2026 ICD-10-CM Diagnosis Code A30.3Borderline leprosy

ICD-10-CM Codes›A00–B99›A30-A49›A30

ICD-10-CM A30.3
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A30.3 is a billable ICD-10-CM diagnosis code for borderline leprosy. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections.

Code Identity

ICD-10-CM Code
A30.3
Billable Status
Yes — Valid for Submission
Code Describes
Borderline leprosy
Short Description
Borderline leprosy
Same as the full description in the CMS dataset.
Parent Code
A30
Leprosy [Hansen's disease]

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA30-A49Other bacterial diseases
CategoryA30Leprosy [Hansen's disease]
This CodeA30.3Borderline leprosy

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Borderline leprosy
  • Midborderline leprosy

Tabular List NotesGuidance

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

Inclusion Terms

  • BB leprosy

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.

    • Leprosy
      • BB
    • Leprosy
      • borderline (infiltrated) (neuritic)
    • Leprosy
      • dimorphous (infiltrated) (neuritic)
    • Leprosy
      • mixed
    • Leprosy
      • primary neuritic

Clinical ClassificationClinical

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

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • 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.

Patient EducationClinical

Mycobacterial Infections

Mycobacteria are a type of germ. There are many different kinds. The most common one causes tuberculosis. Another one causes leprosy. Still others cause infections that are called atypical mycobacterial infections. They aren't "typical" because they don't cause tuberculosis.

Read the full article at MedlinePlus

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

Convert A30.3 to ICD-9-CMHistory

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

ICD-9-CM
030.3 Borderline leprosy
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 A30.3Overview

Is A30.3 (Leprosy [Hansen's disease]) a billable code?

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

What MS-DRG does A30.3 group to?

When borderline leprosy is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, with relative weights from 0.7297 to 2.0932 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A30.3?

Under the General Equivalence Mappings, borderline leprosy converts to ICD-9-CM 030.3 (borderline leprosy). 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.