2027 ICD-10-CM Diagnosis Code N71.9Inflammatory disease of uterus, unspecified

ICD-10-CM Codes›N00–N99›N70-N77›N71

ICD-10-CM N71.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

N71.9 is a billable ICD-10-CM diagnosis code for inflammatory disease of uterus, 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, 757 through 759. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Inflammatory diseases of female pelvic organs.

Code Identity

ICD-10-CM Code
N71.9
Billable Status
Yes — Valid for Submission
Code Describes
Inflammatory disease of uterus, unspecified
Short Description
Inflammatory disease of uterus, unspecified
Same as the full description in the CMS dataset.
Parent Code
N71
Inflammatory disease of uterus, except cervix

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN70-N77Inflammatory diseases of female pelvic organs
CategoryN71Inflammatory disease of uterus, except cervix
This CodeN71.9Inflammatory disease of uterus, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N71.9: its own notes plus those printed at N71, block N70-N77, and Chapter 14. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From N71 Inflammatory disease of uterus, except cervix applies to 3 codes
  • endo (myo) metritis
  • metritis
  • myometritis
  • pyometra
  • uterine abscess

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From N71 Inflammatory disease of uterus, except cervix applies to 3 codes
  • hyperplastic endometritis (N85.0-)
  • infection of uterus following delivery (O85, O86.-)
From Block N70-N77 Inflammatory diseases of female pelvic organs applies to 39 codes
  • inflammatory diseases of female pelvic organs complicating:
  • abortion or ectopic or molar pregnancy (O00-O07, O08.0)
  • pregnancy, childbirth and the puerperium (O23.-, O75.3, O85, O86.-)

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.

From Chapter 14 (N00-N99) Diseases of the genitourinary system applies to 838 codes
  • 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)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From N71 Inflammatory disease of uterus, except cervix applies to 3 codes
  • code (B95-B97), to identify infectious agent

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From Block N70-N77 Inflammatory diseases of female pelvic organs applies to 39 codes
  • if applicable, pelvic abscess (K6A.0-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name N71.9, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming N71.9: they are not reported together with it, unless the two conditions are unrelated.

  • N85 Other noninflammatory disorders of uterus, except cervix
    inflammatory diseases of uterus (N71.-) names N71.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR GEN018
Inflammatory diseases of female pelvic organs
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Endometritis

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

Patient EducationClinical

Pelvic Inflammatory Disease

Pelvic inflammatory disease (PID) is an infection of the uterus, ovaries, and other female reproductive organs. PID causes scarring in these organs. This can lead to infertility, ectopic pregnancy, pelvic pain, abscesses (a collection of pus), and other serious problems.

The full article covers:

  • What is pelvic inflammatory disease?
  • What causes pelvic inflammatory disease?
  • What are the symptoms of pelvic inflammatory disease?
  • How is pelvic inflammatory disease diagnosed?
  • What is the treatment for pelvic inflammatory disease?
  • Can pelvic inflammatory disease be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert N71.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
615.9 Uterine inflam dis NOS
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About N71.9Overview

What is the ICD-10 code for inflammatory disease of uterus, unspecified?

The ICD-10-CM code for inflammatory disease of uterus, unspecified is N71.9 (sometimes written as N719). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is N71.9 (Inflammatory disease of uterus, except cervix) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report inflammatory disease of uterus, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does N71.9 group to?

When inflammatory disease of uterus, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 742, 759, 743, 758, 757, with relative weights from 0.7687 to 1.8448 depending on complications. Higher weights mean higher Medicare reimbursement.

Can N71.9 be reported with a code from N85.0?

Not as a rule. The Excludes1 note at N71, which applies to N71.9, lists "hyperplastic endometritis (N85.0-)". 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).

Does N71.9 need an additional code?

When the condition applies, yes. The Use Additional Code note at N71, which applies to N71.9, reads: code (B95-B97), to identify infectious agent. The additional code is reported after N71.9.