O91
ICD-10Non-billable categoryInfect of breast assoc w pregnancy, the puerp and lactation
Official ICD-10-CM descriptor (FY2026)
Infections of breast associated with pregnancy, the puerperium and lactation
O91 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
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Report an additional code to identify the associated condition.
- code to identify infection
More specific codes under O91
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.