2026 ICD-10-CM Diagnosis Code L97.924Non-pressure chronic ulcer of unspecified part of left lower leg with necrosis of bone

ICD-10-CM Codes›L00–L99›L80-L99›L97

ICD-10-CM L97.924
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L97.924 is a billable ICD-10-CM diagnosis code for non-pressure chronic ulcer of unspecified part of left lower leg 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Aseptic necrosis and osteonecrosis and Non-pressure ulcer of skin.

Code Identity

ICD-10-CM Code
L97.924
Billable Status
Yes — Valid for Submission
Code Describes
Non-pressure chronic ulcer of unspecified part of left lower leg with necrosis of bone
Short Description
Non-prs chronic ulc unsp prt of l low leg w necrosis of bone
Parent Code
L97.92
Non-pressure chronic ulcer of unspecified part of left lower leg

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL80-L99Other disorders of the skin and subcutaneous tissue
CategoryL97Non-pressure chronic ulcer of lower limb, not elsewhere classified
This CodeL97.924Non-pressure chronic ulcer of unspecified part of left lower leg 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
      • lower limb (atrophic) (chronic) (neurogenic) (perforating) (pyogenic) (trophic) (tropical)
        • left
          • with
            • bone necrosis
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • lower limb (atrophic) (chronic) (neurogenic) (perforating) (pyogenic) (trophic) (tropical)
        • lower leg NOS
          • left
            • with
              • bone necrosis

Clinical ClassificationClinical

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

CCSR MUS030
Aseptic necrosis and osteonecrosis
Default principal diagnosis: inpatient No · outpatient No
CCSR SKN004
Non-pressure ulcer of skin
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Skin Conditions

Your skin is your body's largest organ. It covers the entire outside of your body. There are many ways that your skin protects your body and helps keep you healthy. For example, it:

The full article covers:

  • What does your skin do?
  • What problems and conditions can affect your skin?
  • How can I keep my skin healthy?

Read the full article at MedlinePlus

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

Convert L97.924 to ICD-9-CMHistory

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

ICD-9-CM
707.10 Ulcer of lower limb NOS
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 L97.924Overview

Is L97.924 a billable code?

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

What MS-DRG does L97.924 group to?

When non-pressure chronic ulcer of unspecified part of left lower leg 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.

What is the ICD-9 equivalent of L97.924?

Under the General Equivalence Mappings, non-pressure chronic ulcer of unspecified part of left lower leg with necrosis of bone converts to ICD-9-CM 707.10 (ulcer of lower limb NOS). 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.