A30.0 ICD-10-CM Code: Indeterminate leprosy
A30.0 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Other bacterial diseases (A30-A49)
A30.0
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceIndeterminate leprosy
Indeterminate leprosy is the earliest form of Hansen's disease, a bacterial infection caused by Mycobacterium leprae that affects the skin and nerves. At this stage, the disease has not yet developed the characteristic features that would classify it into other types of leprosy.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- I leprosy
Excludes 2
Official- carrier or suspected carrier of infectious disease (Z22.-)Inherited from A00-B99
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)Inherited from A00-B99
- infectious and parasitic diseases specific to the perinatal period (P35-P39)Inherited from A00-B99
- influenza and other acute respiratory infections (J00-J22)Inherited from A00-B99
Related Codes
Includes
Official- diseases generally recognized as communicable or transmissibleInherited from A00-B99, A30
- infection due to Mycobacterium lepraeInherited from A00-B99, A30
Excludes 1
Official- certain localized infections - see body system-related chaptersInherited from A00-B99, A30
- sequelae of leprosy (B92)Inherited from A00-B99, A30
Code First
OfficialNo Code First sequencing instructions are included in this display for A30.0. Check the code and parent instructions in the Code Book.
Use Additional
Official- code to identify resistance to antimicrobial drugs (Z16.-)Inherited from A00-B99
Code Also
OfficialNo Code Also instructions are included in this display for A30.0. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is A30.0 an HCC code?
No. A30.0 is a billable ICD-10-CM code with no mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models.
- Code
- A30.0
- Description
- Indeterminate leprosy
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A30.0 is the ICD-10-CM diagnosis code for indeterminate leprosy. Indeterminate leprosy is the earliest form of Hansen's disease, a bacterial infection caused by Mycobacterium leprae that affects the skin and nerves. At this stage, the disease has not yet developed the characteristic features that would classify it into other types of leprosy. A30.0 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering other bacterial diseases (a30-a49).
A30.0 is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.
This code is used when leprosy is newly diagnosed but has not yet progressed to a classifiable form; always verify the clinical documentation confirms indeterminate classification rather than another leprosy type.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for A30.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code is used when leprosy is newly diagnosed but has not yet progressed to a classifiable form; always verify the clinical documentation confirms indeterminate classification rather than another leprosy type
- •Remember that leprosy is a reportable disease in most jurisdictions, so ensure proper public health reporting is completed alongside coding