Question 1

What is ICD-10 code M87?

Accepted Answer

M87 is the ICD-10-CM diagnosis code for osteonecrosis. M87 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering other osteopathies (m86-m90).

M87 is a non-billable category for osteonecrosis. Move through the official child-code path until the documented detail supports a reportable code.

Question 2

Is M87 an HCC code?

Accepted Answer

M87 is a non-billable header code, so it cannot itself be a payment HCC. Header codes organize more specific child codes that share the same root concept; one of those children may map to a payment HCC under the CMS-HCC V28 or V24 risk adjustment model. Coders should select a child code from the M87 hierarchy that matches the documented presentation, then check that specific child for HCC status.

Question 3

Is M87 billable?

Accepted Answer

No. M87 is a header (non-billable) ICD-10-CM code. Header codes sit at a higher level of the diagnosis hierarchy and exist to organize a family of more specific child codes. Per ICD-10-CM coding guidelines, a header code cannot be reported on a claim as the diagnosis, coders must select a billable child code from the M87 hierarchy that matches the highest level of specificity supported by the provider's documentation. Payers reject header codes submitted as the primary diagnosis.

Question 4

Which HCC does M87 map to under V28?

Accepted Answer

M87 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 M87 pay in RAF?

Accepted Answer

M87 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 documentation supports M87?

Accepted Answer

M87 is a non-billable category for osteonecrosis. Move through the official child-code path until the documented detail supports a reportable code. For this DOS, capture the provider's current assessment and the care action documented for osteonecrosis. Keep the checklist tied to the note. Do not swap M87 with M87.9. The FY2026 tabular describes M87.9 as osteonecrosis, unspecified. Follow the documented detail. M87 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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M87

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M87 ICD-10-CM Code: Osteonecrosis