B57.49 ICD-10-CM Code: Other nervous system involvement in Chagas' disease
B57.49 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Protozoal diseases (B50-B64)
B57.49
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther nervous system involvement in Chagas' disease
Chagas' disease affecting the nervous system in ways other than meningoencephalitis, such as peripheral neuropathy or other neurological manifestations.
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
OfficialICD-10-CM does not list inclusion terms for B57.49 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for B57.49 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for B57.49 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for B57.49 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for B57.49 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for B57.49 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for B57.49 in this effective period.
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 B57.49 an HCC code?
No. B57.49 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
- B57.49
- Description
- Other nervous system involvement in Chagas' disease
- 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
B57.49 is the ICD-10-CM diagnosis code for other nervous system involvement in chagas' disease. Chagas' disease affecting the nervous system in ways other than meningoencephalitis, such as peripheral neuropathy or other neurological manifestations. B57.49 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering protozoal diseases (b50-b64).
B57.49 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.
Document the specific nervous system involvement when possible for clinical clarity.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for B57.49 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the specific nervous system involvement when possible for clinical clarity
- •Use this code for cardiac arrhythmias or conduction abnormalities related to Chagas' nervous system involvement