2026 ICD-10-CM Diagnosis Code L97.509Non-pressure chronic ulcer of other part of unspecified foot with unspecified severity

ICD-10-CM Codes›L00–L99›L80-L99›L97

ICD-10-CM L97.509
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L97.509 is a billable ICD-10-CM diagnosis code for non-pressure chronic ulcer of other part of unspecified foot with unspecified severity. 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 Non-pressure ulcer of skin.

Code Identity

ICD-10-CM Code
L97.509
Billable Status
Yes — Valid for Submission
Code Describes
Non-pressure chronic ulcer of other part of unspecified foot with unspecified severity
Short Description
Non-pressure chronic ulcer oth prt unsp foot w unsp severity
Parent Code
L97.50
Non-pressure chronic ulcer of other part of unspecified foot

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 CodeL97.509Non-pressure chronic ulcer of other part of unspecified foot with unspecified severity

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic neurogenic ulcer of lower limb
  • Chronic ulcer of foot
  • Chronic ulcer of toe
  • Diabetic foot ulcer
  • Ischemic foot ulcer
  • Ischemic foot ulcer due to atherosclerosis of artery of lower limb
  • Ischemic ulcer of foot due to diabetes mellitus
  • Ischemic ulcer of foot due to type 2 diabetes mellitus
  • Ischemic ulcer of toe
  • Mixed diabetic ulcer - foot
  • Neuroischemic foot ulcer
  • Neuropathic ulcer of foot
  • Neuropathic ulcer of foot due to diabetes mellitus
  • Neuropathic ulcer of foot due to type 2 diabetes mellitus
  • Neuropathic ulcer of toe due to type 2 diabetes mellitus
  • Skin ulcer of dorsum of foot
  • Ulcer of big toe
  • Ulcer of foot due to drug induced diabetes mellitus
  • Ulcer of foot due to type 1 diabetes mellitus
  • Ulcer of forefoot due to type 1 diabetes mellitus
  • Ulcer of forefoot due to type 2 diabetes mellitus
  • Ulcer of lower limb due to type 1 diabetes mellitus
  • Ulcer of toe
  • Ulcer of toe due to type 2 diabetes mellitus
  • Varicose ulcer of foot
  • Venous ulcer of toe

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)
        • foot specified NEC
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • lower limb (atrophic) (chronic) (neurogenic) (perforating) (pyogenic) (trophic) (tropical)
        • toe

Clinical ClassificationClinical

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

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 L97.509 to ICD-9-CMHistory

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

ICD-9-CM
707.15 Ulcer other part of foot
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 L97.509Overview

Is L97.509 (Non-pressure chronic ulcer of other part of unspecified foot) a billable code?

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

What MS-DRG does L97.509 group to?

When non-pressure chronic ulcer of other part of unspecified foot with unspecified severity 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 L97.509?

Under the General Equivalence Mappings, non-pressure chronic ulcer of other part of unspecified foot with unspecified severity converts to ICD-9-CM 707.15 (ulcer other part of foot). 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.