2026 ICD-10-CM Diagnosis Code O86.12Endometritis following delivery

ICD-10-CM Codes›O00-O9A›O85-O92›O86

ICD-10-CM O86.12
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O86.12 is a billable ICD-10-CM diagnosis code for endometritis following delivery. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). Coders also document this condition as puerperal endometritis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complications specified during the puerperium.

Code Identity

ICD-10-CM Code
O86.12
Billable Status
Yes — Valid for Submission
Code Describes
Endometritis following delivery
Short Description
Endometritis following delivery
Same as the full description in the CMS dataset.
Parent Code
O86.1
Other infection of genital tract following delivery

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO85-O92Complications predominantly related to the puerperium
CategoryO86Other puerperal infections
This CodeO86.12Endometritis following delivery

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O86.12.

Maternity diagnoses
The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Puerperal endometritis

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.

    • Endometritis(decidual) (nonspecific) (purulent) (senile) (atrophic) (suppurative)
      • puerperal, postpartum, childbirth
    • Pregnancy(single) (uterine)
      • complicated by (care of) (management affected by)
        • endometritis
    • Puerperal, puerperium(complicated by, complications)
      • abscess
        • uterus
    • Puerperal, puerperium(complicated by, complications)
      • perimetritis
    • Puerperal, puerperium(complicated by, complications)
      • pyometra

Clinical ClassificationClinical

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

CCSR PRG027
Complications specified during the puerperium
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Postpartum Care

Taking home a new baby is one of the happiest times in a woman's life. But it also presents both physical and emotional challenges. :

Read the full article at MedlinePlus

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

Convert O86.12 to ICD-9-CMHistory

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

ICD-9-CM
670.12 Puerp endomet del w p/p
Approximate The match is approximate rather than exact.
ICD-9-CM
670.14 Puerp endomet-postpart
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O86.12Overview

Is O86.12 (Other infection of genital tract following delivery) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report endometritis following delivery on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Who can O86.12 be reported for?

The Medicare Code Editor checks endometritis following delivery against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of O86.12?

Under the General Equivalence Mappings, endometritis following delivery converts to ICD-9-CM 670.12 (puerp endomet del w p/p) and 670.14 (puerp endomet-postpart). The mapping is approximate, so confirm the match fits the documentation.

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.