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ICD-10-CM 2027 diagnosis code

M86.3Chronic multifocal osteomyelitis

Not billable — use a more specific code

M86.3 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M86.3

M86.3 is the ICD-10-CM diagnosis code for chronic multifocal osteomyelitis. It belongs to category M86 (osteomyelitis), block M86-M90 (other osteopathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

Within M86 (osteomyelitis), M86.3 is specifically for chronic multifocal osteomyelitis. Related codes cover acute hematogenous osteomyelitis (M86.0), other acute osteomyelitis (M86.1), subacute osteomyelitis (M86.2), chronic osteomyelitis with draining sinus (M86.4), other chronic hematogenous osteomyelitis (M86.5), other chronic osteomyelitis (M86.6), other osteomyelitis (M86.8) and unspecified (M86.9).

To report this condition, pick the subcode that matches the documentation: M86.30 (unspecified site), M86.31 (shoulder), M86.32 (humerus), M86.33 (radius and ulna), M86.34 (hand), M86.35 (femur), M86.36 (tibia and fibula), M86.37 (ankle and foot) and 2 more.

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

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under M86.3

Notes that apply from higher levels

Instructions written at a parent level also apply to M86.3.

› From M86 Osteomyelitis
Excludes1
Excludes2
Use additional code
  • code (B95-B97) to identify infectious agent
  • code to identify major osseous defect, if applicable (M89.7-)

Broader instructions also apply from M86-M90 Other osteopathies and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about M86.3

Is M86.3 billable?

No. M86.3 is a header code. Report one of its more specific subcodes instead.