2026 ICD-10-CM Diagnosis Code B55Leishmaniasis

ICD-10-CM CodesA00–B99B50-B64B55

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

B55 is a non-billable ICD-10-CM category code for leishmaniasis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B55.0, B55.1, B55.2, and B55.9.

Code Identity

ICD-10-CM Code
B55
Billable Status
No — Non-Billable Category
Code Describes
Leishmaniasis
Chapter
B50-B64
Protozoal diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB50-B64Protozoal diseases
CategoryB55Leishmaniasis
This CodeB55Leishmaniasis

Specific Coding for LeishmaniasisOverview

Non-specific codes like B55 require more characters. Use one of these billable codes instead:

  • Use B55.0 for Visceral leishmaniasis

  • Use B55.1 for Cutaneous leishmaniasis

  • Use B55.2 for Mucocutaneous leishmaniasis

  • Use B55.9 for Leishmaniasis, unspecified

Clinical InformationClinical

  • Leishmaniasis

    a disease caused by any of a number of species of protozoa in the genus leishmania. there are four major clinical types of this infection: cutaneous (old and new world) (leishmaniasis, cutaneous), diffuse cutaneous (leishmaniasis, diffuse cutaneous), mucocutaneous (leishmaniasis, mucocutaneous), and visceral (leishmaniasis, visceral).
  • Leishmaniasis Vaccines

    vaccines or candidate vaccines used to prevent infection with leishmania.
  • Leishmaniasis, Cutaneous

    an endemic disease that is characterized by the development of single or multiple localized lesions on exposed areas of skin that typically ulcerate. the disease has been divided into old and new world forms. old world leishmaniasis is separated into three distinct types according to epidemiology and clinical manifestations and is caused by species of the l. tropica and l. aethiopica complexes as well as by species of the l. major genus. new world leishmaniasis, also called american leishmaniasis, occurs in south and central america and is caused by species of the l. mexicana or l. braziliensis complexes.
  • Leishmaniasis, Diffuse Cutaneous

    a form of leishmaniasis, cutaneous caused by leishmania aethiopica in ethiopia and kenya, l. pifanoi in venezuela, l. braziliensis in south america, and l. mexicana in central america. this disease is characterized by massive dissemination of skin lesions without visceral involvement.
  • Leishmaniasis, Mucocutaneous

    a disease characterized by the chronic, progressive spread of lesions from new world cutaneous leishmaniasis caused by species of the l. braziliensis complex to the nasal, pharyngeal, and buccal mucosa some time after the appearance of the initial cutaneous lesion. nasal obstruction and epistaxis are frequent presenting symptoms.
  • Leishmaniasis, Visceral

    a chronic disease caused by leishmania donovani and transmitted by the bite of several sandflies of the genera phlebotomus and lutzomyia. it is commonly characterized by fever, chills, vomiting, anemia, hepatosplenomegaly, leukopenia, hypergammaglobulinemia, emaciation, and an earth-gray color of the skin. the disease is classified into three main types according to geographic distribution: indian, mediterranean (or infantile), and african.
  • Leishmania

    a genus of flagellate protozoa comprising several species that are pathogenic for humans. organisms of this genus have an amastigote and a promastigote stage in their life cycles. as a result of enzymatic studies this single genus has been divided into two subgenera: leishmania leishmania and leishmania viannia. species within the leishmania leishmania subgenus include: l. aethiopica, l. arabica, l. donovani, l. enrietti, l. gerbilli, l. hertigi, l. infantum, l. major, l. mexicana, and l. tropica. the following species are those that compose the leishmania viannia subgenus: l. braziliensis, l. guyanensis, l. lainsoni, l. naiffi, and l. shawi.
  • Leishmania donovani

    a parasitic hemoflagellate of the subgenus leishmania leishmania that infects man and animals and causes visceral leishmaniasis (leishmaniasis, visceral). the sandfly genera phlebotomus and lutzomyia are the vectors.
  • 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.
  • Kala-Azar|Visceral Leishmaniasis

    a chronic parasitic infection affecting the viscera and caused by leishmania donovani. signs and symptoms include fever, anorexia, fatigue, lymphadenopathy, anemia, and hepatosplenomegaly. if left untreated it may lead to death.
  • Leishmaniasis

    a parasitic infection caused by protozoa of the genus leishmania. it is transmitted to humans via the bite of sandflies. there are three main forms of the disease: cutaneous, mucocutaneous, and visceral leishmaniasis. cutaneous leishmaniasis causes skin ulcers; mucocutaneous leishmaniasis causes destructive lesions of the mucous membranes of the nose, mouth, and throat; visceral leishmaniasis is the most severe form of the disease and is manifested with anemia, weight loss, hepatomegaly and splenomegaly.
  • Post Kala-Azar Dermal Leishmaniasis

    a cutaneous form of leishmaniasis which sometimes occurs after visceral leishmaniasis treatment. it is characterized by hypo-pigmented macules, papules, plaques, nodules, or facial erythema; and is considered to be a durable infection reservoir for visceral leishmaniasis.

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.

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 B55Overview

Is B55 (Leishmaniasis) a billable code?

No. This is a category header that groups the codes for leishmaniasis, and headers cannot be submitted on claims. Claims for leishmaniasis need a more specific code from this category, such as B55.0, B55.1, and B55.2.