ICD codes are used for which purpose?

• A. International Classification of Diseases and Reason for Visits
• B. Durable Medical Equipment Coding
• C. NPI Number Assignments
• D. Hospital Outpatient Coding Standards

Answer: (A)

ICD codes are the standardized labels used to classify diseases, symptoms, and other health problems that bring a patient in for care. They are used to document the diagnosis or the reason for the encounter so payers can process claims accurately and public health data can track disease patterns. This coding supports reimbursement by linking the patient’s diagnosed condition to the appropriate payment rules, and it also feeds epidemiology and quality measurement. The other options refer to different coding systems or purposes: durable medical equipment coding is handled with HCPCS codes, NPI numbers identify providers, and hospital outpatient coding standards involve multiple code sets (including CPT and HCPCS) rather than ICD codes alone.