O86.4 — Pyrexia of unknown origin following delivery
O86.4 is a billable, specific ICD-10-CM code for pyrexia of unknown origin following delivery. It is valid for submission on a claim.
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
- pyrexia during labor (O75.2)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Puerperal infection NOS following delivery
- Puerperal pyrexia NOS following delivery
Other codes that can never be billed with O86.4
These codes carry an Excludes1 note pointing at O86.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O86.4 alone.
Risk adjustment
O86.4 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
How O86.4 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to O86.4.
- Fever›following delivery
- Fever›puerperal
- Infection, infected, infective›puerperal
- Puerperal, puerperium›fever(of unknown origin)
- Puerperal, puerperium›infection
- Puerperal, puerperium›pyrexia(of unknown origin)
- Pyrexia›puerperal
- Infection, infected, infective›puerperal›minor
Related codes at this level
Codes that share O86. If O86.4 is not quite right, the correct code is usually one of these.
Questions about O86.4
- Is O86.4 a billable ICD-10-CM code?
- Yes. O86.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does O86.4 sit in the tabular list?
- Pregnancy, childbirth and the puerperium (O00-O9A), in the block Complications predominantly related to the puerperium (O85-O92).