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O91.12

O91.12: Abscess of breast associated with the puerperium

Billable / specific codeICD-10-CM

O91.12 is a billable, specific ICD-10-CM code for abscess of breast associated with the puerperium. It is valid for submission on a claim.

Check O91.12 with the rest of the claim: free scrubber

Inclusion terms

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

  • Puerperal mammary abscess
  • Puerperal purulent mastitis
  • Puerperal subareolar abscess

Other codes that can never be billed with O91.12

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • N61Inflammatory disorders of breast

Risk adjustment

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

Medicare coverage

O91.12 is named in 1 Medicare coverage policy: 1 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56766Billing and Coding: Incision and Drainage (I&D) of Abscess of Skin, Subcutaneous and Accessory Structures

Alphabetic index entries that lead here

  • Puerperal, puerperium›abscess›breast
  • Puerperal, puerperium›abscess›mammary
  • Puerperal, puerperium›abscess›subareolar
  • Puerperal, puerperium›fistula›breast(due to mastitis)
  • Puerperal, puerperium›mastitis›purulent
  • Suppuration, suppurative›mammary gland›puerperal, postpartum
  • Mastitis›obstetric›purulent›associated with›puerperium

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under O91.1

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.