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  6. 2026 ICD-10-CM Code N85.9

2026 ICD-10-CM Diagnosis Code N85.9

Noninflammatory disorder of uterus, unspecified

ICD-10-CM Code:
N85.9
ICD-10 Code for:
Noninflammatory disorder of uterus, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

N85.9 is a billable diagnosis code used to specify a medical diagnosis of noninflammatory disorder of uterus, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.

Unspecified diagnosis codes like N85.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Code Classification

  • Diseases of the genitourinary system
    N00–N99
    • Noninflammatory disorders of female genital tract
      N80-N98
      • Other noninflammatory disorders of uterus, except cervix
        N85

Approximate Synonyms

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

  • Abnormal uterine bleeding due to endometrial disorder
  • Disorder of uterus
  • Endometrial disorder
  • Lesion of endometrium
  • Lesion of uterus
  • Noninflammatory disorder of uterus
  • Obstetric disorder of uterus
  • Uterine dysfunction
  • Uterus problem

Clinical Classification

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

Other specified female genital disorders

CCSR Code: GEN025

Inpatient Default: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Inclusion Terms

Inclusion Terms
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.
  • Disorder of uterus NOS

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Index of External Cause of Injuries

References found for this diagnosis code in the External Cause of Injuries Index:

    • Atypical, atypism
      • endometrium
    • Disease, diseased
      • uterus (noninflammatory)
    • Lesion(s) (nontraumatic)
      • uterus

Convert N85.9 to ICD-9-CM

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

Disorder of uterus NOS

ICD-9-CM: 621.9

This is a direct match with no additional mapping qualifiers. The absence of a flag generally means the mapping is considered exact or precise. In other words, the ICD-10 code maps cleanly to the ICD-9 code without qualification, approximation, or needing multiple codes.

View Conversion

Patient Education


Uterine Diseases

What are 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.

Some types of uterine diseases include:

  • Adenomyosis. Tissue that usually lines the uterus grows on the outside walls.
  • Cervicitis. Swelling or inflamed tissue of the cervix. The cervix is the lower part of the uterus.
  • Endometrial hyperplasia. An overgrowth of normal cells inside the uterus.
  • Endometriosis. Tissue like the lining of the uterus grows in other places in your body.
  • Uterine prolapse. The uterus drops in to the vagina due to weakened pelvic muscles. This can happen after a few vaginal births, menopause, or because of obesity.

What causes uterine diseases?

Various factors can cause uterine diseases. These can include hormonal imbalances, thyroid problems, fibroids, polyps, cancer, infection, or pregnancy.

What are the symptoms of uterine diseases?

Your symptoms will depend on the type of uterine condition you have. The first sign of a problem with the uterus may be abnormal bleeding. Bleeding could occur between periods, be very heavy, or last much longer than usual. Other symptoms may include bleeding after sex or pelvic pain.

How are uterine diseases diagnosed?

To find out the cause of your symptoms, your health care provider may:

  • Ask about your symptoms and medical history
  • Do a pelvic exam
  • Order blood tests or imaging tests
  • Do a biopsy

What are the treatments for uterine diseases?

Treatment depends on the cause. It may include pain medicine, hormone therapy, or surgery. Your provider will work with you to choose the best treatment.


[Learn More in MedlinePlus]

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

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.