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857 codes

Adult codes

Diagnoses the Medicare Code Editor expects only for patients age 15 through 124. Source: Medicare Code Editor (MCE) v44, effective October 1, 2026.

Chapter 1: Certain infectious and parasitic diseases

Chapter 2: Neoplasms

Chapter 4: Endocrine, nutritional and metabolic diseases

Chapter 5: Mental, Behavioral and Neurodevelopmental disorders

Chapter 6: Diseases of the nervous system

Chapter 7: Diseases of the eye and adnexa

Chapter 9: Diseases of the circulatory system

Chapter 10: Diseases of the respiratory system

Chapter 11: Diseases of the digestive system

Chapter 13: Diseases of the musculoskeletal system and connective tissue

Chapter 14: Diseases of the genitourinary system

Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Chapter 19: Injury, poisoning and certain other consequences of external causes

Chapter 21: Factors influencing health status and contact with health services