M87.8 – Other osteonecrosis

ICD-10-CM 2027 diagnosis code · Other osteopathies

Non-billable header

ICD-10-CM code M87.8

Code: M87.8 (claims format: M878)
Description: Other osteonecrosis
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
Block: M86-M90 Other osteopathies
Parent codes: M87

Billable codes under M87.8

M87.8 is a header code and cannot be used on claims. Choose the most specific code:

M87.80 – Other osteonecrosis, unspecified boneBillable
M87.81 – Other osteonecrosis, shoulderHeader (more codes below)
M87.82 – Other osteonecrosis, humerusHeader (more codes below)
M87.83 – Other osteonecrosis of radius, ulna and carpusHeader (more codes below)
M87.84 – Other osteonecrosis, hand and fingersHeader (more codes below)
M87.85 – Other osteonecrosis, pelvis and femurHeader (more codes below)
M87.86 – Other osteonecrosis, tibia and fibulaHeader (more codes below)
M87.87 – Other osteonecrosis, ankle, foot and toesHeader (more codes below)
M87.88 – Other osteonecrosis, other siteBillable
M87.89 – Other osteonecrosis, multiple sitesBillable

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

M87 – Osteonecrosis

Includes:

avascular necrosis of bone

Excludes1 (not coded here):

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

Use additional code:

code to identify major osseous defect, if applicable (M89.7-)

Block M86-M90

Excludes1 (not coded here):

postprocedural osteopathies (M96.-)

Related codes in M87

M87.0 – Idiopathic aseptic necrosis of boneHeader
M87.1 – Osteonecrosis due to drugsHeader
M87.2 – Osteonecrosis due to previous traumaHeader
M87.3 – Other secondary osteonecrosisHeader
M87.9 – Osteonecrosis, unspecifiedBillable

Frequently asked questions

What is ICD-10 code M87.8?

M87.8 is the ICD-10-CM code for other osteonecrosis, in the block M86-M90 (Other osteopathies).

Is M87.8 a billable code?

No. M87.8 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M87.8 belong to?

It belongs to category M87 – Osteonecrosis.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.