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M27.40

M27.40: Unspecified cyst of jaw

Billable / specific codeICD-10-CM

M27.40 is a billable, specific ICD-10-CM code for unspecified cyst of jaw. It is valid for submission on a claim.

Check M27.40 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Cyst of jaw NOS

Excludes1 inherited from the categories above M27.40

A category’s note binds every code beneath it.

Written on M27.4: Other and unspecified cysts of jaw

  • cysts of oral region (K09.-)
  • latent bone cyst of jaw (M27.0)
  • Stafne's cyst (M27.0)

Risk adjustment

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

Medicare coverage

M27.40 is named in 8 Medicare coverage policies: 1 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

Alphabetic index entries that lead here

  • Cyst›alveolar process(jaw bone)
  • Cyst›jaw(bone)
  • Cyst›mandible
  • Cyst›maxilla
  • Cyst›solitary›jaw
  • Cyst›bone NEC›specified type NEC›jaw

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under M27.4

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.