2026 ICD-10-CM Diagnosis Code L84Corns and callosities

ICD-10-CM Codes›L00–L99›L80-L99›L84

ICD-10-CM L84
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L84 is a billable ICD-10-CM diagnosis code for corns and callosities. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders.

Code Identity

ICD-10-CM Code
L84
Billable Status
Yes — Valid for Submission
Code Describes
Corns and callosities
Chapter
L80-L99
Other disorders of the skin and subcutaneous tissue

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL80-L99Other disorders of the skin and subcutaneous tissue
CategoryL84Corns and callosities
This CodeL84Corns and callosities

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Ankylosing vertebral hyperostosis with tylosis syndrome
  • Apical callus
  • Callosity
  • Callosity between toes
  • Callosity due to biting and/or chewing
  • Callosity due to habit tic
  • Callosity on hand
  • Callosity on toe
  • Callosity resulting from occupation
  • Callosity under metatarsal head
  • Callus of forefoot
  • Callus of heel
  • Callus of hindfoot
  • Callus of periwound skin
  • Corn - lesion
  • Corn of toe
  • Diffuse callus
  • Durlachers corn
  • Familial painful callosities
  • Fibrous corn
  • Foot callus
  • Habit tic
  • Habit tic affecting skin
  • Hard corn
  • Interdigital corn
  • Intractable plantar keratoma
  • Neurovascular corn
  • Palmar callosity
  • Pinch callus
  • Plantar callosity
  • Prayer nodule
  • Pretalar callosity
  • Seed corn
  • Soft corn
  • Subungual corn
  • Talar callosity
  • Vascular corn

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Callus
  • Clavus

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.

    • Callositas, callosity(infected)
    • Callus(infected)
    • Clavus(infected)
    • Corn(infected)
    • Heloma
    • Tylosis(acquired)

Clinical ClassificationClinical

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

CCSR SKN007
Other specified and unspecified skin disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Corns and Calluses

Corns and calluses are caused by pressure or friction on your skin. They often appear on feet where the bony parts of your feet rub against your shoes. Corns usually appear on the tops or sides of toes while calluses form on the soles of feet. Calluses also can appear on hands or other areas that are rubbed or pressed.

Read the full article at MedlinePlus

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

Convert L84 to ICD-9-CMHistory

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

ICD-9-CM
700 Corns and callosities
Exact Match The mapping is direct, with no qualifiers.

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 L84Overview

Is L84 (Corns and callosities) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report corns and callosities on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L84 group to?

When corns and callosities is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of L84?

Under the General Equivalence Mappings, corns and callosities converts to ICD-9-CM 700 (corns and callosities). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.