N85.A is the authoritative medical code for Isthmocele. This classification is used in medical billing and clinical recording to specify the clinical criteria for isthmocele (ICD-10-CM N85.A), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Isthmocele is a billable ICD-10-CM diagnosis code N85.A. Inclusion terms: Isthmocele (non-pregnant state). Excludes1 (not coded here): maternal care for cesarean scar defect isthmocele O34.22; endometriosis N80.-; inflammatory diseases of uterus N71.-; noninflammatory disorders of cervix, except malposition N86-N88; polyp of corpus uteri N84.0; uterine prolapse N81.-. Code also: any associated conditions such as:; abnormal uterine and vaginal bleeding, unspecified N93.9; female infertility of uterine origin N97.2; pelvic and perineal pain R10.2-.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for N85.A in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Isthmocele (non-pregnant state)
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- maternal care for cesarean scar defect isthmocele O34.22
- endometriosis N80.-
- inflammatory diseases of uterus N71.-
- noninflammatory disorders of cervix, except malposition N86-N88
- polyp of corpus uteri N84.0
- uterine prolapse N81.-
Code Also
Additional codes that may be required to fully describe the encounter.
- any associated conditions such as:
- abnormal uterine and vaginal bleeding, unspecified N93.9
- female infertility of uterine origin N97.2
- pelvic and perineal pain R10.2-
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with N85.A?
Per Excludes1 instructions, N85.A must not be reported with: maternal care for cesarean scar defect (isthmocele) (O34.22); endometriosis (N80.-); inflammatory diseases of uterus (N71.-); noninflammatory disorders of cervix, except malposition (N86-N88).
What conditions are included under N85.A?
Isthmocele includes: Isthmocele (non-pregnant state).
Codes in This Family (13)
Official ICD-10-CM classifications in the same code family as N85.A, with their registry titles.
- N85 — Other noninflammatory disorders of uterus, except cervix
- N85.0 — Endometrial hyperplasia
- N85.00 — Endometrial hyperplasia, unspecified
- N85.01 — Benign endometrial hyperplasia
- N85.02 — Endometrial intraepithelial neoplasia [EIN]
- N85.2 — Hypertrophy of uterus
- N85.3 — Subinvolution of uterus
- N85.4 — Malposition of uterus
- N85.5 — Inversion of uterus
- N85.6 — Intrauterine synechiae
- N85.7 — Hematometra
- N85.8 — Other specified noninflammatory disorders of uterus
- N85.9 — Noninflammatory disorder of uterus, unspecified
Indexed Clinical Terms (2)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Cesarean delivery, previous, affecting management of pregnancy, isthmocele (non-pregnant state)
- Cesarean delivery, previous, affecting management of pregnancy, scar, defect (non-pregnant state)
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: