ICD-10-CM 2027
ICD-10 code for puerperal pyrexia
Pyrexia of unknown origin following delivery
From the official ICD-10-CM alphabetic index entry “Pyrexia (of unknown origin) › puerperal”. Page updated September 29, 2026.
About coding puerperal pyrexia
The ICD-10-CM code for puerperal pyrexia is O86.4 (Pyrexia of unknown origin following delivery).
Within O86 (other puerperal infections), O86.4 is specifically for pyrexia of unknown origin following delivery. Related codes cover infection of obstetric surgical wound (O86.0), other infection of genital tract following delivery (O86.1), urinary tract infection following delivery (O86.2) and other specified puerperal infections (O86.8).
The conditions in its Excludes2 note aren't part of O86.4, but may be coded alongside it if the patient has both: pyrexia during labor (O75.2).
Use an additional code (B95-B97), to identify infectious agent.
Common questions about puerperal pyrexia ICD-10 codes
What is the ICD-10 code for puerperal pyrexia?
- O86.4 — Pyrexia of unknown origin following delivery.
Is O86.4 billable?
- Yes. O86.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can O86.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict O86.4 as a principal diagnosis.
Is O86.4 a CC or MCC?
- O86.4 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.