2026 ICD-10-CM Diagnosis Code K62.6Ulcer of anus and rectum

ICD-10-CM Codes›K00–K95›K55-K64›K62

ICD-10-CM K62.6
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K62.6 is a billable ICD-10-CM diagnosis code for ulcer of anus and rectum. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 393 through 395. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Anal and rectal conditions.

Code Identity

ICD-10-CM Code
K62.6
Billable Status
Yes — Valid for Submission
Code Describes
Ulcer of anus and rectum
Short Description
Ulcer of anus and rectum
Same as the full description in the CMS dataset.
Parent Code
K62
Other diseases of anus and rectum

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK55-K64Other diseases of intestines
CategoryK62Other diseases of anus and rectum
This CodeK62.6Ulcer of anus and rectum

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute hemorrhagic ulcer of rectum
  • Amebic perianal ulceration
  • Anogenital ulceration due to Behcet disease
  • Bleeding ulcer of large intestine
  • Drug induced anal ulceration
  • Perianal amebiasis
  • Solitary rectal ulcer syndrome
  • Stercoral ulcer of anus
  • Stercoral ulcer of large intestine
  • Stercoral ulcer of rectum
  • Ulcer of anorectal structure
  • Ulcer of anus
  • Ulcer of rectal mucosa
  • Ulcer of rectum

Tabular List NotesGuidance

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

Inclusion Terms

  • Solitary ulcer of anus and rectum
  • Stercoral ulcer of anus and rectum

Type 1 Excludes

  • fissure and fistula of anus and rectum K60
  • ulcerative colitis K51

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.

    • Stercoraceous, stercoral ulcer
      • anus or rectum
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • anorectal
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • anus (sphincter) (solitary)
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • intestine, intestinal
        • rectum
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • rectum (sphincter) (solitary)
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • rectum (sphincter) (solitary)
        • stercoraceous, stercoral
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • solitary, anus or rectum (sphincter)
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • stercoraceous, stercoral
        • anus or rectum

Clinical ClassificationClinical

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

CCSR DIG015
Anal and rectal conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Anal Disorders

Your anus is the opening at the end of your large intestine. It is where stool (poop) leaves your body.

The full article covers:

  • What is the anus?
  • What are anal disorders?
  • What are the symptoms of anal disorders?
  • How are anal disorders diagnosed?
  • How are anal disorders treated?

Read the full article at MedlinePlus

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

Convert K62.6 to ICD-9-CMHistory

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

ICD-9-CM
569.41 Rectal & anal ulcer
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 K62.6Overview

Is K62.6 (Other diseases of anus and rectum) a billable code?

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

What MS-DRG does K62.6 group to?

When ulcer of anus and rectum is the principal diagnosis on an inpatient stay, it groups to MS-DRG 393, 394, 395, with relative weights from 0.6490 to 1.5993 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K62.6?

Under the General Equivalence Mappings, ulcer of anus and rectum converts to ICD-9-CM 569.41 (rectal & anal ulcer). The mapping is a direct match.

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.