2026 ICD-10-CM Diagnosis Code K22.5Diverticulum of esophagus, acquired

ICD-10-CM Codes›K00–K95›K20-K31›K22

ICD-10-CM K22.5
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K22.5 is a billable ICD-10-CM diagnosis code for diverticulum of esophagus, acquired. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 391 through 392. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Esophageal disorders.

Code Identity

ICD-10-CM Code
K22.5
Billable Status
Yes — Valid for Submission
Code Describes
Diverticulum of esophagus, acquired
Short Description
Diverticulum of esophagus, acquired
Same as the full description in the CMS dataset.
Parent Code
K22
Other diseases of esophagus

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK22Other diseases of esophagus
This CodeK22.5Diverticulum of esophagus, acquired

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired diverticulum of esophagus
  • Acquired esophagocele
  • Acquired pulsion diverticulum of esophagus
  • Acquired supradiaphragmatic diverticulum of esophagus
  • Acquired traction diverticulum of esophagus
  • Esophageal diverticulum
  • Intramural diverticulosis of esophagus
  • Mid-esophageal diverticulum
  • Mid-esophageal pulsion diverticulum
  • Mid-esophageal traction diverticulum
  • Traction esophageal diverticulum
  • Zenker's diverticulum

Tabular List NotesGuidance

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

Inclusion Terms

  • Esophageal pouch, acquired

Type 1 Excludes

  • diverticulum of esophagus congenital Q39.6

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.

    • Diverticulum, diverticula(multiple)
      • epiphrenic (esophagus)
    • Diverticulum, diverticula(multiple)
      • esophagus (congenital)
        • acquired (epiphrenic) (pulsion) (traction)
    • Diverticulum, diverticula(multiple)
      • midthoracic
    • Diverticulum, diverticula(multiple)
      • pharyngoesophageal (congenital)
        • acquired
    • Diverticulum, diverticula(multiple)
      • Rokitansky's
    • Diverticulum, diverticula(multiple)
      • Zenker's (esophagus)
    • Esophagocele
    • Pouch
      • esophagus, esophageal, congenital
        • acquired
    • Zenker's diverticulum(esophagus)

Clinical ClassificationClinical

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

CCSR DIG004
Esophageal disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Esophagus Disorders

The esophagus is the muscular tube that carries food and liquids from your mouth to the stomach. You may not be aware of your esophagus until you swallow something too large, too hot, or too cold. You may also notice it when something is wrong. You may feel pain or have trouble swallowing.

Read the full article at MedlinePlus

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

Convert K22.5 to ICD-9-CMHistory

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

ICD-9-CM
530.6 Acq esophag diverticulum
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 K22.5Overview

Is K22.5 (Other diseases of esophagus) a billable code?

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

What MS-DRG does K22.5 group to?

When diverticulum of esophagus, acquired is the principal diagnosis on an inpatient stay, it groups to MS-DRG 391, 392, with relative weights from 0.7796 to 1.2683 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K22.5?

Under the General Equivalence Mappings, diverticulum of esophagus, acquired converts to ICD-9-CM 530.6 (acq esophag diverticulum). 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.