2027 ICD-10-CM Diagnosis Code L84Corns and callosities

ICD-10-CM Codes›L00–L99›L80-L99›L84

ICD-10-CM L84
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L84 is a billable ICD-10-CM diagnosis code for corns and callosities. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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
Short Description
Corns and callosities
Same as the full description in the CMS dataset.
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 caused by device
  • 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L84: its own notes plus those printed at Chapter 12. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Callus
  • Clavus

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue applies to 1,001 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

Clinical InformationClinical

  • Keratoderma, Palmoplantar, Diffuse

    an autosomal dominant disorder characterized by a widely distributed, well-demarcated hyperkeratosis of the palms and soles. there is more than one genotypically distinct form, each of which is clinically similar but histologically distinguishable. diffuse palmoplantar keratoderma is distinct from palmoplantar keratoderma (keratoderma, palmoplantar), as the former exhibits autosomal dominant inheritance and hyperhidrosis is frequently present.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About L84Overview

What is the ICD-10 code for corns and callosities?

The ICD-10-CM code for corns and callosities is L84. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does L84 group to?

When corns and callosities is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 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.