O08.4 vs R34
O08.4 and R34 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
O08.4
Renal failure following ectopic and molar pregnancy
Billable
- Chapter 15
- Pregnancy, childbirth and the puerperium
- Section
- O00-O08
Use when the record says
- Kidney failure (acute) following ectopic and molar pregnancy
- Oliguria following ectopic and molar pregnancy
- Renal shutdown following ectopic and molar pregnancy
- Renal tubular necrosis following ectopic and molar pregnancy
- Uremia following ectopic and molar pregnancy
Indexed under
- Oliguria › with, complicating or following ectopic or molar pregnancy
- Uremia, uremic › following ectopic or molar pregnancy
- Anuria › following › ectopic or molar pregnancy
- Complication › ectopic pregnancy › renal failure (s) (from) (of)
- Complication › molar pregnancy NOS › renal failure (s) (from) (of)
R34
Anuria and oliguria
Billable
- Chapter 18
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- Section
- R30-R39
Indexed under
- Anuria
- Ischuria
- Oliguria
- Urodialysis
- Suppression › urine, urinary secretion
These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027