Question 1

What is ICD-10 code M93.871?

Accepted Answer

M93.871 is the ICD-10-CM diagnosis code for other specified osteochondropathies, right ankle and foot. A disease affecting the bone and cartilage in the right ankle and foot area, where the specific type is documented but doesn't fit standard categories. M93.871 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering chondropathies (m91-m94).

M93.871 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

Verify the specific osteochondropathy type is documented in the medical record before assigning this code.

Question 2

Is M93.871 an HCC code?

Accepted Answer

No. M93.871 is a billable ICD-10-CM code but does not map to any payment HCC category under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can still be reported on Medicare Advantage encounter data submissions, but it does not contribute to the beneficiary's Risk Adjustment Factor (RAF) score and therefore does not affect the risk-adjusted capitation payment to the plan. V28 reached 100% phase-in for payment year 2026.

Question 3

Is M93.871 billable?

Accepted Answer

Yes. M93.871 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. M93.871 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Question 4

What is the V28 vs V24 difference for M93.871?

Accepted Answer

M93.871 does not map to a payment HCC under either the CMS-HCC V28 risk adjustment model or the older V24 model. V28 reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. Because neither model rewards M93.871 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's RAF score in either version. Coders should check whether provider documentation supports a more specific child code that does map to a payment HCC.

Question 5

What should coders know when reporting M93.871?

Accepted Answer

Verify the specific osteochondropathy type is documented in the medical record before assigning this code Ensure laterality is clearly documented as right; use M93.872 for left side

M93.871

Is M93.871 an HCC code?

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