2027 ICD-10-CM Diagnosis Code M62.831Muscle spasm of calf

ICD-10-CM Codes›M00–M99›M60-M63›M62

ICD-10-CM M62.831
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M62.831 is a billable ICD-10-CM diagnosis code for muscle spasm of calf. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 555 through 556. Coders also document this condition as bilateral spasm of muscle of calves. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Muscle disorders.

Code Identity

ICD-10-CM Code
M62.831
Billable Status
Yes — Valid for Submission
Code Describes
Muscle spasm of calf
Short Description
Muscle spasm of calf
Same as the full description in the CMS dataset.
Parent Code
M62.83
Muscle spasm

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM60-M63Disorders of muscles
CategoryM62Other disorders of muscle
This CodeM62.831Muscle spasm of calf

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral spasm of muscle of calves
  • Cramp in calf
  • Cramp in lower leg
  • Cramp in lower limb
  • Spasm of muscle of left calf
  • Spasm of muscle of right calf

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M62.831: its own notes plus those printed at M62.8, M62, block M60-M63, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Charley-horse

Excludes1

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

From M62 Other disorders of muscle applies to 131 codes
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 M62.8 Other specified disorders of muscle applies to 8 codes
  • nontraumatic hematoma of muscle (M79.81)
From M62 Other disorders of muscle applies to 131 codes
  • nontraumatic hematoma of muscle (M79.81)
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)

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 M62.831, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming M62.831: its condition is not part of those codes, and both may be reported when the patient has both.

  • R25.2 Cramp and spasm
    charley-horse (M62.831)
  • R25.2 Cramp and spasm
    muscle spasm of calf (M62.831)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to 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

  • Spasm

    an involuntary contraction of a muscle or group of muscles. spasms may involve skeletal muscle or smooth muscle.

Patient EducationClinical

Neuromuscular Disorders

Neuromuscular disorders affect your neuromuscular system. They can cause problems with:

Read the full article at MedlinePlus

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

Convert M62.831 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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M62.831Overview

What is the ICD-10 code for muscle spasm of calf?

The ICD-10-CM code for muscle spasm of calf is M62.831 (sometimes written as M62831). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is M62.831 (Muscle spasm) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report muscle spasm of calf on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does M62.831 group to?

When muscle spasm of calf is the principal diagnosis on an inpatient stay, it groups to MS-DRG 555, 556, with relative weights from 0.8210 to 1.2908 depending on complications. Higher weights mean higher Medicare reimbursement.

Can M62.831 be reported with G72.1?

Not as a rule. The Excludes1 note at M62, which applies to M62.831, lists "alcoholic myopathy (G72.1)". 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).

What is the ICD-9 equivalent of M62.831?

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