2026 ICD-10-CM Diagnosis Code M62.40Contracture of muscle, unspecified site

ICD-10-CM Codes›M00–M99›M60-M63›M62

ICD-10-CM M62.40
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M62.40 is a billable ICD-10-CM diagnosis code for contracture of muscle, unspecified site. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 555 through 556. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Muscle disorders.

Code Identity

ICD-10-CM Code
M62.40
Billable Status
Yes — Valid for Submission
Code Describes
Contracture of muscle, unspecified site
Short Description
Contracture of muscle, unspecified site
Same as the full description in the CMS dataset.
Parent Code
M62.4
Contracture of muscle

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM60-M63Disorders of muscles
CategoryM62Other disorders of muscle
This CodeM62.40Contracture of muscle, unspecified site

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormally increased muscle contraction
  • Contracture of muscle following injury
  • Contracture of tendon sheath
  • Deformity after injury
  • Extension contracture of muscle
  • Flexion contracture of muscle
  • Hereditary fibrosing poikiloderma, tendon contractures, myopathy, pulmonary fibrosis syndrome
  • Hereditary sclerosing poikiloderma
  • Muscle contracture
  • Short tendon
  • Tendon contracture

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.

    • Contraction(s), contracture, contracted
      • muscle (postinfective) (postural) NEC
    • Contraction(s), contracture, contracted
      • tendon (sheath)

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

Joint Disorders

Your joints are places where two or more bones come together. Your shoulders, elbows, hips, knees, and knuckles are all joints. Your spine has joints, too.

The full article covers:

  • What are joints?
  • What are joint disorders?
  • What diseases can affect the joints?
  • What types of joint disorders happen from sudden injuries?
  • What types of joint disorders happen from overuse?
  • How can I keep my joints healthy?

Read the full article at MedlinePlus

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

Convert M62.40 to ICD-9-CMHistory

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

ICD-9-CM
728.85 Spasm of muscle
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 M62.40Overview

Is M62.40 (Contracture of muscle) a billable code?

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

What MS-DRG does M62.40 group to?

When contracture of muscle, unspecified site is the principal diagnosis on an inpatient stay, it groups to MS-DRG 555, 556, with relative weights from 0.8306 to 1.3218 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M62.40?

Under the General Equivalence Mappings, contracture of muscle, unspecified site converts to ICD-9-CM 728.85 (spasm of muscle). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.