B19.9 ICD-10-CM Code: Unspecified viral hepatitis without hepatic coma
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Viral hepatitis (B15-B19)
B19.9
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceUnspecified viral hepatitis without hepatic coma
A viral infection of the liver where the specific type of hepatitis virus is unknown and the patient does not have severe liver failure complications.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
Official- Viral hepatitis NOS
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for B19.9 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for B19.9 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for B19.9 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for B19.9 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for B19.9 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for B19.9 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is B19.9 an HCC code?
No. B19.9 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
B19.9 is the ICD-10-CM diagnosis code for unspecified viral hepatitis without hepatic coma. A viral infection of the liver where the specific type of hepatitis virus is unknown and the patient does not have severe liver failure complications. B19.9 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering viral hepatitis (b15-b19).
B19.9 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
This is a non-specific code; use only when the type of viral hepatitis cannot be determined from documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for B19.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is a non-specific code; use only when the type of viral hepatitis cannot be determined from documentation
- •If any specific hepatitis type (A, B, C, D, or E) is identified, use the appropriate specific code instead