ICD-10-CM Diagnosis Code Directory
The 67 ICD-10-CM diagnosis codes clinics look up most, each with its billable status, CMS-HCC V28 risk mapping, and a free reference page. Open any code for its HCC risk category, the more-specific codes in its family, related procedures, and documentation rules — shown where available.
Infectious & Parasitic (A00–B99)
Sepsis and other communicable and parasitic conditions.
Blood & Immune (D50–D89)
Anemias and other blood and blood-forming-organ findings.
Endocrine, Nutritional & Metabolic (E00–E89)
Diabetes, obesity, thyroid, lipid, and other metabolic diagnoses.
Type 2 diabetes mellitus without complications
Hyperlipidemia, unspecified
Obesity, unspecified
Type 2 diabetes mellitus with hyperglycemia
Type 2 diabetes mellitus with diabetic chronic kidney disease
Morbid (severe) obesity due to excess calories
Hypothyroidism, unspecified
Vitamin D deficiency, unspecified
Hypokalemia
Mental & Behavioral (F01–F99)
Anxiety, depression, ADHD, and substance-use diagnoses.
Anxiety disorder, unspecified
Major depressive disorder, single episode, unspecified
Major depressive disorder, recurrent, unspecified
Generalized anxiety disorder
Attention-deficit hyperactivity disorder, unspecified type
Nicotine dependence, cigarettes, uncomplicated
Alcohol dependence, uncomplicated
Nervous System (G00–G99)
Migraine, sleep apnea, dementia, and other neurologic conditions.
Circulatory System (I00–I99)
Hypertension, heart failure, atrial fibrillation, and stroke.
Essential (primary) hypertension
Heart failure, unspecified
Unspecified atrial fibrillation
Atherosclerotic heart disease of native coronary artery without angina pectoris
Cerebral infarction, unspecified
Hypertensive heart disease with heart failure
Unspecified sequelae of cerebral infarction
Respiratory System (J00–J99)
Asthma, COPD, pneumonia, and acute respiratory diagnoses.
Chronic obstructive pulmonary disease, unspecified
Unspecified asthma, uncomplicated
Acute upper respiratory infection, unspecified
Chronic obstructive pulmonary disease with (acute) exacerbation
Moderate persistent asthma, uncomplicated
Acute bronchitis, unspecified
Acute pharyngitis, unspecified
Pneumonia, unspecified organism
Acute respiratory failure with hypoxia
Digestive System (K00–K95)
GERD, constipation, and other digestive conditions.
Musculoskeletal (M00–M99)
Back pain, osteoarthritis, and other musculoskeletal diagnoses.
Genitourinary System (N00–N99)
UTI, chronic kidney disease, and other GU conditions.
Symptoms, Signs & Findings (R00–R99)
Chest pain, headache, cough, and other presenting symptoms.
Factors Influencing Health (Z00–Z99)
Encounters, screenings, immunization, and long-term status codes.
Encounter for immunization
Encounter for general adult medical examination without abnormal findings
Encounter for screening for malignant neoplasm of colon
Long term (current) use of insulin
Encounter for general adult medical examination with abnormal findings
Encounter for screening for human papillomavirus (HPV)
Other long term (current) drug therapy
Encounter for antineoplastic chemotherapy
Coding, sequencing, or HCC capture question?
Ask D3 is a free assistant backed by CMS, ICD-10-CM Official Guidelines, and payer rules — get a cited answer in seconds, no signup.
Coding Disclaimer
Codes and descriptions reflect the CMS FY2026 ICD-10-CM code set; HCC categories reflect the CMS-HCC V28 model for payment year 2026. Shown for reference. Official Guidelines, payer coverage, and sequencing rules vary — always confirm against the current ICD-10-CM Official Guidelines and the payer before billing.