2026 ICD-10-CM Diagnosis Code I83.91Asymptomatic varicose veins of right lower extremity

ICD-10-CM Codes›I00–I99›I80-I89›I83

ICD-10-CM I83.91
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I83.91 is a billable ICD-10-CM diagnosis code for asymptomatic varicose veins of right lower extremity. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 299 through 301. The code is restricted by the Medicare Code Editor to adult patients (age 15 through 124). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Varicose veins of lower extremity.

Code Identity

ICD-10-CM Code
I83.91
Billable Status
Yes — Valid for Submission
Code Describes
Asymptomatic varicose veins of right lower extremity
Short Description
Asymptomatic varicose veins of right lower extremity
Same as the full description in the CMS dataset.
Parent Code
I83.9
Asymptomatic varicose veins of lower extremities

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI80-I89Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
CategoryI83Varicose veins of lower extremities
This CodeI83.91Asymptomatic varicose veins of right lower extremity

Code EditsBilling

Medicare Code Editor checks that affect claim validity for I83.91.

Adult diagnoses
The Medicare Code Editor detects inconsistencies in adult cases by checking a patient's age and any diagnosis on the patient's record. The adult code edits apply to patients age range is 15–124 years inclusive (e.g., senile delirium, mature cataract).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Varicose vein of ankle region
  • Varicose vein of calf
  • Varicose vein of foot
  • Varicose vein of heel
  • Varicose vein of right ankle region
  • Varicose vein of right calf
  • Varicose vein of right foot
  • Varicose vein of right heel
  • Varicose vein of right lower leg
  • Varicose vein of right thigh
  • Varicose vein of thigh
  • Varicose veins of right lower limb

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.

    • Varix(lower limb)
      • leg (asymptomatic)
        • right (asymptomatic)

Clinical ClassificationClinical

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

CCSR CIR035
Varicose veins of lower extremity
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Varicose Veins

Varicose veins are swollen, twisted veins that you can see just under the skin. They usually occur in the legs, but also can form in other parts of the body. Hemorrhoids are a type of varicose vein.

Read the full article at MedlinePlus

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

Convert I83.91 to ICD-9-CMHistory

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

ICD-9-CM
454.9 Asympt varicose veins
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 I83.91Overview

Is I83.91 (Asymptomatic varicose veins of lower extremities) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report asymptomatic varicose veins of right lower extremity on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I83.91 group to?

When asymptomatic varicose veins of right lower extremity is the principal diagnosis on an inpatient stay, it groups to MS-DRG 299, 300, 301, with relative weights from 0.7197 to 1.6327 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can I83.91 be reported for?

The Medicare Code Editor checks asymptomatic varicose veins of right lower extremity against patient demographics: this code is intended for adult patients (age 15 through 124). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of I83.91?

Under the General Equivalence Mappings, asymptomatic varicose veins of right lower extremity converts to ICD-9-CM 454.9 (asympt varicose veins). 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.