B18 – Chronic viral hepatitis
ICD-10-CM 2027 diagnosis code · Viral hepatitis
ICD-10-CM code
B18
- Code
B18(claims format:B18)- Description
- Chronic viral hepatitis
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- B15-B19 Viral hepatitis
Billable codes under B18
B18 is a header code and cannot be used on claims. Choose the most specific code:
Notes for B18
Includes:
- Carrier of viral hepatitis
Use additional code:
- code, if applicable, for ascites (R18.8)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block B15-B19
Excludes1 (not coded here):
- sequelae of viral hepatitis (B94.2)
Frequently asked questions
What is ICD-10 code B18?
B18 is the ICD-10-CM code for chronic viral hepatitis, in the block B15-B19 (Viral hepatitis).
Is B18 a billable code?
No. B18 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.