O86.404 ICD-10-CA code: Pyrexia of unknown origin following delivery, postpartum condition or complication
O86.404 is the ICD-10-CA code for “Pyrexia of unknown origin following delivery, postpartum condition or complication” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
O86.404Pyrexia of unknown origin following delivery, postpartum condition or complication
Short description: PUO foll delivery/postpartum
ICD-10-CA · Canada · Also written O86404
Notes for O86.404
As CIHI prints them, with any note O86.404 takes from the headings above it.
Includes
- • Puerperal infection NOS• Puerperal pyrexia NOSFrom O86.4 Pyrexia of unknown origin following delivery
Use additional code
Add a code for this detail when the note documents it.
- Use additional code (B95-B97) to identify infectious agentFrom O86 Other puerperal infections
Excludes
Conditions classified elsewhere.
- • puerperal fever (O85)From O86.4 Pyrexia of unknown origin following delivery
- Infection during labour (O75.3-)From O86 Other puerperal infections
- Mental and behavioural disorders associated with the puerperium (F53.-)obstetrical tetanus (A34)puerperal osteomalacia (M83.0)From O85-O92 Complications predominantly related to the puerperium
- Certain diseases or injuries complicating pregnancy, childbirth, and the puerperium classified elsewhere:external causes (for mortality) (V,W,X,Y)injury, poisoning and certain other consequences of external causes (S00-T88.1, T88.6-T98)mental and behavioural disorders associated with the puerperium (F53.-)obstetrical tetanus (A34)postpartum necrosis of pituitary gland (E23.0)puerperal osteomalacia (M83.0)supervision of:• high-risk pregnancy (Z35.-)• normal pregnancy (Z34.-)From Chapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
Note
- Categories O88.-, O91.- and O92.- include the listed conditions even if they occur during pregnancy and childbirth.From O85-O92 Complications predominantly related to the puerperium
- The codes included in this chapter are to be used for conditions related to or aggravated by the pregnancy, childbirth or by the puerperium (maternal causes or obstetric causes)From Chapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
Where O86.404 sits
- 1ChapterChapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
- 2Block O85-O92Complications predominantly related to the puerperium
- 3Category O86Other puerperal infections
- 4Subcategory O86.4Pyrexia of unknown origin following delivery
- 5Valid code O86.404Pyrexia of unknown origin following delivery, postpartum condition or complication
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code O86.404 mean?
O86.404 is the ICD-10-CA code for “Pyrexia of unknown origin following delivery, postpartum condition or complication” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is O86.404 in ICD-10-CA?
O86.404 sits under O86.4 Pyrexia of unknown origin following delivery, within O86 Other puerperal infections, within O85-O92 Complications predominantly related to the puerperium, within Chapter 15: Pregnancy, childbirth and the puerperium (O00-O99).
What coding notes apply to O86.404?
ICD-10-CA lists Includes, Excludes, Use additional code, Note notes for O86.404, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.