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N85.A

N85.A: Isthmocele

Billable / specific codeICD-10-CM

N85.A is a billable, specific ICD-10-CM code for isthmocele. It is valid for submission on a claim.

Check N85.A with the rest of the claim: free scrubber

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • maternal care for cesarean scar defect (isthmocele) (O34.22)

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

  • 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-)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Isthmocele (non-pregnant state)

Excludes1 inherited from the categories above N85.A

A category’s note binds every code beneath it.

Written on N85: Other noninflammatory disorders of uterus, except cervix

  • endometriosis (N80.-)
  • inflammatory diseases of uterus (N71.-)
  • noninflammatory disorders of cervix, except malposition (N86-N88)
  • polyp of corpus uteri (N84.0)
  • uterine prolapse (N81.-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Cesarean delivery, previous, affecting management of pregnancy›isthmocele(non-pregnant state)
  • Cesarean delivery, previous, affecting management of pregnancy›scar›defect(non-pregnant state)

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under N85

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.