N85.A
Isthmocele
N85.A (also written N85A) is a billable ICD-10-CM diagnosis code for isthmocele. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 12 codes in category N85 (Other noninflammatory disorders of uterus, except cervix). The Alphabetic Index lists it under 2 entries. Its coding notes include a Code also instruction, 6 Excludes1 entries and 8 Excludes2 entries.
Code also
Two codes may be needed to describe the condition. This note gives no sequencing order.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
- maternal care for cesarean scar defect (isthmocele) (O34.22)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Gastrointestinal tract and Genitourinary system clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Inclusion terms
Conditions classified to this code.
- Isthmocele (non-pregnant state)
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 2 entries