2026 ICD-10-CM Diagnosis Code K64.4Residual hemorrhoidal skin tags

ICD-10-CM Codes›K00–K95›K55-K64›K64

ICD-10-CM K64.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K64.4 is a billable ICD-10-CM diagnosis code for residual hemorrhoidal skin tags. 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 Hemorrhoids.

Code Identity

ICD-10-CM Code
K64.4
Billable Status
Yes — Valid for Submission
Code Describes
Residual hemorrhoidal skin tags
Short Description
Residual hemorrhoidal skin tags
Same as the full description in the CMS dataset.
Parent Code
K64
Hemorrhoids and perianal venous thrombosis

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK55-K64Other diseases of intestines
CategoryK64Hemorrhoids and perianal venous thrombosis
This CodeK64.4Residual hemorrhoidal skin tags

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anal polyp
  • Anal skin tag
  • Benign neoplasm of anus
  • Benign neoplasm of perianal skin
  • Bleeding external hemorrhoids
  • Bleeding hemorrhoids
  • External hemorrhoids
  • Obstruction of visceral vein
  • Perianal skin tags
  • Prolapsed external hemorrhoids
  • Residual hemorrhoidal skin tags
  • Sentinel pile
  • Sentinel tag
  • Strangulated external hemorrhoids
  • Strangulated hemorrhoids
  • Ulcer of anus
  • Ulcerated external hemorrhoids
  • Ulcerated hemorrhoids

Tabular List NotesGuidance

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

Inclusion Terms

  • External hemorrhoids, NOS
  • Skin tags of anus

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.

    • Hemorrhoids(bleeding) (without mention of degree)
      • external
    • Hemorrhoids(bleeding) (without mention of degree)
      • skin tags
        • anus
    • Hemorrhoids(bleeding) (without mention of degree)
      • skin tags
        • residual
    • Tag(hypertrophied skin) (infected)
      • anus
    • Tag(hypertrophied skin) (infected)
      • hemorrhoidal
    • Tag(hypertrophied skin) (infected)
      • sentinel
    • Tag(hypertrophied skin) (infected)
      • skin
        • anus

Clinical ClassificationClinical

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

CCSR DIG014
Hemorrhoids
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Hemorrhoids

Hemorrhoids are swollen, inflamed veins around your anus or the lower part of your rectum. There are two types:

The full article covers:

  • What are hemorrhoids?
  • What causes hemorrhoids?
  • What are the symptoms of hemorrhoids?
  • How can I treat hemorrhoids at home?
  • When do I need to see a health care provider for hemorrhoids?
  • How are hemorrhoids diagnosed?
  • What are the treatments for hemorrhoids?
  • Can hemorrhoids be prevented?

Read the full article at MedlinePlus

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

Convert K64.4 to ICD-9-CMHistory

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

ICD-9-CM
455.3 Ext hemorrhoid w/o compl
Approximate The match is approximate rather than exact.
ICD-9-CM
455.9 Residual hemorrhoid tags
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 K64.4Overview

Is K64.4 (Hemorrhoids and perianal venous thrombosis) a billable code?

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

What MS-DRG does K64.4 group to?

When residual hemorrhoidal skin tags 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 K64.4?

Under the General Equivalence Mappings, residual hemorrhoidal skin tags converts to ICD-9-CM 455.3 (ext hemorrhoid w/o compl) and 455.9 (residual hemorrhoid tags). The mapping is approximate, so confirm the match fits the documentation.

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.