M86.8X – Other osteomyelitis

ICD-10-CM 2027 diagnosis code · Other osteopathies

Non-billable header

ICD-10-CM code M86.8X

Code: M86.8X (claims format: M868X)
Description: Other osteomyelitis
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: M86 › M86.8

Billable codes under M86.8X

M86.8X is a header code and cannot be used on claims. Choose the most specific code:

M86.8X0 – Other osteomyelitis, multiple sitesBillable
M86.8X1 – Other osteomyelitis, shoulderHeader (more codes below)
M86.8X2 – Other osteomyelitis, upper armHeader (more codes below)
M86.8X3 – Other osteomyelitis, forearmHeader (more codes below)
M86.8X4 – Other osteomyelitis, handHeader (more codes below)
M86.8X5 – Other osteomyelitis, thighHeader (more codes below)
M86.8X6 – Other osteomyelitis, lower legHeader (more codes below)
M86.8X7 – Other osteomyelitis, ankle and footHeader (more codes below)
M86.8X8 – Other osteomyelitis, other siteHeader (more codes below)
M86.8X9 – Other osteomyelitis, unspecified sitesBillable

Notes inherited from parent codes

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

M86 – Osteomyelitis

Excludes1 (not coded here):

osteomyelitis due to:
echinococcus (B67.2)
gonococcus (A54.43)
salmonella (A02.24)

Excludes2 (not included here):

ostemyelitis of:
orbit (H05.0-)
petrous bone (H70.2-)
vertebra (M46.2-)

Use additional code:

code (B95-B97) to identify infectious agent
code to identify major osseous defect, if applicable (M89.7-)

M86.8 – Other osteomyelitis

Applicable to:

Brodie's abscess

Block M86-M90

Excludes1 (not coded here):

postprocedural osteopathies (M96.-)

Index terms for M86.8X

Entries in the ICD-10-CM alphabetic index that lead to this code:

Frequently asked questions

What is ICD-10 code M86.8X?

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

Is M86.8X a billable code?

No. M86.8X is a header code with more specific child codes; report one of the billable codes listed above.

What category does M86.8X belong to?

It belongs to category M86 – Osteomyelitis.

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.