ICD codes are used to classify which aspect of medical care?

• A. Diagnoses
• B. Procedures
• C. Medications
• D. Patient demographics

Answer: (A)

ICD codes classify diagnoses—the medical conditions, symptoms, and health problems that define why a patient is seen. They provide a standardized way to document the patient’s health issues for the medical record, billing, and data reporting. This focus on the diagnosis differentiates ICD coding from other coding systems used for different purposes: procedures are coded with systems like CPT or ICD-10-PCS, medications use drug-specific codes, and patient demographics are captured separately in the chart. For example, a record might code a diagnosed pneumonia and a separate diabetes condition to reflect why treatment is needed and how the patient’s overall health affects care.