2026 ICD-10-CM Diagnosis Code L98.434Non-pressure chronic ulcer of abdomen with necrosis of bone

ICD-10-CM Codes›L00–L99›L80-L99›L98

ICD-10-CM L98.434
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L98.434 is a billable ICD-10-CM diagnosis code for non-pressure chronic ulcer of abdomen with necrosis of bone. 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
L98.434
Billable Status
Yes — Valid for Submission
Code Describes
Non-pressure chronic ulcer of abdomen with necrosis of bone
Short Description
Non-pressure chronic ulcer of abdomen with necrosis of bone
Same as the full description in the CMS dataset.
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 CodeL98.434Non-pressure chronic ulcer of abdomen with necrosis of bone

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
          • bone necrosis

Code History & ChangesHistory

New Code L98.434 was added to the ICD-10-CM code set for FY 2026, effective October 1, 2025.

Replacement L98.434 replaces the following previously assigned code(s):

  • L98.494 - Non-prs chronic ulcer of skin of sites w necrosis of bone
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 L98.434Overview

Is L98.434 (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 bone on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L98.434 group to?

When non-pressure chronic ulcer of abdomen with necrosis of bone 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.