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Q83.1

Q83.1: Accessory breast

Billable / specific codeICD-10-CMPOA exempt

Q83.1 is a billable, specific ICD-10-CM code for accessory breast. It is valid for submission on a claim.

Check Q83.1 with the rest of the claim: free scrubber

Inclusion terms

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

  • Supernumerary breast

Excludes2 inherited from the categories above Q83.1

Not part of this code, but both may be coded when both are present.

Written on Q83: Congenital malformations of breast

Risk adjustment

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

Alphabetic index entries that lead here

  • Polymastia
  • Accessory›breast tissue, axilla
  • Axilla, axillary›breast
  • Supernumerary›breast

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Q83

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.