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ICD-10-CM 2027 diagnosis code

M86.49Chronic osteomyelitis with draining sinus, multiple sites

✓ Billable / specificCC — complication/comorbidity

M86.49 is a valid, billable ICD-10-CM code for chronic osteomyelitis with draining sinus, multiple sites. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 M86.49

M86.49 is the ICD-10-CM diagnosis code for chronic osteomyelitis with draining sinus, multiple sites. 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 M86.4 (chronic osteomyelitis with draining sinus), M86.49 is specifically for chronic osteomyelitis with draining sinus, multiple sites. Related codes cover unspecified site (M86.40), shoulder (M86.41), humerus (M86.42), radius and ulna (M86.43), hand (M86.44), femur (M86.45), tibia and fibula (M86.46), ankle and foot (M86.47) and 1 more.

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 456 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with MCC, relative weight 7.6244), DRG 457 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with CC, relative weight 5.3668), DRG 458 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection without CC/MCC, relative weight 4.0388), 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 has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 730.19 (chronic osteomyelitis, multiple sites).

Notes that apply from higher levels

Instructions written at a parent level also apply to M86.49.

› 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

1 entries

Terms in the official ICD-10-CM index that lead to M86.49.

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

ICD-9-CM equivalent

Converter →
  • 730.19Chronic osteomyelitis, multiple 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)
  • No changes since FY2016.

Common questions about M86.49

Is M86.49 billable?

Yes. M86.49 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M86.49 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M86.49 as a principal diagnosis.

Is M86.49 a CC or MCC?

M86.49 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does M86.49 group to?

M86.49 is used in the MS-DRG v44.0 logic for MS-DRG 456 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with MCC), MS-DRG 457 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with CC), MS-DRG 458 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection without CC/MCC), 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.

What is the ICD-9 code for M86.49?

The CMS General Equivalence Mappings map M86.49 to ICD-9-CM 730.19.