Question 1

What is ICD-10 code M84.872?

Accepted Answer

M84.872 is the ICD-10-CM diagnosis code for other disorders of continuity of bone, left ankle and foot. A bone disorder affecting the continuity or structural integrity of bone in the left ankle or foot area, not classified as a fracture or other specific condition. M84.872 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering disorders of bone density and structure (m80-m85).

M84.872 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.

Ensure left laterality is documented in the clinical record.

Question 2

Is M84.872 an HCC code?

Accepted Answer

No. M84.872 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 M84.872 billable?

Accepted Answer

Yes. M84.872 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. M84.872 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 M84.872?

Accepted Answer

M84.872 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 M84.872 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 M84.872?

Accepted Answer

Ensure left laterality is documented in the clinical record Consider if a more specific foot bone code would be appropriate

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M84.872

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M84.872 ICD-10-CM Code: Other disorders of continuity of bone, left ankle and foot

HCC Buddy Code Card

M84.872

Is M84.872 an HCC code?

What This Code Means

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Child Codes

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Work M84.872 in HCC Buddy