M87.86 – Other osteonecrosis, tibia and fibula
ICD-10-CM 2027 diagnosis code · Other osteopathies
ICD-10-CM code
M87.86
- Code
M87.86(claims format:M8786)- Description
- Other osteonecrosis, tibia and fibula
- 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 › M87.8
Billable codes under M87.86
M87.86 is a header code and cannot be used on claims. Choose the most specific code:
- M87.861 – Other osteonecrosis, right tibiaBillable
- M87.862 – Other osteonecrosis, left tibiaBillable
- M87.863 – Other osteonecrosis, unspecified tibiaBillable
- M87.864 – Other osteonecrosis, right fibulaBillable
- M87.865 – Other osteonecrosis, left fibulaBillable
- M87.869 – Other osteonecrosis, unspecified fibulaBillable
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
Use additional code:
- code to identify major osseous defect, if applicable (M89.7-)
Block M86-M90
Excludes1 (not coded here):
- postprocedural osteopathies (M96.-)
Index terms for M87.86
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M87.8
- M87.80 – Other osteonecrosis, unspecified boneBillable
- M87.81 – Other osteonecrosis, shoulderHeader
- M87.82 – Other osteonecrosis, humerusHeader
- M87.83 – Other osteonecrosis of radius, ulna and carpusHeader
- M87.84 – Other osteonecrosis, hand and fingersHeader
- M87.85 – Other osteonecrosis, pelvis and femurHeader
- M87.87 – Other osteonecrosis, ankle, foot and toesHeader
- M87.88 – Other osteonecrosis, other siteBillable
- M87.89 – Other osteonecrosis, multiple sitesBillable
Frequently asked questions
What is ICD-10 code M87.86?
M87.86 is the ICD-10-CM code for other osteonecrosis, tibia and fibula, in the block M86-M90 (Other osteopathies).
Is M87.86 a billable code?
No. M87.86 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M87.86 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.