2027 ICD-10-CM Diagnosis Code N85.00Endometrial hyperplasia, unspecified
ICD-10-CM Codes›N00–N99›N80-N98›N85
- Billable — Valid for Submission
- Chronic Condition
N85.00 is a billable ICD-10-CM diagnosis code for endometrial hyperplasia, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 742 through 743, 760 through 761. Coders also document this condition as abnormal uterine bleeding due to endometrial disorder. 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.
- Abnormal uterine bleeding due to endometrial disorder
- Abnormal uterine bleeding due to endometrial hyperplasia
- Endometrial cystic hyperplasia
- Endometrial hyperplasia
- Hypoplasia of endometrium
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N85.00: its own notes plus those printed at N85 and Chapter 14. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Hyperplasia (adenomatous) (cystic) (glandular) of endometrium
- Hyperplastic endometritis
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- 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)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name N85.00, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming N85.00: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Atypical, atypism See Also: condition;
hyperplasia N85.00
Endometritis (decidual) (nonspecific) (purulent) (senile) (atrophic) (suppurative) N71.9
hyperplastic See Also: Hyperplasia, endometrial; N85.00
endometrium, endometrial (adenomatous) (cystic) (glandular) (glandular-cystic) (polypoid) N85.00
glandularis cystica uteri (interstitialis) See Also: Hyperplasia, endometrial; N85.00
endometrium (glandular) See Also: Hyperplasia, endometrial; N85.00
endometrium (glandular) See Also: Hyperplasia, endometrial; N85.00
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Endometrial Hyperplasia
benign proliferation of the endometrium in the uterus. endometrial hyperplasia is classified by its cytology and glandular tissue. there are simple, complex (adenomatous without atypia), and atypical hyperplasia representing also the ascending risk of becoming malignant.
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.
Convert N85.00 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N85.00Overview
What is the ICD-10 code for endometrial hyperplasia, unspecified?
The ICD-10-CM code for endometrial hyperplasia, unspecified is N85.00 (sometimes written as N8500). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is N85.00 (Endometrial hyperplasia) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report endometrial hyperplasia, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does N85.00 group to?
When endometrial hyperplasia, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 742, 743, 760, 761, with relative weights from 0.7039 to 1.8448 depending on complications. Higher weights mean higher Medicare reimbursement.
Can N85.00 be reported with a code from N80?
Not as a rule. The Excludes1 note at N85, which applies to N85.00, lists "endometriosis (N80.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of N85.00?
Under the General Equivalence Mappings, endometrial hyperplasia, unspecified converts to ICD-9-CM 621.30 (endometrial hyperpla NOS). The mapping is a direct match.
