancer diagnosis, but it does signal that the growth needs careful medical attention. Common next steps may include a biopsy, dermatology referral, or imaging to better understand the lesion.
D229A mole (melanocytic nevus) that has not been identified as being in a specific location on the body.
This code refers to a melanocytic nevus — commonly known as a mole — where the specific location on the body has not been documented or specified. Moles are very common, benign (non-cancerous) skin growths made up of pigment-producing cells called melanocytes. They can appear anywhere on the body, vary in color from pink to dark brown, and may be flat or raised. Most moles are harmless, but they are sometimes examined or removed to rule out skin cancer, particularly melanoma. This diagnosis was recorded during a new patient office visit, meaning this was likely the first time you were seen by this provider for evaluation of the mole.
Z872Personal history of skin and subcutaneous tissue diseases
This code indicates that a patient has a past medical history of a disease affecting the skin or the tissue just beneath the skin (subcutaneous tissue), but is no longer actively being treated for that condition. It is used to inform healthcare providers of prior skin-related health issues that may be relevant to current or future care. Examples of conditions this may cover include past skin infections, inflammatory skin diseases, or other disorders of the skin and underlying tissue that have since resolved or been treated.
R1032Pain in the lower left area of the abdomen
This code represents pain located in the left lower quadrant (LLQ) of the abdomen — the lower-left section of your belly. This area contains parts of the large intestine (descending and sigmoid colon), the left ovary and fallopian tube (in females), the left ureter, and other structures. This is a diagnosis code used to document and describe the symptom of pain in this specific region, and does not indicate a confirmed underlying cause.
K625Bleeding from the anus or rectum (rectal hemorrhage)
This code represents bleeding occurring from the anus or rectum, also known as rectal hemorrhage or hematochezia (bright red blood passed through the rectum). This is a diagnosis used when a patient experiences visible blood coming from the lower digestive tract, specifically the anal or rectal area. This can range from minor bleeding to more significant hemorrhage and requires medical evaluation to determine the underlying cause.
B351Fungal infection of the fingernails or toenails
Tinea unguium is a fungal infection that affects the nails, most commonly the toenails but can also affect fingernails. This condition is caused by the same types of fungi that cause athlete's foot and other skin infections. The infection typically makes nails thick, discolored (yellow, brown, or white), brittle, and sometimes causes them to separate from the nail bed. It's more common in adults and can be persistent, often requiring several months of treatment with antifungal medications. The condition is not dangerous but can be cosmetically concerning and may cause discomfort if nails become very thick.
R000Fast heart rate (over 100 beats per minute) without a specific identified cause
Tachycardia means your heart is beating faster than normal - typically over 100 beats per minute when you're at rest. The 'unspecified' part means that while your doctor has identified that your heart rate is elevated, they haven't yet determined the specific underlying cause. This could be due to various factors like stress, caffeine, medications, dehydration, fever, or underlying heart conditions. Your healthcare provider will likely want to investigate further to understand why your heart rate is elevated and determine if any treatment is needed.
Z7189Other specialized counseling services not covered by more specific codes
This code is used when you receive professional counseling or therapeutic guidance that doesn't fit into other specific counseling categories. It covers various types of specialized counseling services such as grief counseling, stress management counseling, lifestyle counseling, or other therapeutic conversations with healthcare professionals. This is typically used for outpatient visits where the primary purpose is to receive counseling support for mental health, behavioral, or life adjustment issues that require professional guidance but don't fall under more specific diagnostic categories.
L821Non-cancerous skin growths that appear as brown, black, or tan raised spots, typically found on the chest, back, shoulders, or face
Seborrheic keratoses are common, harmless skin growths that look like waxy, scaly, or slightly raised patches on your skin. They can range in color from light tan to dark brown or black, and may appear 'stuck on' to the skin surface. These growths are very common as people age and are sometimes called 'wisdom spots' or 'barnacles.' While they can look concerning, they are benign (non-cancerous) and don't require treatment unless they become irritated, cosmetically bothersome, or change in appearance. This particular code refers to seborrheic keratoses that don't fit into other specific categories.
A6922Nervous system problems caused by Lyme disease (not including the most common types)
This code is used when Lyme disease has affected your nervous system in ways that don't fit the more common neurological complications. Lyme disease is caused by bacteria from infected tick bites and can sometimes spread to the nervous system, causing various neurological symptoms. This particular code covers the less typical nervous system effects, which might include problems with thinking, memory, coordination, or other neurological functions. The specific symptoms can vary from person to person, but they are directly related to the Lyme disease infection affecting your nervous system.
K588Other forms of irritable bowel syndrome (IBS) - a chronic digestive condition causing abdominal pain and changes in bowel habits
This code represents other types of irritable bowel syndrome (IBS) that don't fit into the more specific IBS categories. IBS is a common, chronic digestive disorder that affects the large intestine (colon). It causes symptoms like abdominal pain, cramping, bloating, gas, and changes in bowel movements - which can include diarrhea, constipation, or both. The 'other' classification means your specific type of IBS doesn't match the typical patterns of IBS with predominantly diarrhea, constipation, or mixed symptoms. IBS is a functional disorder, meaning the digestive system doesn't work properly, but there's no structural damage to the intestines. While uncomfortable and sometimes disruptive to daily life, IBS is not life-threatening and doesn't increase your risk of serious diseases like cancer.
D469A blood disorder where bone marrow doesn't produce healthy blood cells properly
Myelodysplastic syndrome (MDS) is a group of blood disorders that occur when your bone marrow - the spongy tissue inside your bones that makes blood cells - doesn't work properly. In MDS, the bone marrow produces blood cells that are abnormal in shape, size, or number. These faulty cells often die in the bone marrow or shortly after entering the bloodstream, leading to low counts of healthy red blood cells, white blood cells, and platelets. This 'unspecified' diagnosis means the exact type of MDS hasn't been determined yet or doesn't fit into a more specific category. MDS primarily affects older adults and can sometimes progress to acute leukemia. Symptoms may include fatigue, shortness of breath, easy bruising or bleeding, and increased risk of infections.
N401Enlarged prostate gland causing urinary problems
Benign prostatic hyperplasia (BPH) is a non-cancerous enlargement of the prostate gland that commonly occurs as men age. The enlarged prostate can press against the urethra (the tube that carries urine from the bladder), causing various urinary symptoms. These symptoms may include difficulty starting urination, weak urine stream, frequent urination (especially at night), feeling like the bladder doesn't empty completely, or sudden urges to urinate. This condition is very common in older men and is not related to prostate cancer. Treatment options range from lifestyle changes and medications to minimally invasive procedures, depending on symptom severity.
Z6832Documentation of Body Mass Index (BMI) between 32.0-32.9 for an adult patient
This code is used by healthcare providers to document that an adult patient has a Body Mass Index (BMI) in the range of 32.0 to 32.9. 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 is classified as Class I obesity according to medical standards. This code helps your doctor track your health status and may be used for treatment planning, insurance documentation, or monitoring your progress over time. The code itself doesn't represent a treatment or procedure - it's simply a way to record this important health measurement in your medical records.
I70213Hardening of arteries in both legs causing cramping pain when walking
This code describes atherosclerosis (hardening and narrowing of arteries) in the natural blood vessels of both legs, which causes intermittent claudication. Intermittent claudication means you experience cramping, pain, or fatigue in your leg muscles when walking or exercising, which goes away when you rest. This happens because the narrowed arteries can't supply enough blood and oxygen to your leg muscles during activity. The condition affects the native (original) arteries in your extremities (arms or legs), specifically both legs in this case.
I739Blood circulation problems in arms, legs, or other areas outside the heart and brain
Peripheral vascular disease (PVD) refers to problems with blood circulation in the blood vessels outside of your heart and brain - typically in your arms and legs. This condition occurs when these blood vessels become narrowed, blocked, or damaged, making it harder for blood to flow properly to your muscles and tissues. Common symptoms may include leg pain when walking, numbness or tingling in extremities, cold hands or feet, slow-healing wounds, or changes in skin color. The 'unspecified' designation means the exact type or location of the vascular problem hasn't been detailed in your medical record. This is often diagnosed during routine office visits through physical examination, medical history review, and sometimes additional tests.
L609A nail problem that hasn't been specifically identified or diagnosed yet
This code is used when you have a problem with one or more of your fingernails or toenails, but your healthcare provider hasn't yet determined the exact type of nail disorder you have. Nail problems can include things like changes in nail color, texture, thickness, or shape; nail pain or tenderness; nail separation from the nail bed; or other abnormalities. Your doctor will likely need to do further examination or testing to figure out the specific cause of your nail issue and provide a more precise diagnosis.
N3943Involuntary leaking of urine after finishing urination
Post-void dribbling is a condition where small amounts of urine continue to leak out after you think you've finished urinating. This happens because some urine remains in the urethra (the tube that carries urine out of the body) and drips out afterward. It's more common in men due to the longer length of the male urethra, but can occur in anyone. This condition can be caused by weakened pelvic floor muscles, prostate issues in men, or incomplete bladder emptying. While often not serious, it can be bothersome and may indicate an underlying urological condition that should be evaluated by a healthcare provider.
M7552Inflammation of the fluid-filled sac (bursa) in your left shoulder
Bursitis of the left shoulder means you have inflammation in a small, fluid-filled sac called a bursa that cushions the bones, tendons, and muscles around your shoulder joint. When this bursa becomes inflamed, it can cause pain, swelling, and limited movement in your left shoulder. This condition often develops from repetitive motions, overuse, injury, or prolonged pressure on the shoulder. Common symptoms include shoulder pain that may worsen with movement, tenderness when touching the area, and difficulty lifting your arm or reaching overhead.
H903Permanent hearing loss in both ears due to inner ear or nerve damage
Sensorineural hearing loss is a type of permanent hearing loss that occurs when there is damage to the inner ear (cochlea) or the hearing nerve pathways to the brain. 'Bilateral' means it affects both ears. This condition can range from mild to profound and may develop gradually over time or occur suddenly. Unlike conductive hearing loss (which involves problems with the outer or middle ear), sensorineural hearing loss typically cannot be corrected with surgery and often requires hearing aids or other assistive devices. Common causes include aging, prolonged exposure to loud noise, certain medications, infections, head trauma, or genetic factors.
N4340A fluid-filled cyst in the epididymis (tube that stores sperm)
A spermatocele is a benign (non-cancerous) fluid-filled cyst that develops in the epididymis, which is the coiled tube located behind each testicle that stores and transports sperm. These cysts contain fluid that may include sperm and are usually painless. They feel like small lumps above or behind the testicle and are quite common, especially in men over 40. Most spermatoceles don't cause symptoms and don't affect fertility or require treatment unless they become large enough to cause discomfort.
N433Fluid buildup around the testicle causing swelling
A hydrocele is a condition where fluid accumulates in the sac surrounding the testicle, causing the scrotum to swell. This can occur on one or both sides and may be present from birth or develop later in life. While usually painless, it can cause discomfort due to the size and weight of the swelling. The 'unspecified' designation means the medical record doesn't specify additional details about the type or location of the hydrocele. Most hydroceles are harmless, though large ones may require treatment for comfort or cosmetic reasons.
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