M86

ICD-10Non-billable category

Osteomyelitis

Official ICD-10-CM descriptor (FY2026)

Osteomyelitis

M86 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

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

Excludes2

Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.

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

Use additional code

Report an additional code to identify the associated condition.

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

More specific codes under M86

Where this code sits

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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