2026 ICD-10-CM Diagnosis Code N85.AIsthmocele
ICD-10-CM Codes›N00–N99›N80-N98›N85
- Billable — Valid for Submission
- Not Chronic
N85.A is a billable ICD-10-CM diagnosis code for isthmocele. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 742 through 743, 760 through 761. Coders also document this condition as uterine isthmocele. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified female genital disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Uterine isthmocele
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Isthmocele (non-pregnant state)
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
Type 1 Excludes
- maternal care for cesarean scar defect isthmocele O34.22
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Cesarean delivery, previous, affecting management of pregnancy
- isthmocele (non-pregnant state)
- Cesarean delivery, previous, affecting management of pregnancy
- scar
- defect (non-pregnant state)
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Uterine Diseases
The uterus, or womb, is the place where a fetus grows during pregnancy. Uterine diseases are conditions that affect the uterus. These diseases can be benign (not cancer) or malignant (cancerous). They may affect your menstrual periods, your ability to get pregnant, or the health of your reproductive organs.
The full article covers:
- What are uterine diseases?
- What causes uterine diseases?
- What are the symptoms of uterine diseases?
- How are uterine diseases diagnosed?
- What are the treatments for uterine diseases?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code History & ChangesHistory
Replacement N85.A replaces the following previously assigned code(s):
- N85.8 - Other specified noninflammatory disorders of uterus
Questions About N85.AOverview
Is N85.A (Other noninflammatory disorders of uterus, except cervix) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report isthmocele on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does N85.A group to?
When isthmocele is the principal diagnosis on an inpatient stay, it groups to MS-DRG 742, 743, 760, 761, with relative weights from 0.5696 to 1.8348 depending on complications. Higher weights mean higher Medicare reimbursement.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
