Question 1

What is ICD-10 code M65.151?

Accepted Answer

M65.151 is the ICD-10-CM diagnosis code for other infective (teno)synovitis, right hip. An infection of the tendon sheath in the right hip, affecting the tendons around the hip joint. M65.151 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering disorders of synovium and tendon (m65-m67).

M65.151 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.

Confirm right hip is documented in the clinical record before using this laterality-specific code.

Question 2

Is M65.151 an HCC code?

Accepted Answer

No. M65.151 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 M65.151 billable?

Accepted Answer

Yes. M65.151 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. M65.151 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

Which HCC does M65.151 map to under V28?

Accepted Answer

M65.151 does not map to a CMS-HCC V28 payment category. Check the current CMS-HCC V28 model file for payment year 2026 rather than an older V24 tip sheet.

Question 5

What does M65.151 pay in RAF?

Accepted Answer

M65.151 has no separately stated V28 community RAF weight. If it is not a V28 payment HCC, it adds nothing to a community RAF score.

Question 6

What is the V28 vs V24 difference for M65.151?

Accepted Answer

M65.151 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 community model rewards M65.151 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's V28/V24 community RAF score in either version. Coders should check whether provider documentation supports a more specific child code that does map to a community payment HCC.

Question 7

What documentation supports M65.151?

Accepted Answer

Confirm right hip is documented in the clinical record before using this laterality-specific code Hip tenosynovitis may present with groin pain or hip mobility issues; ensure proper anatomical documentation M65.151 is not a CMS-HCC payment code, so MEAT is not the payment hook. Documentation still has to support the diagnosis if you report it.

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M65.151

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M65.151 ICD-10-CM Code: Other infective (teno)synovitis, right hip

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M65.151

Is M65.151 an HCC code?

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