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M79.A12

M79.A12: Nontraumatic compartment syndrome of left upper extremity

Billable / specific codeICD-10-CMleft

M79.A12 is a billable, specific ICD-10-CM code for nontraumatic compartment syndrome of left upper extremity. It is valid for submission on a claim.

Check M79.A12 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above M79.A12

A category’s note binds every code beneath it.

Written on M79.A: Nontraumatic compartment syndrome

  • compartment syndrome NOS (T79.A-)
  • fibromyalgia (M79.7)
  • nontraumatic ischemic infarction of muscle (M62.2-)
  • traumatic compartment syndrome (T79.A-)

Written on M79: Other and unspecified soft tissue disorders, not elsewhere classified

  • psychogenic rheumatism (F45.8)
  • soft tissue pain, psychogenic (F45.41)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

M79.A12 is named in 12 Medicare coverage policies: 5 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which one applies depends on your Medicare contractor.

  • A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A58883Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under M79.A1

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.