Is ICD-10-CM code M86.8X22 billable?

Yes, M86.8X22 (Other osteomyelitis, left upper arm) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2027.

What chapter does ICD-10-CM code M86.8X22 belong to?

M86.8X22 belongs to Chapter 13 of the ICD-10-CM tabular list: M00–M99 (Diseases of the Musculoskeletal System and Connective Tissue).

Is M86.8X22 a new ICD-10-CM code for 2027?

Yes, M86.8X22 was added or revised in the FY2027 ICD-10-CM update, effective October 1, 2026, as published by the Centers for Medicare and Medicaid Services (CMS).

M86.8X22BillableCCNew for FY2027

Other osteomyelitis, left upper arm

Diseases of the Musculoskeletal System and Connective Tissue·Other osteomyelitis, upper arm·subcategory·FY 2027

Bone Infections: Like other parts of the body, bones can get infected. The infections are usually bacterial, but can also be fungal. They may spread to the bone from nearby skin or muscles, or from another part of the body through the bloodstream. People who are at risk for bone infections include those with diabetes, poor circulation, or recent injury to the bone. You may also be at risk if you are having hemodialysis.

Read more about bone infections on MedlinePlus · Source: MedlinePlus, National Library of Medicine

Instructional notes

Also applies, from M86.8: Other osteomyelitis

These notes sit on M86.8 and apply to every code under it, including M86.8X22.

Includes: conditions that are coded here

Brodie's abscess

Also applies, from M86: Osteomyelitis

These notes sit on M86 and apply to every code under it, including M86.8X22.

Excludes1: not coded here, use a different code

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

Excludes2: not included here, code separately if applicable

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

Use additional code: add a second code for this, listed after this one

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

Also applies, from Other osteopathies (M86-M90)

These notes sit on M86-M90 and apply to every code under it, including M86.8X22.

Excludes1: not coded here, use a different code

postprocedural osteopathies (M96.-)

Where M86.8X22 sits

M86-M90 Other osteopathies (M86-M90)
M86 Osteomyelitis
M86.8 Other osteomyelitis
M86.8X Other osteomyelitis
M86.8X2 Other osteomyelitis, upper arm
M86.8X22 Other osteomyelitis, left upper arm

MS-DRGs

As the principal diagnosis, this code groups to these MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Code history

FY 2026: replaced M86.8X2 (Other osteomyelitis, upper arm)