O90.4 vs R34
O90.4 (Postpartum acute kidney failure) compared with R34 (Anuria and oliguria), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. O90.4 carries an Excludes1 note covering R34: “anuria and oliguria (R34)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| O90.4Postpartum acute kidney failure | R34Anuria and oliguria | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Postpartum acute kidney failure is a non-billable ICD-10-CM category code (O90.4). | Anuria and oliguria is a billable ICD-10-CM diagnosis code (R34). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources