Leprosy [Hansen's disease] (A30) ICD-10-CM
The A30 code range covers leprosy [hansen's disease] with 9 ICD-10-CM diagnosis codes. 8 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- infection due to Mycobacterium leprae
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- sequelae of leprosy B92
Codes in the A30 Range 9 codes · 8 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A30 range.
Leprosy
A chronic granulomatous infection caused by MYCOBACTERIUM LEPRAE. The granulomatous lesions are manifested in the skin, the mucous membranes, and the peripheral nerves. Two polar or principal types are lepromatous and tuberculoid.
Leprosy, Borderline
A form of LEPROSY in which there are clinical manifestations of both principal types (lepromatous and tuberculoid). The disease may shift toward one of these two polar or principal forms.
Leprosy, Lepromatous
A chronic communicable infection which is a principal or polar form of LEPROSY. This disorder is caused by MYCOBACTERIUM LEPRAE and produces diffuse granulomatous skin lesions in the form of nodules, macules, or papules. The peripheral nerves are involved symmetrically and neural sequelae occur in the advanced stage.
Leprosy, Multibacillary
A form of LEPROSY classified by the World Health Organization for the purpose of treatment, based on clinical manifestations and skin smear results. Patients with multibacillary leprosy have six or more lesions with or without positive skin smear results for the causative agent MYCOBACTERIUM LEPRAE. Multibacillary leprosy encompasses borderline lepromatous, midborderline, and lepromatous leprosy.
Leprosy, Paucibacillary
A form of LEPROSY classified by the World Health Organization for the purpose of treatment, based on clinical manifestations and skin smear results. Patients with paucibacillary leprosy have fewer than six skin lesions with no causative agent MYCOBACTERIUM LEPRAE on any slit-skin smear testing. Paucibacillary leprosy encompasses indeterminate, borderline tuberculoid, and tuberculoid leprosy.
Leprosy, Tuberculoid
A principal or polar form of LEPROSY in which the skin lesions are few and are sharply demarcated. Peripheral nerve involvement is pronounced and may be severe. Unlike lepromatous leprosy (LEPROSY, LEPROMATOUS), the lepromin test is positive. Tuberculoid leprosy is rarely a source of infection to others.
Mycobacterium leprae
A species of gram-positive, aerobic bacteria that causes LEPROSY in man. Its organisms are generally arranged in clumps, rounded masses, or in groups of bacilli side by side.
About the A30 Code Range
The ICD-10 code for leprosy is categorized under A30, which covers all forms of Hansen's disease. These codes specifically classify the various types and presentations of leprosy, aiding in precise diagnosis and reporting.
The codes under A30 include subtypes such as A30.0 for indeterminate leprosy, also known as leprosy reversal reaction, and A30.1 for tuberculoid leprosy, sometimes called neural type tuberculoid leprosy. Borderline forms appear as A30.2 (borderline tuberculoid), A30.3 (midborderline or borderline leprosy), and A30.4 (borderline lepromatous leprosy). The A30.5 code addresses lepromatous leprosy, which may also be noted as lepromatous scarring alopecia or facies leprosa, highlighting its severe systemic effects. Other forms are coded as A30.8 and unspecified cases under A30.9, encompassing a range of clinical manifestations including leprosy neuropathy and leonine facies. These detailed classifications help healthcare professionals select the most accurate code when documenting bacterial infections caused by Mycobacterium leprae.
Questions About This Page
How many billable codes are in the A30 range?
Of the 9 codes in this range, 8 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the A30 range classify?
The range classifies leprosy [hansen's disease]. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
