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
R92341Extremely dense breast tissue found on mammogram of the right breast
This code indicates that a mammogram (breast X-ray) showed extremely dense breast tissue in the right breast. Breast density refers to the amount of fibrous and glandular tissue compared to fatty tissue in the breast. Extremely dense breast tissue means there is a high proportion of fibrous and glandular tissue, which appears white on mammograms and can make it more difficult to detect abnormalities. This is a finding about the composition of breast tissue, not a disease or abnormality itself.
K639Intestinal disorder, type not specified
This code indicates that there is a disease or disorder affecting the intestines, but the specific type of condition has not been identified or specified. The intestines are part of the digestive system that help process food and absorb nutrients. This is a very general diagnostic code used when a healthcare provider knows there is an intestinal problem but needs further testing or evaluation to determine the exact condition.
R92343Mammographic finding showing extremely dense breast tissue in both breasts
This code indicates that a mammogram (breast X-ray) has shown extremely dense breast tissue in both breasts. Breast density refers to how much fibrous and glandular tissue there is compared to fatty tissue in the breasts. Extremely dense breasts have very little fatty tissue and are mostly made up of fibrous and glandular tissue. This is a normal variation in breast composition, though denser breast tissue can make it more challenging to detect abnormalities on mammograms and may be associated with slightly higher breast cancer risk. This finding does not indicate the presence of cancer or other disease - it is simply a description of the breast tissue composition seen on the imaging study.
Z9109Other allergy status (not to drugs or biological substances)
This code indicates that you have a documented allergy or allergic reaction to something other than medications or biological substances. This could include allergies to environmental factors like pollen, dust, or pet dander, food allergies, or allergies to materials like latex or metals. This code is used to document your allergy history in your medical record for healthcare providers' reference.
D225Benign moles on the chest, back, or abdomen
This code refers to melanocytic nevi, which are common benign (non-cancerous) skin growths also known as moles. These are located on the trunk area of the body, which includes the chest, back, and abdomen. Melanocytic nevi are collections of pigment-producing cells (melanocytes) that appear as brown, black, or flesh-colored spots on the skin. They are typically harmless but may be monitored or removed for cosmetic reasons or if there are changes in appearance.
K915Postcholecystectomy syndrome - complications after gallbladder removal surgery
This code refers to postcholecystectomy syndrome, which is a condition that can occur after gallbladder removal surgery (cholecystectomy). Patients with this syndrome may experience ongoing digestive symptoms such as abdominal pain, bloating, nausea, or changes in bowel movements even after their gallbladder has been removed. These symptoms can occur because the body is still adjusting to digesting food without a gallbladder, or due to other complications related to the surgery. The condition requires medical evaluation and management to help improve symptoms and quality of life.
Z6831Body Mass Index (BMI) between 31.0 and 31.9 in adults
This code indicates that your Body Mass Index (BMI) falls between 31.0 and 31.9. 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 classified as obesity class I according to standard medical guidelines. This code is used for documentation and tracking purposes in your medical record.
R4701Difficulty or inability to speak or understand language due to brain dysfunction
Aphasia is a condition that affects your ability to communicate through speaking, understanding speech, reading, or writing. It typically occurs when areas of the brain responsible for language are damaged, most commonly after a stroke, but can also result from brain injury, infection, or other neurological conditions. The severity can range from mild difficulty finding words to complete inability to communicate verbally. This code is used when aphasia is documented but the specific type is not specified.
R109Unspecified abdominal pain
This code represents stomach or belly pain where the exact location or cause hasn't been specifically identified. It's used when a patient experiences abdominal discomfort, but the healthcare provider hasn't determined the precise area of the abdomen that's causing the pain or the underlying reason for it. This is a common diagnostic code used during the evaluation process when abdominal pain is the main concern but requires further assessment to determine the specific cause.
G541Lumbosacral plexus disorders - nerve problems in the lower back and pelvis area
This code refers to disorders affecting the lumbosacral plexus, which is a network of nerves located in your lower back and pelvis region. The lumbosacral plexus is formed by nerve roots that branch out from your spinal cord in the lower lumbar (lower back) and sacral (tailbone) areas. When these nerves are damaged, compressed, or inflamed, it can cause symptoms like pain, numbness, tingling, or weakness that may affect your lower back, hips, buttocks, and legs. These disorders can result from various causes including injury, compression, inflammation, or other medical conditions affecting this important nerve network that controls movement and sensation in your lower body.
I6389Other type of stroke (cerebral infarction) not specified elsewhere
This code represents a stroke caused by a blocked blood vessel in the brain (cerebral infarction). When brain tissue doesn't receive enough blood and oxygen due to a blockage, the affected brain cells die, which is called an infarction. This particular code is used for strokes that don't fit into other more specific stroke categories. A stroke is a serious medical emergency that can cause lasting effects on movement, speech, thinking, or other brain functions depending on which part of the brain is affected.
I440Mild delay in electrical signals between the upper and lower chambers of the heart
First-degree atrioventricular block is a condition where there is a slight delay in the electrical signals traveling from the upper chambers (atria) to the lower chambers (ventricles) of the heart. This delay is measured on an electrocardiogram (EKG) and is typically mild. Most people with first-degree AV block have no symptoms and the condition often requires no treatment, though it may indicate underlying heart conditions that need monitoring.
S92405ANon-displaced fracture of left big toe, initial encounter
This code represents a break in the bone of the left big toe where the broken pieces remain properly aligned (non-displaced). The fracture location is unspecified, meaning it could be in any part of the big toe bone. This is coded as an initial encounter, which means this is the first time you're receiving treatment for this specific injury.
F341Persistent depressive disorder (dysthymia) - a chronic form of depression lasting at least 2 years
Dysthymic disorder, also known as persistent depressive disorder, is a chronic form of depression characterized by a depressed mood that occurs for most of the day, for more days than not, for at least 2 years in adults (1 year in children and adolescents). While the symptoms may be less severe than major depression, they are long-lasting and can significantly impact daily functioning. Symptoms may include poor appetite or overeating, insomnia or sleeping too much, low energy, low self-esteem, poor concentration, and feelings of hopelessness.
Z720Current tobacco use
This code indicates that you currently use tobacco products. It's used by healthcare providers to document tobacco use as part of your medical record. This information helps your healthcare team understand factors that may affect your health and treatment plans. Tobacco use can impact many aspects of health including wound healing, surgical outcomes, and risk for various diseases.
R9230Abnormal findings on diagnostic imaging of breast
This code indicates that imaging tests of your breast (such as mammography, ultrasound, MRI, or CT scan) showed something unusual or abnormal. This doesn't necessarily mean cancer - abnormal findings can include many things like cysts, benign lumps, dense tissue, calcifications, or other changes that need further evaluation. Your doctor will discuss what was found and may recommend additional tests or follow-up imaging to determine what the abnormal finding means for your health.
Z48810Follow-up care visit after surgery on eyes, ears, or other sense organs
This code is used when you visit your healthcare provider for routine follow-up care after having surgery on your sense organs (such as your eyes, ears, nose, or related structures). This is not for treating complications, but rather for normal post-surgical care like checking how you're healing, removing stitches, or monitoring your recovery progress. These visits are a standard part of surgical care to ensure you're healing properly.
E7800High cholesterol levels in the blood, type not specified
This code indicates that you have pure hypercholesterolemia, which means you have elevated levels of cholesterol in your blood. The 'unspecified' part means that the specific type or cause of your high cholesterol hasn't been determined or documented. Pure hypercholesterolemia refers to having high cholesterol without other lipid abnormalities. High cholesterol can increase your risk of heart disease and stroke if left untreated, but it's a common condition that can often be managed through lifestyle changes and/or medication.
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.
N62Abnormal enlargement of breast tissue
This code indicates that breast tissue has grown larger than normal size. This condition can affect one or both breasts and can occur in people of any gender. The enlargement is typically benign (non-cancerous) and may be due to hormonal changes, medications, or other factors. It's different from breast cancer or other malignant conditions.
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.
S9032XABruising of the left foot - first visit for this injury
This code represents a contusion (bruise) of the left foot during the initial medical encounter for this specific injury. A contusion occurs when small blood vessels under the skin are damaged from impact or trauma, causing discoloration, swelling, and tenderness without breaking the skin. The 'initial encounter' designation means this is the first time you're receiving medical care for this particular foot injury.
W19XXXDFollow-up care for a fall injury where the specific type of fall was not documented
This code is used when you are receiving follow-up medical care for injuries sustained from a fall, but the medical records do not specify exactly how or where the fall occurred. This is a subsequent encounter code, meaning it's used for visits after your initial treatment for the fall-related injury. The 'unspecified' part indicates that details about the fall circumstances (such as falling from stairs, ladder, or on the same level) were not documented in your medical record.
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.
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.
R5381General feeling of discomfort, illness, or uneasiness not classified elsewhere
This code represents a general feeling of being unwell, uncomfortable, or having a vague sense that something is wrong with your health that doesn't fit into more specific categories. Malaise is a non-specific symptom that can manifest as fatigue, weakness, or an overall feeling of being 'off' or not quite right. This particular code is used when the malaise doesn't match other more specific types already defined in the medical coding system.
L42Pityriasis rosea - a common, temporary skin rash with pink, scaly patches
Pityriasis rosea is a common, harmless skin condition that causes a distinctive rash. It typically begins with a single, larger patch (called a 'herald patch') followed by smaller pink or salmon-colored, oval-shaped patches with fine scales. The rash often appears in a Christmas tree pattern on the back and chest. This condition is temporary and usually resolves on its own within 6-12 weeks without treatment. While the exact cause is unknown, it's believed to be triggered by a viral infection and is not contagious once the rash appears.
E785High levels of fats (lipids) in the blood, type not specified
This code indicates that blood tests have shown elevated levels of fats (lipids) such as cholesterol and triglycerides in your bloodstream, but the specific type of lipid disorder has not been identified or specified. Hyperlipidemia means having too much fat in the blood, which can increase the risk of heart disease and stroke if left untreated. The 'unspecified' designation means your healthcare provider has documented elevated lipid levels but hasn't yet determined or documented the specific subtype of the condition.
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.
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.
E669Obesity diagnosis without specific type or cause identified
This code indicates a medical diagnosis of obesity where the healthcare provider has determined that a patient's body weight significantly exceeds what is considered healthy for their height, but has not specified the particular type of obesity or its underlying cause. Obesity is typically defined as having a body mass index (BMI) of 30 or higher. This general code is used when the medical record documents obesity but doesn't provide additional details about severity level, cause, or specific subtype.
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.
L218Other types of seborrheic dermatitis not specifically classified elsewhere
This code represents seborrheic dermatitis that doesn't fit into other specific categories. Seborrheic dermatitis is a common skin condition that causes scaly, itchy rashes, typically in areas with many oil glands like the scalp, face, chest, and back. This particular code covers variants of the condition that don't match the more specific seborrheic dermatitis classifications in the medical coding system.
Z124Routine cervical cancer screening visit
This code is used when you visit a healthcare provider specifically for routine screening to check for cervical cancer. This includes preventive tests like Pap smears or HPV tests that are done when you have no symptoms and are not being treated for any cervical problems. The screening is performed to detect potential cancer or pre-cancerous changes early, when treatment is most effective.
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.
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.
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.
Z961Presence of intraocular lens (artificial lens in the eye)
This code indicates that you have an intraocular lens (IOL) implanted in your eye. An intraocular lens is an artificial lens that is surgically placed inside the eye, typically to replace the eye's natural lens. This is most commonly done during cataract surgery when the clouded natural lens is removed and replaced with a clear artificial lens. The presence of an intraocular lens is considered a factor that may influence your health status and contact with health services, which is why it has its own medical code for documentation purposes.
L810Skin darkening that occurs after inflammation or injury heals
Postinflammatory hyperpigmentation is a common condition where areas of skin become darker than the surrounding skin after inflammation, injury, or irritation has healed. This darkening occurs because the inflammatory process triggers increased melanin (pigment) production in the affected area. The dark spots or patches are typically flat and can range from light brown to black in color. This condition is more common in people with darker skin tones and can result from various causes including acne, eczema, cuts, burns, or other skin trauma.
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.
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.
L578Other skin changes caused by long-term exposure to non-ionizing radiation
This code represents skin changes that develop from chronic (long-term) exposure to non-ionizing radiation sources. Non-ionizing radiation includes ultraviolet light, infrared radiation, microwaves, and radio waves. This code is used when the skin changes don't fit into other more specific categories of radiation-induced skin damage. Examples might include chronic skin changes from prolonged sun exposure, occupational radiation exposure, or medical treatments involving non-ionizing radiation.
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.
Z882Medical record notation indicating a known allergy to sulfonamide medications
This code is used to document in your medical record that you have a known allergy or adverse reaction to sulfonamide medications (also called sulfa drugs). Sulfonamides are a class of antibiotics and other medications that can cause allergic reactions in some people. This code helps healthcare providers know to avoid prescribing sulfa-containing medications to prevent allergic reactions. It's a documentation code rather than a billable diagnosis.
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.
N390Urinary tract infection with location not specified
This code indicates a urinary tract infection (UTI) where the specific location within the urinary system has not been identified or specified. A UTI is a bacterial infection that can affect any part of the urinary system including the kidneys, ureters, bladder, or urethra. This particular code is used when the healthcare provider has diagnosed a UTI but has not documented or determined the exact site of the infection.
D251Non-cancerous tumor in the muscle wall of the uterus
An intramural leiomyoma is a benign (non-cancerous) tumor that grows within the muscle wall of the uterus. These tumors, also commonly called fibroids, develop from the smooth muscle tissue of the uterine wall. Intramural fibroids are located within the thick muscular layer of the uterus and are the most common type of uterine fibroid. They can vary in size and may cause symptoms such as heavy menstrual bleeding, pelvic pressure, or pain, though some may cause no symptoms at all.
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.
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.
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.
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