2026 ICD-10-CM Diagnosis Code M62.9Disorder of muscle, unspecified

ICD-10-CM Codes›M00–M99›M60-M63›M62

ICD-10-CM M62.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M62.9 is a billable ICD-10-CM diagnosis code for disorder of muscle, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 557 through 558. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Muscle disorders.

Code Identity

ICD-10-CM Code
M62.9
Billable Status
Yes — Valid for Submission
Code Describes
Disorder of muscle, unspecified
Short Description
Disorder of muscle, unspecified
Same as the full description in the CMS dataset.
Parent Code
M62
Other disorders of muscle

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM60-M63Disorders of muscles
CategoryM62Other disorders of muscle
This CodeM62.9Disorder of muscle, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal muscle function
  • Absent muscle function
  • Decreased muscle function
  • Disorder of muscle
  • Disorder of skeletal muscle
  • Disorder of smooth muscle
  • Lesion of skeletal muscle
  • Muscle, ligament and fascia disorders
  • Pelvic floor dysfunction
  • Truncal muscle weakness

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Disorder(of)
      • muscle

Clinical ClassificationClinical

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

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

Patient EducationClinical

Muscle Disorders

Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis.

Read the full article at MedlinePlus

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

Convert M62.9 to ICD-9-CMHistory

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

ICD-9-CM
728.9 Muscle/ligament dis NOS
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M62.9Overview

Is M62.9 (Other disorders of muscle) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disorder of muscle, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M62.9 group to?

When disorder of muscle, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 557, 558, with relative weights from 0.8932 to 1.4869 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M62.9?

Under the General Equivalence Mappings, disorder of muscle, unspecified converts to ICD-9-CM 728.9 (muscle/ligament dis NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.