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M86 ICD-10-CM Code: Osteomyelitis

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Official description

M86

Osteomyelitis

ICD-10-CM diagnosis code · United States clinical modification

Where M86 sits

  1. 1

    Chapter 13

    Diseases of the musculoskeletal system and connective tissue (M00-M99)

  2. 2

    Section

    Other osteopathies (M86-M90)

  3. 3

    Category M86

    Osteomyelitis

  4. 4

    Code M86

    Osteomyelitis

Codes under M86

M86 is a non-billable category. Choose the child code that best matches the documented diagnosis.

M86.0Acute hematogenous osteomyelitisM86.1Other acute osteomyelitisM86.2Subacute osteomyelitisM86.3Chronic multifocal osteomyelitisM86.4Chronic osteomyelitis with draining sinusM86.5Other chronic hematogenous osteomyelitisM86.6Other chronic osteomyelitisM86.8Other osteomyelitisM86.9Osteomyelitis, unspecified

Notes for this code

Inclusion terms

No inclusion terms are listed for M86.

Code first

No “code first” instruction is listed for M86.

Use additional code

  • code (B95-B97) to identify infectious agent

Excludes1

Conditions that should not be reported together with this code.

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

Excludes2

Conditions not included here that may be reported separately when present.

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

Source and release

Data release
U.S. ICD-10-CM · FY 2027
Effective date
Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Frequently asked questions

What does ICD-10-CM code M86 mean?

M86 is the FY 2027 U.S. ICD-10-CM code for “Osteomyelitis.”

Is M86 a billable or specific ICD-10-CM code?

No. M86 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is M86 located in ICD-10-CM?

M86 is listed in Chapter 13, Diseases of the musculoskeletal system and connective tissue (M00-M99), within Other osteopathies (M86-M90) (M86–M90), under category M86, Osteomyelitis.

What coding notes are listed for M86?

No inclusion terms are listed for M86 in this reference record. No code-first instruction is listed. Additional-code instructions: code (B95-B97) to identify infectious agent. Excludes1 notes: osteomyelitis due to:; echinococcus (B67.2); gonococcus (A54.43); salmonella (A02.24). Excludes2 notes: ostemyelitis of:; orbit (H05.0-); petrous bone (H70.2-); vertebra (M46.2-).