2027 ICD-10-CM Diagnosis Code M60.043Infective myositis, unspecified hand

ICD-10-CM Codes›M00–M99›M60-M63›M60

ICD-10-CM M60.043
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M60.043 is a billable ICD-10-CM diagnosis code for infective myositis, unspecified hand. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 557 through 558. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 222 closely related codes. The code is flagged as an unspecified code, since codes identifying laterality exist in the same family. Coders also document this condition as infective myositis of hand. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Muscle disorders.

Code Identity

ICD-10-CM Code
M60.043
Billable Status
Yes — Valid for Submission
Code Describes
Infective myositis, unspecified hand
Short Description
Infective myositis, unspecified hand
Same as the full description in the CMS dataset.
Parent Code
M60.04
Infective myositis, hand and fingers

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM60-M63Disorders of muscles
CategoryM60Myositis
This CodeM60.043Infective myositis, unspecified hand

Code EditsBilling

Medicare Code Editor checks that affect claim validity for M60.043.

Unspecified codes
Unspecified codes exist in the ICD-10-CM classification for circumstances when documentation in the medical record does not provide the level of detail needed to support reporting a more specific code. However, in the inpatient setting, there should generally be very limited and rare circumstances for which the laterality (right, left, bilateral) of a condition is unable to be documented and reported. The following pages contain the list of unspecified ICD-10-CM diagnosis codes for which there is a more specific code to identify laterality (right, left, bilateral) within that code family.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Infective myositis of hand
  • Inflammation of muscle of hand
  • Muscle abscess of hand

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M60.043: its own notes plus those printed at M60.0, M60, block M60-M63, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block M60-M63 Disorders of muscles applies to 420 codes
  • dermatopolymyositis (M33.-)
  • myopathy in amyloidosis (E85.-)
  • myopathy in polyarteritis nodosa (M30.0)
  • myopathy in rheumatoid arthritis (M05.32)
  • myopathy in scleroderma (M34.-)
  • myopathy in Sjögren's syndrome (M35.03)
  • myopathy in systemic lupus erythematosus (M32.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From M60 Myositis applies to 111 codes
  • inclusion body myositis [IBM] (G72.41)
From Block M60-M63 Disorders of muscles applies to 420 codes
  • muscular dystrophies and myopathies (G71-G72)
From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From M60.0 Infective myositis applies to 39 codes
  • code (B95-B97) to identify infectious agent

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M60.043, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming M60.043: they are not reported together with it, unless the two conditions are unrelated.

  • G72 Other and unspecified myopathies
    myositis (M60.-) names M60.-, which includes this code
  • M79.1 Myalgia
    myositis (M60.-) names M60.-, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming M60.043: its condition is not part of those codes, and both may be reported when the patient has both.

  • G71 Primary disorders of muscles
    myositis (M60.-) names M60.-, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MUS026
Muscle disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Infectious Myositis

    an infectious process affecting the skeletal muscles. it can be caused by viruses (including hiv), bacteria, fungi, and parasites. symptoms include muscle weakness and muscle pain.

  • Myositis

    inflammation of a muscle or muscle tissue.

Patient EducationClinical

Myositis

Myositis means inflammation of the muscles that you use to move your body. An injury, infection, or autoimmune disease can cause it. Two specific kinds are polymyositis and dermatomyositis. Polymyositis causes muscle weakness, usually in the muscles closest to the trunk of your body.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert M60.043 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
728.0 Infective myositis
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M60.043Overview

What is the ICD-10 code for infective myositis, unspecified hand?

The ICD-10-CM code for infective myositis, unspecified hand is M60.043 (sometimes written as M60043). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is M60.043 (Infective myositis, hand and fingers) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report infective myositis, unspecified hand on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does M60.043 group to?

When infective myositis, unspecified hand is the principal diagnosis on an inpatient stay, it groups to MS-DRG 557, 558, with relative weights from 0.8873 to 1.4883 depending on complications. Higher weights mean higher Medicare reimbursement.

Is M60.043 a CC or MCC?

CMS lists M60.043 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 222 closely related codes in its exclusion list.

Can M60.043 be reported with a code from M33?

Not as a rule. The Excludes1 note at block M60-M63, which applies to M60.043, lists "dermatopolymyositis (M33.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).