O86.4

ICD-10Billable

Pyrexia of unknown origin following delivery

Official ICD-10-CM descriptor (FY2026)

Pyrexia of unknown origin following delivery

O86.4 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

Puerperal infection NOS following delivery
Puerperal pyrexia NOS following delivery

Excludes2

Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.

pyrexia during labor (O75.2)

Related codes in O86

Where this code sits

Chapter: 15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block: Complications predominantly related to the puerperium (O85-O92)
Parent code: O86

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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.