ICD-10-CM 2027
ICD-10 code for isthmocele cesarean delivery
From the official ICD-10-CM alphabetic index entry “Cesarean delivery, previous, affecting management of pregnancy › isthmocele (non-pregnant state)”. Page updated September 29, 2026.
About coding isthmocele cesarean delivery
The ICD-10-CM code for isthmocele cesarean delivery is N85.A (Isthmocele). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on N85.A.
Within N85 (other noninflammatory disorders of uterus, except cervix), N85.A is specifically for isthmocele. Related codes cover endometrial hyperplasia (N85.0), hypertrophy of uterus (N85.2), subinvolution of uterus (N85.3), malposition of uterus (N85.4), inversion of uterus (N85.5), intrauterine synechiae (N85.6), Hematometra (N85.7), other specified noninflammatory disorders of uterus (N85.8) and 1 more.
Don't report N85.A together with the conditions in its Excludes1 note: maternal care for cesarean scar defect (isthmocele) (O34.22).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific isthmocele cesarean delivery codes (official index)
- maternal care for O34.22 — Maternal care for cesarean scar defect (isthmocele)
Don't confuse with (Excludes1 for N85.A)
- maternal care for cesarean scar defect (isthmocele) (O34.22)
Common questions about isthmocele cesarean delivery ICD-10 codes
What is the ICD-10 code for isthmocele cesarean delivery?
- N85.A — Isthmocele. More specific codes apply when the documentation supports them: O34.22.
What is the ICD-10 code for maternal care for isthmocele cesarean delivery?
- O34.22 — Maternal care for cesarean scar defect (isthmocele).
Is N85.A billable?
- Yes. N85.A is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N85.A be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N85.A as a principal diagnosis.
Is N85.A a CC or MCC?
- No. N85.A is neither a CC nor an MCC under MS-DRG v44.0.