ICD-10-CM 2027
ICD-10 code for infection puerperal
Pyrexia of unknown origin following delivery
From the official ICD-10-CM alphabetic index entry “Puerperal, puerperium (complicated by, complications) › infection”. Page updated September 29, 2026.
About coding infection puerperal
The ICD-10-CM code for infection puerperal is O86.4 (Pyrexia of unknown origin following delivery). The official index lists 28 more specific codes, 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 infection puerperal codes (official index)
- cervix O86.11 — Cervicitis following delivery
- generalized O85 — Puerperal sepsis
- genital tract NEC O86.19 — Other infection of genital tract following delivery
- obstetric surgical wound O86.09 — Infection of obstetric surgical wound, other surgical site
- kidney (bacillus coli) O86.21 — Infection of kidney following delivery
- maternal O98.93 — Unspecified maternal infectious and parasitic disease complicating the puerperium
- carrier state NEC O99.835 — Other infection carrier state complicating the puerperium
- gonorrhea O98.23 — Gonorrhea complicating the puerperium
- human immunodeficiency virus (HIV) O98.73 — Human immunodeficiency virus [HIV] disease complicating the puerperium
- protozoal O98.63 — Protozoal diseases complicating the puerperium
- sexually transmitted NEC O98.33 — Other infections with a predominantly sexual mode of transmission complicating the puerperium
- specified NEC O98.83 — Other maternal infectious and parasitic diseases complicating the puerperium
- streptococcus group B (GBS) carrier state O99.825 — Streptococcus B carrier state complicating the puerperium
- syphilis O98.13 — Syphilis complicating the puerperium
- tuberculosis O98.03 — Tuberculosis complicating the puerperium
- viral hepatitis O98.43 — Viral hepatitis complicating the puerperium
- viral NEC O98.53 — Other viral diseases complicating the puerperium
- nipple O91.02 — Infection of nipple associated with the puerperium
- associated with lactation O91.03 — Infection of nipple associated with lactation
- peritoneum O85 — Puerperal sepsis
- renal O86.21 — Infection of kidney following delivery
- specified NEC O86.89 — Other specified puerperal infections
- urinary (asymptomatic) (tract) NEC O86.20 — Urinary tract infection following delivery, unspecified
- bladder O86.22 — Infection of bladder following delivery
- kidney O86.21 — Infection of kidney following delivery
- specified site NEC O86.29 — Other urinary tract infection following delivery
- urethra O86.22 — Infection of bladder following delivery
- vagina O86.13 — Vaginitis following delivery
- vein
Common questions about infection puerperal ICD-10 codes
What is the ICD-10 code for infection puerperal?
- O86.4 — Pyrexia of unknown origin following delivery. More specific codes apply when the documentation supports them: O86.11, O85, O86.19, O86.09 and others below.
What is the ICD-10 code for cervix infection puerperal?
- O86.11 — Cervicitis following delivery.
What is the ICD-10 code for generalized infection puerperal?
- O85 — Puerperal sepsis.
What is the ICD-10 code for genital tract nec infection puerperal?
- O86.19 — Other infection of genital tract following delivery.
What is the ICD-10 code for kidney infection puerperal?
- O86.21 — Infection of kidney following delivery.
What is the ICD-10 code for maternal infection puerperal?
- O98.93 — Unspecified maternal infectious and parasitic disease complicating the puerperium.
What is the ICD-10 code for nipple infection puerperal?
- O91.02 — Infection of nipple associated with the puerperium.
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.