B18.1 – Chronic viral hepatitis B without delta-agent

ICD-10-CM 2027 diagnosis code · Viral hepatitis

Billable code

ICD-10-CM code B18.1

Code: B18.1 (claims format: B181)
Description: Chronic viral hepatitis B without delta-agent
Billable: Yes – valid for HIPAA-covered transactions
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
Parent codes: B18

Notes for B18.1

Applicable to:

Carrier of viral hepatitis B
Chronic (viral) hepatitis B

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

B18 – Chronic viral hepatitis

Includes:

Carrier of viral hepatitis

Use additional code:

code, if applicable, for ascites (R18.8)

Block B15-B19

Excludes1 (not coded here):

sequelae of viral hepatitis (B94.2)

Excludes2 (not included here):

cytomegaloviral hepatitis (B25.1)
herpesviral [herpes simplex] hepatitis (B00.81)

Index terms for B18.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in B18

B18.0 – Chronic viral hepatitis B with delta-agentBillable
B18.2 – Chronic viral hepatitis CBillable
B18.8 – Other chronic viral hepatitisBillable
B18.9 – Chronic viral hepatitis, unspecifiedBillable

Frequently asked questions

What is ICD-10 code B18.1?

B18.1 is the ICD-10-CM code for chronic viral hepatitis B without delta-agent, in the block B15-B19 (Viral hepatitis).

Is B18.1 a billable code?

Yes. B18.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does B18.1 belong to?

It belongs to category B18 – Chronic viral hepatitis.

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.