2026 ICD-10-CM Diagnosis Code L98.433Non-pressure chronic ulcer of abdomen with necrosis of muscle

ICD-10-CM Codes›L00–L99›L80-L99›L98

ICD-10-CM L98.433
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L98.433 is a billable ICD-10-CM diagnosis code for non-pressure chronic ulcer of abdomen with necrosis of muscle. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 573 through 575, 592 through 594.

Code Identity

ICD-10-CM Code
L98.433
Billable Status
Yes — Valid for Submission
Code Describes
Non-pressure chronic ulcer of abdomen with necrosis of muscle
Short Description
Non-prs chronic ulcer of abdomen with necrosis of muscle
Parent Code
L98.43
Non-pressure chronic ulcer of abdomen

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL80-L99Other disorders of the skin and subcutaneous tissue
CategoryL98Other disorders of skin and subcutaneous tissue, not elsewhere classified
This CodeL98.433Non-pressure chronic ulcer of abdomen with necrosis of muscle

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.

    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • abdomen
        • with
          • muscle necrosis

Code History & ChangesHistory

New Code L98.433 was added to the ICD-10-CM code set for FY 2026, effective October 1, 2025.

Replacement L98.433 replaces the following previously assigned code(s):

  • L98.493 - Non-prs chronic ulcer of skin of sites w necrosis of muscle
FY 2026AddedAdded to the ICD-10-CM code setEffective October 1, 2025.
FY 2026CurrentRevised in the current code setEffective October 1, 2025 through September 30, 2026.

Questions About L98.433Overview

Is L98.433 (Non-pressure chronic ulcer of abdomen) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report non-pressure chronic ulcer of abdomen with necrosis of muscle on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L98.433 group to?

When non-pressure chronic ulcer of abdomen with necrosis of muscle is the principal diagnosis on an inpatient stay, it groups to MS-DRG 573, 574, 575, 592, 593, 594, with relative weights from 0.8668 to 6.5514 depending on complications. Higher weights mean higher Medicare reimbursement.