O91.11 — Abscess of breast associated with pregnancy
Is O91.11 billable?
No — O91.11 is a non-billable header code. O91.11 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 4 billable codes beneath O91.11.
Billable codes under this header
O91.11 at a glance
| Code | O91.11 |
|---|---|
| Description | Abscess of breast associated with pregnancy |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is O91.11 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to O91.11. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Abscess › gestational mammary (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
- Abscess › gestational subareolar (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
- Gestational › mammary abscess
- Gestational › purulent mastitis
- Gestational › subareolar abscess
- Pregnancy › complicated by › abscess or cellulitis › breast (single) (uterine)
- Mastitis › obstetric › purulent › associated with › pregnancy (acute) (diffuse) (nonpuerperal) (subacute)
Inclusion terms
Alternative wording in documentation that is classified to O91.11.
- Gestational mammary abscess
- Gestational purulent mastitis
- Gestational subareolar abscess
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O91.11 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- supervision of normal pregnancy (Z34.-)
Use additional code — inherited from Chapter 15
Report an additional code alongside O91.11 to fully describe the condition. O91.11 is sequenced first.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Use additional code — inherited from O91
Report an additional code alongside O91.11 to fully describe the condition. O91.11 is sequenced first.
- code to identify infection
Excludes2 — not included here — inherited from Chapter 15
The conditions below are not part of O91.11, but a patient may have both at the same time. When documentation supports it, O91.11 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O85-O92
The conditions below are not part of O91.11, but a patient may have both at the same time. When documentation supports it, O91.11 and the excluded code may both be reported.
What codes fall under O91.11? (4)
How long has O91.11 existed?
O91.11 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.