O02.1 vs O36.4
O02.1 and O36.4 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.
The official note, declared on O02.1
fetal death (intrauterine) (late) (O36.4)
O02.1
Missed abortion
Billable
- Chapter 15
- Pregnancy, childbirth and the puerperium
- Section
- O00-O08
Use when the record says
- Early fetal death, before completion of 20 weeks of gestation, with retention of dead fetus
Indexed under
- Abortion › missed (complete) (spontaneous)
- Missed › abortion
- Dead › fetus, retained › early pregnancy
- Retention › products of conception › early pregnancy
- Delivery › complicated › by › intrauterine fetal death, early (childbirth) (labor)
O36.4
Maternal care for intrauterine death
Not billable
- Chapter 15
- Pregnancy, childbirth and the puerperium
- Section
- O30-O48
Use when the record says
- Maternal care for intrauterine fetal death NOS
- Maternal care for intrauterine fetal death after completion of 20 weeks of gestation
- Maternal care for late fetal death
- Maternal care for missed delivery
Indexed under
- Dead › fetus, retained
- Delivery › missed (childbirth) (labor)
- Missed › delivery
- Pregnancy › complicated by › death of fetus (single) (uterine)
- Pregnancy › complicated by › intrauterine fetal death (single) (uterine)
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