ICD-10-CM 2027
ICD-10 code for fever puerperal
Pyrexia of unknown origin following delivery
From the official ICD-10-CM alphabetic index entry “Puerperal, puerperium (complicated by, complications) › fever (of unknown origin)”. Page updated September 29, 2026.
About coding fever puerperal
The ICD-10-CM code for fever puerperal is O86.4 (Pyrexia of unknown origin following delivery). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on O86.4.
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.
More specific fever puerperal codes (official index)
- septic O85 — Puerperal sepsis
Common questions about fever puerperal ICD-10 codes
What is the ICD-10 code for fever puerperal?
- O86.4 — Pyrexia of unknown origin following delivery. More specific codes apply when the documentation supports them: O85.
What is the ICD-10 code for septic fever puerperal?
- O85 — Puerperal sepsis.
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.