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ICD-10-CM 2027 diagnosis code

M86.8X32Other osteomyelitis, left forearm

✓ Billable / specificNew for 2027CC — complication/comorbidity

M86.8X32 is a valid, billable ICD-10-CM code for other osteomyelitis, left forearm. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS, effective October 1, 2026. Updated September 29, 2026. About our data

About M86.8X32

M86.8X32 is the ICD-10-CM diagnosis code for other osteomyelitis, left forearm. It belongs to category M86 (osteomyelitis), block M86-M90 (other osteopathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within M86.8X3 (other osteomyelitis, forearm), M86.8X32 is specifically for other osteomyelitis, left forearm. Related codes cover right forearm (M86.8X31) and unspecified forearm (M86.8X39).

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

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 539 (Osteomyelitis with MCC, relative weight 1.9385), DRG 540 (Osteomyelitis with CC, relative weight 1.3079) and DRG 541 (Osteomyelitis without CC/MCC, relative weight 0.8297), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It was added in FY2027, effective October 1, 2026.

Notes that apply from higher levels

Instructions written at a parent level also apply to M86.8X32.

› 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.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 08 · Diseases and Disorders 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
  • FY2027 (effective 10/1/2026): Added

Common questions about M86.8X32

Is M86.8X32 billable?

Yes. M86.8X32 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M86.8X32 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M86.8X32 as a principal diagnosis.

Is M86.8X32 a CC or MCC?

M86.8X32 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does M86.8X32 group to?

M86.8X32 is used in the MS-DRG v44.0 logic for MS-DRG 539 (Osteomyelitis with MCC), MS-DRG 540 (Osteomyelitis with CC) and MS-DRG 541 (Osteomyelitis without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

Did M86.8X32 change for 2027?

Yes. For FY2027 (effective October 1, 2026) it was added to the code set.