Which coding system is used for diseases in health records?

• A. IDC-10
• B. ICD-9
• C. CPT
• D. SNOMED

Answer: (A)

When documenting diseases in health records, the coding system used is ICD-10-CM, the International Classification of Diseases, 10th Revision, Clinical Modification. This framework provides a standardized set of diagnosis codes that clinicians and payers use for documenting conditions, tracking health trends, and supporting billing. ICD-9-CM is older and largely replaced by ICD-10-CM for diagnoses. CPT codes, on the other hand, are for procedures and services rather than diseases. SNOMED CT is a detailed clinical terminology used inside electronic health records to describe patient concepts more granularly and can map to ICD codes, but the official coding of diseases in most health records remains ICD-10-CM.