1. Home
  2. ICD-10-CM Codes
  3. N00–N99
  4. N70-N77
  5. N71
  6. 2025 ICD-10-CM Code N71.9

2025 ICD-10-CM Diagnosis Code N71.9

Inflammatory disease of uterus, unspecified

ICD-10-CM Code:
N71.9
ICD-10 Code for:
Inflammatory disease of uterus, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

N71.9 is a billable diagnosis code used to specify a medical diagnosis of inflammatory disease of uterus, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2024 through September 30, 2025.

Unspecified diagnosis codes like N71.9 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
    • Inflammatory diseases of female pelvic organs
      N70-N77
      • Inflammatory disease of uterus, except cervix
        N71

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.

  • Atrophic endometritis
  • Atrophic endometrium
  • Decidual endometritis
  • Endometritis
  • Endometritis, excluding cervix
  • Endomyometritis
  • Hematometra
  • Hematopyometra
  • Infection of uterus
  • Inflammatory disease of the uterus
  • Myometritis
  • Perimetritis
  • Pyometra
  • Pyometra
  • Uterine abscess
  • Uterine inflammatory diseases excluding the cervix

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.

Inflammatory diseases of female pelvic organs

CCSR Code: GEN018

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.

Clinical Information

  • Hematometra

    blood-filled uterus.

  • Endometritis

    inflammation of the endometrium, usually caused by intrauterine infections. endometritis is the most common cause of postpartum fever.

  • Pyometra

    an accumulation of pus in the uterine cavity (uterus). pyometra generally indicates the presence of infections.

  • Uterus

    the hollow thick-walled muscular organ in the female pelvis. it consists of the fundus which is the site of embryo implantation and fetal development. beyond the isthmus at the perineal end of fundus, is cervix uteri (the neck) opening into vagina. beyond the isthmi at the upper abdominal end of fundus, are the fallopian tubes.

  • Endometrium

    the mucous membrane lining of the uterine cavity that is hormonally responsive during the menstrual cycle and pregnancy. the endometrium undergoes cyclic changes that characterize menstruation. after successful fertilization, it serves to sustain the developing embryo.

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).

Convert N71.9 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.

Uterine inflam dis NOS

ICD-9-CM: 615.9

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


Pelvic Inflammatory Disease

Pelvic inflammatory disease (PID) is an infection and inflammation of the uterus, ovaries, and other female reproductive organs. It causes scarring in these organs. This can lead to infertility, ectopic pregnancy, pelvic pain, abscesses, and other serious problems. PID is the most common preventable cause of infertility in the United States.

Gonorrhea and chlamydia, two sexually transmitted infections (STIs), are the most common causes of PID. Other bacteria can also cause it. You are at greater risk if you:

  • Are sexually active and younger than 25
  • Have more than one sex partner
  • Douche

Some women have no symptoms. Others have pain in the lower abdomen, fever, smelly vaginal discharge, irregular bleeding, and pain during intercourse or urination. Doctors diagnose PID with a physical exam, lab tests, and imaging tests. Antibiotics can cure PID. Early treatment is important. Waiting too long increases the risk of infertility.

NIH: National Institute of Allergy and Infectious Diseases


[Learn More in MedlinePlus]

Code History

  • 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.