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ICD-10-CM 2027 diagnosis code

M86.8X8Other osteomyelitis, other site

Not billable — use a more specific code

M86.8X8 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code last changed in FY2027 (effective October 1, 2026). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M86.8X8

M86.8X8 is the ICD-10-CM diagnosis code for other osteomyelitis, other site. 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 3 subcodes must be used instead.

Within M86.8X, choose M86.8X8 (other site) only when documentation doesn't support a more specific option: multiple sites (M86.8X0), shoulder (M86.8X1), upper arm (M86.8X2), forearm (M86.8X3), hand (M86.8X4), thigh (M86.8X5), lower leg (M86.8X6), ankle and foot (M86.8X7) and 1 more.

To report this condition, pick the subcode that matches the documentation: M86.8X80 (skull), M86.8X81 (sinuses) and M86.8X89 (site).

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 changed in FY2027 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 730.18 (chronic osteomyelitis, other specified sites).

Specific codes under M86.8X8

Notes that apply from higher levels

Instructions written at a parent level also apply to M86.8X8.

› 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.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to M86.8X8.

ICD-9-CM equivalent

Converter →
  • 730.18Chronic osteomyelitis, other specified sitesapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

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)
  • FY2027 (effective 10/1/2026): Expanded — no longer billable

Common questions about M86.8X8

Is M86.8X8 billable?

No. M86.8X8 is a header code. Report one of its more specific subcodes instead.

What is the ICD-9 code for M86.8X8?

The CMS General Equivalence Mappings map M86.8X8 to ICD-9-CM 730.18.

Did M86.8X8 change for 2027?

Yes. For FY2027 (effective October 1, 2026) it was expanded into more specific subcodes, so it is no longer billable.