O86.4 – Pyrexia of unknown origin following delivery

ICD-10-CM 2027 diagnosis code · Complications predominantly related to the puerperium

Billable code

ICD-10-CM code O86.4

Code: O86.4 (claims format: O864)
Description: Pyrexia of unknown origin following delivery
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block: O85-O92 Complications predominantly related to the puerperium
Parent codes: O86

Notes for O86.4

Applicable to:

Puerperal infection NOS following delivery
Puerperal pyrexia NOS following delivery

Excludes2 (not included here):

pyrexia during labor (O75.2)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

O86 – Other puerperal infections

Excludes2 (not included here):

infection during labor (O75.3)
obstetrical tetanus (A34)

Use additional code:

code (B95-B97), to identify infectious agent

Block O85-O92

Excludes2 (not included here):

mental and behavioral disorders associated with the puerperium (F53.-)
obstetrical tetanus (A34)
puerperal osteomalacia (M83.0)

Index terms for O86.4

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in O86

Frequently asked questions

What is ICD-10 code O86.4?

O86.4 is the ICD-10-CM code for pyrexia of unknown origin following delivery, in the block O85-O92 (Complications predominantly related to the puerperium).

Is O86.4 a billable code?

Yes. O86.4 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does O86.4 belong to?

It belongs to category O86 – Other puerperal infections.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.