ICD-10-CM 2027 diagnosis code
M60.009Infective myositis, unspecified site
M60.009 is a valid, billable ICD-10-CM code for infective myositis, unspecified site. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Infective myositis.
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 M60.009
M60.009 is the ICD-10-CM diagnosis code for infective myositis, unspecified site. It belongs to category M60 (myositis), block M60-M63 (disorders of muscles) 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 M60.00 (infective myositis, unspecified site), M60.009 is specifically for infective myositis, unspecified site. Related codes cover right arm (M60.000), left arm (M60.001), arm (M60.002), right leg (M60.003), left leg (M60.004) and leg (M60.005).
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 557 (Tendonitis, Myositis and Bursitis with MCC, relative weight 1.489) and DRG 558 (Tendonitis, Myositis and Bursitis without MCC, relative weight 0.8875), 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 is an unspecified code for which a more specific option (often laterality) exists, and the Medicare Code Editor flags it for review on inpatient claims.
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 040.81 (tropical pyomyositis) and 728.0 (infective myositis).
Notes that apply from higher levels
Instructions written at a parent level also apply to M60.009.
› From M60.0 Infective myositis
› From M60 Myositis
- inclusion body myositis [IBM] (G72.41)
Broader instructions also apply from M60-M63 Disorders of muscles and Chapter 13: Diseases of the musculoskeletal system and connective tissue.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to M60.009.
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 →From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about M60.009
Is M60.009 billable?
- Yes. M60.009 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M60.009 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M60.009 as a principal diagnosis.
Is M60.009 a CC or MCC?
- M60.009 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does M60.009 group to?
- M60.009 is used in the MS-DRG v44.0 logic for MS-DRG 557 (Tendonitis, Myositis and Bursitis with MCC) and MS-DRG 558 (Tendonitis, Myositis and Bursitis without 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 M60.009?
- The CMS General Equivalence Mappings map M60.009 to ICD-9-CM 040.81 and 728.0.