How does HCC coding differ from fee-for-service (FFS) coding?

How does HCC coding differ from fee-for-service (FFS) coding?

• A. HCC uses ICD-10-CM codes only for risk adjustment, while FFS uses CPT/HCPCS codes, and medical necessity is proven by ICD-10-CM diagnoses.
• B. HCC uses CPT codes for risk adjustment; FFS uses ICD-10-CM codes.
• C. HCC and FFS use identical coding practices.
• D. HCC requires coding to be validated by auditors before submission.

Answer: (A)