O91

ICD-10Non-billable category

Infect 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.

Use additional code

Report an additional code to identify the associated condition.

code to identify infection

More specific codes under O91

Where this code sits

Chapter: 15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block: Complications predominantly related to the puerperium (O85-O92)

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Source

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.