2026 ICD-10-CM Diagnosis Code N73.6Female pelvic peritoneal adhesions (postinfective)

ICD-10-CM Codes›N00–N99›N70-N77›N73

ICD-10-CM N73.6
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N73.6 is a billable ICD-10-CM diagnosis code for female pelvic peritoneal adhesions (postinfective). It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 742 through 743, 760 through 761. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Inflammatory diseases of female pelvic organs.

Code Identity

ICD-10-CM Code
N73.6
Billable Status
Yes — Valid for Submission
Code Describes
Female pelvic peritoneal adhesions (postinfective)
Short Description
Female pelvic peritoneal adhesions (postinfective)
Same as the full description in the CMS dataset.
Parent Code
N73
Other female pelvic inflammatory diseases

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN70-N77Inflammatory diseases of female pelvic organs
CategoryN73Other female pelvic inflammatory diseases
This CodeN73.6Female pelvic peritoneal adhesions (postinfective)

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Adhesion of pelvic peritoneum
  • Adhesion of pelvis
  • Adhesions due to endometriosis
  • Adhesions of rectovaginal pouch due to endometriosis
  • Adhesions of uterus
  • Adnexal adhesions due to endometriosis
  • Dense adhesions of rectovaginal pouch due to endometriosis
  • Dense adnexal adhesions due to endometriosis
  • Female infertility due to pelvic peritoneal adhesion
  • Female pelvic peritoneal adhesions
  • Filmy adhesions of rectovaginal pouch due to endometriosis
  • Filmy uterine adnexal adhesions due to endometriosis
  • Fimbrial adhesions
  • Paraovarian adhesion
  • Peritubal adhesions
  • Tubo-ovarian adhesions

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 2 Excludes

  • postprocedural pelvic peritoneal adhesions N99.4

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.

    • Adhesions, adhesive(postinfective)
      • female pelvis
    • Adhesions, adhesive(postinfective)
      • ovary
    • Adhesions, adhesive(postinfective)
      • paraovarian
    • Adhesions, adhesive(postinfective)
      • pelvic (peritoneal)
        • female
    • Adhesions, adhesive(postinfective)
      • pelvic (peritoneal)
        • postpartal (old)
    • Adhesions, adhesive(postinfective)
      • periovarian
    • Adhesions, adhesive(postinfective)
      • peritoneum, peritoneal (postinfective)
        • pelvic, female
    • Adhesions, adhesive(postinfective)
      • peritoneum, peritoneal (postinfective)
        • postpartal, pelvic
    • Adhesions, adhesive(postinfective)
      • peritoneum, peritoneal (postinfective)
        • to uterus
    • Adhesions, adhesive(postinfective)
      • peritubal
    • Adhesions, adhesive(postinfective)
      • periuterine
    • Adhesions, adhesive(postinfective)
      • tubo-ovarian
    • Adhesions, adhesive(postinfective)
      • uterus
    • Adhesions, adhesive(postinfective)
      • uterus
        • to abdominal wall
    • Band(s)
      • uterus
    • Peritonitis(adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion)
      • pelvic
        • female
          • chronic
            • with adhesions

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

Patient EducationClinical

Adhesions

Adhesions are bands of scar-like tissue. Normally, internal tissues and organs have slippery surfaces so they can shift easily as the body moves. Adhesions cause tissues and organs to stick together. They might connect the loops of the intestines to each other, to nearby organs, or to the wall of the abdomen.

Read the full article at MedlinePlus

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

Convert N73.6 to ICD-9-CMHistory

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

ICD-9-CM
614.6 Fem pelvic periton adhes
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About N73.6Overview

Is N73.6 (Other female pelvic inflammatory diseases) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report female pelvic peritoneal adhesions (postinfective) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does N73.6 group to?

When female pelvic peritoneal adhesions (postinfective) is the principal diagnosis on an inpatient stay, it groups to MS-DRG 742, 743, 760, 761, with relative weights from 0.5696 to 1.8348 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of N73.6?

Under the General Equivalence Mappings, female pelvic peritoneal adhesions (postinfective) converts to ICD-9-CM 614.6 (fem pelvic periton adhes). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.