2026 ICD-10-CM Diagnosis Code B55.1Cutaneous leishmaniasis

ICD-10-CM Codes›A00–B99›B50-B64›B55

ICD-10-CM B55.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B55.1 is a billable ICD-10-CM diagnosis code for cutaneous leishmaniasis. 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 Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B55.1
Billable Status
Yes — Valid for Submission
Code Describes
Cutaneous leishmaniasis
Short Description
Cutaneous leishmaniasis
Same as the full description in the CMS dataset.
Parent Code
B55
Leishmaniasis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB50-B64Protozoal diseases
CategoryB55Leishmaniasis
This CodeB55.1Cutaneous leishmaniasis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute necrotizing cutaneous leishmaniasis
  • American cutaneous/mucocutaneous Leishmaniasis
  • American mucocutaneous leishmaniasis
  • Asian desert cutaneous leishmaniasis
  • Classical zoonotic cutaneous leishmaniasis
  • Cutaneous leishmaniasis
  • Diffuse cutaneous leishmaniasis
  • Diffuse cutaneous leishmaniasis caused by Leishmania aethiopica
  • Diffuse cutaneous New World leishmaniasis
  • Disseminated anergic leishmaniasis
  • Dry form of cutaneous leishmaniasis
  • Indian anthroponotic cutaneous leishmaniasis
  • Indian zoonotic cutaneous leishmaniasis
  • Infection by Leishmania aethiopica
  • Infection by Leishmania braziliensis
  • Infection by Leishmania mexicana
  • Infection by Leishmania tropica minor
  • Late cutaneous leishmaniasis
  • Leishmania brasiliensis complex cutaneous leishmaniasis
  • Leishmania mexicana localized cutaneous leishmaniasis
  • Leishmania recidiva
  • Localized cutaneous leishmaniasis
  • Localized cutaneous leishmaniasis co-occurrent with nodular lymphangitis
  • Localized infection of skin AND/OR subcutaneous tissue
  • Lupoid leishmaniasis
  • Middle Eastern zoonotic cutaneous leishmaniasis
  • Post-kala-azar dermal leishmaniasis
  • Recurrent cutaneous leishmaniasis
  • Recurrent skin infection
  • Sahelian zoonotic cutaneous leishmaniasis
  • Ulcerating cutaneous leishmaniasis
  • Ulcerating cutaneous leishmaniasis of lower extremity
  • Wet form of cutaneous leishmaniasis
  • Zoonotic form of cutaneous leishmaniasis

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.

    • Aleppo boil
    • Biskra's button
    • Boil
      • Aleppo
    • Boil
      • Baghdad
    • Boil
      • Delhi
    • Boil
      • Natal
    • Boil
      • tropical
    • Button
      • Biskra
    • Button
      • Delhi
    • Button
      • oriental
    • Chiclero ulcer or sore
    • Delhi boil or button
    • Infection, infected, infective(opportunistic)
      • Leishmania
        • aethiopica
    • Infection, infected, infective(opportunistic)
      • Leishmania
        • major
    • Infection, infected, infective(opportunistic)
      • Leishmania
        • mexicana
    • Infection, infected, infective(opportunistic)
      • Leishmania
        • tropica
    • Infestation
      • eyelid
        • in (due to)
          • leishmaniasis
    • Leishmaniasis
      • American (mucocutaneous)
        • cutaneous
    • Leishmaniasis
      • Asian Desert
    • Leishmaniasis
      • cutaneous (any type)
    • Leishmaniasis
      • eyelid
    • Leishmaniasis
      • old world
    • Leishmaniasis
      • tegumentaria diffusa
    • Sore
      • chiclero
    • Sore
      • Delhi
    • Sore
      • Lahore
    • Sore
      • oriental
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • chiclero
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • Cochin-China
    • Uta

Clinical ClassificationClinical

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

CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • American Cutaneous Leishmaniasis

    the most common form of leishmaniasis that is transmitted through the bite of female phlebotomine sand flies or after exposure to leishmania parasites. it is characterized by skin lesions at the site of insect bite which typically develop within weeks or months after exposure. the lesions typically progress from small papules to open sores with raised borders and central ulcers which can be covered with scales or crust.

  • Asian Desert Cutaneous Leishmaniasis

    an acute necrotizing form of cutaneous leishmaniasis caused by infection with leishmania tropica major.

  • Cutaneous Leishmaniasis

    leishmaniasis affecting the skin. it is the most common form of leishmaniasis. it presents with erythematous macules and papules, and nodules which may eventually ulcerate. the lesions appear in the bite site in the exposed skin areas.

Patient EducationClinical

Leishmaniasis

Leishmaniasis is a parasitic disease spread by the bite of infected sand flies. There are several different forms of leishmaniasis. The most common are cutaneous and visceral. The cutaneous type causes skin sores. The visceral type affects internal organs such as the spleen, liver, and bone marrow.

Read the full article at MedlinePlus

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

Convert B55.1 to ICD-9-CMHistory

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

ICD-9-CM
085.1 Cutan leishmanias urban
Approximate The match is approximate rather than exact.
ICD-9-CM
085.2 Cutan leishmanias asian
Approximate The match is approximate rather than exact.
ICD-9-CM
085.3 Cutan leishmanias ethiop
Approximate The match is approximate rather than exact.
ICD-9-CM
085.4 Cutan leishmanias amer
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 B55.1Overview

Is B55.1 (Leishmaniasis) a billable code?

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

What MS-DRG does B55.1 group to?

When cutaneous leishmaniasis 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 B55.1?

Under the General Equivalence Mappings, cutaneous leishmaniasis converts to ICD-9-CM 085.1 (cutan leishmanias urban), 085.2 (cutan leishmanias asian), and 085.3 (cutan leishmanias ethiop). The mapping is approximate, so confirm the match fits the documentation.

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.