O62.4 vs O66.9
O62.4 and O66.9 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 O62.4
dystocia (fetal) (maternal) NOS (O66.9)
O62.4
Hypertonic, incoordinate, and prolonged uterine contractions
Billable
- Chapter 15
- Pregnancy, childbirth and the puerperium
- Section
- O60-O77
Use when the record says
- Cervical spasm
- Contraction ring dystocia
- Dyscoordinate labor
- Hour-glass contraction of uterus
- Hypertonic uterine dysfunction
- Incoordinate uterine action
- Tetanic contractions
- Uterine dystocia NOS
Indexed under
- Bandl's ring, complicating delivery (contraction)
- Constriction › ring dystocia
- Contraction, contracture, contracted › ring (s)
- Dystocia › contraction ring
- Dystocia › uterine NEC
O66.9
Obstructed labor, unspecified
BillableUnspecified
- Chapter 15
- Pregnancy, childbirth and the puerperium
- Section
- O60-O77
Use when the record says
- Dystocia NOS
- Fetal dystocia NOS
- Maternal dystocia NOS
Indexed under
- Dystocia
- Dystocia › fetal
- Dystocia › maternal
- Delay, delayed › any plane in pelvis › complicating delivery
- Delivery › complicated › by › obstructed labor › due to › dystocia (childbirth) (labor)
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