Is M87.9 a billable ICD-10-CM code?

Yes. M87.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does M87.9 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other osteopathies (M86-M90).

What cannot be coded together with M87.9?

M87.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M87.9 (M87) and apply to it just the same.

M87.9

M87.9 — Osteonecrosis, unspecified

Billable / specific codeICD-10-CM

M87.9 is a billable, specific ICD-10-CM code for osteonecrosis, unspecified. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Necrosis of bone NOS

Excludes1 inherited from the categories above M87.9

These are not written on M87.9, but they bind it: a note on a category applies to every code beneath it. Billing M87.9 with anything listed here is a denial.

Written on M87 — Osteonecrosis

juvenile osteonecrosis (M91-M92)
osteochondropathies (M90-M93)

Risk adjustment

M87.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 92 Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis0.479 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

M87.9 is named in 7 Medicare coverage policies — 0 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A58883Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered

How M87.9 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to M87.9.

Osteonecrosis
Necrosis, necrotic›bone

Code history

M87.9 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share M87. If M87.9 is not quite right, the correct code is usually one of these.

Questions about M87.9

Is M87.9 a billable ICD-10-CM code?: Yes. M87.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does M87.9 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other osteopathies (M86-M90).
What cannot be coded together with M87.9?: M87.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M87.9 (M87) and apply to it just the same.