2026 ICD-10-CM Diagnosis Code I73.01Raynaud's syndrome with gangrene

ICD-10-CM Codes›I00–I99›I70-I79›I73

ICD-10-CM I73.01
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I73.01 is a billable ICD-10-CM diagnosis code for Raynaud's syndrome with gangrene. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 545 through 547. Coders also document this condition as gangrene due to Raynaud disease. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gangrene and Peripheral and visceral vascular disease.

Code Identity

ICD-10-CM Code
I73.01
Billable Status
Yes — Valid for Submission
Code Describes
Raynaud's syndrome with gangrene
Short Description
Raynaud's syndrome with gangrene
Same as the full description in the CMS dataset.
Parent Code
I73.0
Raynaud's syndrome

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI70-I79Diseases of arteries, arterioles and capillaries
CategoryI73Other peripheral vascular diseases
This CodeI73.01Raynaud's syndrome with gangrene

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Gangrene due to Raynaud disease
  • Gangrene due to secondary Raynaud phenomenon

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.

    • Asphyxia, asphyxiation(by)
      • local
        • with gangrene
    • Cyanosis
      • paroxysmal digital
        • with gangrene
    • Gangrene, gangrenous(connective tissue) (dropsical) (dry) (moist) (skin) (ulcer)
      • Raynaud's (symmetric gangrene)
    • Gangrene, gangrenous(connective tissue) (dropsical) (dry) (moist) (skin) (ulcer)
      • symmetrical
    • Phenomenon
      • Raynaud's (secondary)
        • with gangrene
    • Raynaud's disease, phenomenon or syndrome(secondary)
      • with gangrene (symmetric)
    • Syndrome
      • Raynaud's
        • with gangrene

Clinical ClassificationClinical

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

CCSR CIR028
Gangrene
Default principal diagnosis: inpatient No · outpatient No
CCSR CIR026
Peripheral and visceral vascular disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Gangrene

Gangrene is the death of tissues in your body. It happens when a part of your body loses its blood supply. Gangrene can happen on the surface of the body, such as on the skin, or inside the body, in muscles or organs. Causes include:

Read the full article at MedlinePlus

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

Convert I73.01 to ICD-9-CMHistory

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

ICD-9-CM
443.0 Raynaud's syndrome
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
785.4 Gangrene
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.

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 I73.01Overview

Is I73.01 (Raynaud's syndrome) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report Raynaud's syndrome with gangrene on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I73.01 group to?

When Raynaud's syndrome with gangrene is the principal diagnosis on an inpatient stay, it groups to MS-DRG 545, 546, 547, with relative weights from 0.8362 to 2.4817 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of I73.01?

Under the General Equivalence Mappings, Raynaud's syndrome with gangrene converts to ICD-9-CM 443.0 (Raynaud's syndrome) and 785.4 (gangrene). 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.