ICD-10-CM 2027
ICD-10 code for Charley-horse
From the official ICD-10-CM alphabetic index entry “Charley-horse (quadriceps)”. Page updated September 29, 2026.
About coding Charley-horse
The ICD-10-CM code for Charley-horse is M62.831 (Muscle spasm of calf). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on M62.831.
Within M62.83 (muscle spasm), M62.831 is specifically for muscle spasm of calf. Related codes cover of back (M62.830) and other muscle spasm (M62.838).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 555 (Signs and Symptoms of Musculoskeletal System and Connective Tissue with MCC, relative weight 1.2913) and DRG 556 (Signs and Symptoms of Musculoskeletal System and Connective Tissue without MCC, relative weight 0.8211), 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.
More specific Charley-horse codes (official index)
- traumatic (quadriceps) S76.11 — Strain of quadriceps muscle, fascia and tendon
Common questions about Charley-horse ICD-10 codes
What is the ICD-10 code for Charley-horse?
- M62.831 — Muscle spasm of calf. More specific codes apply when the documentation supports them: S76.11.
What is the ICD-10 code for traumatic charley-horse?
- S76.11 — Strain of quadriceps muscle, fascia and tendon (header code; choose a more specific subcode).
Is M62.831 billable?
- Yes. M62.831 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M62.831 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M62.831 as a principal diagnosis.
Is M62.831 a CC or MCC?
- No. M62.831 is neither a CC nor an MCC under MS-DRG v44.0.