Which statement correctly describes ICD 10 Z-codes?

• A. They provide standard documentation for social determinants of health
• B. They are used for diagnosing mental illness
• C. They are used for anesthesia billing
• D. They measure heart rate

Answer: (A)

ICD-10 Z-codes are used to document factors that influence health status and encounters with health services, not diseases themselves. They provide a standardized way to record non-diagnostic information that can affect care, such as social determinants of health, reasons for visits, screening, or other circumstances surrounding care. That’s why the statement describing them as standard documentation for social determinants of health is the best description. The other options miss the purpose: mental illness is diagnosed with other ICD-10-CM codes (not Z-codes); anesthesia billing uses different coding systems (CPT or ICD-10-PCS for procedures), not Z-codes; and vital signs like heart rate aren’t coded with ICD-10 codes.