2026 ICD-10-CM Diagnosis Code B16Acute hepatitis B

ICD-10-CM Codes›A00–B99›B15-B19›B16

ICD-10-CM B16
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B16 is a non-billable ICD-10-CM category code for acute hepatitis B, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B16.0, B16.1, B16.2, and B16.9.

Code Identity

ICD-10-CM Code
B16
Billable Status
No — Non-Billable Category
Code Describes
Acute hepatitis B
Chapter
B15-B19
Viral hepatitis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB15-B19Viral hepatitis
CategoryB16Acute hepatitis B
This CodeB16Acute hepatitis B

Specific Coding for Acute hepatitis BOverview

Non-specific codes like B16 require more characters. Use one of these billable codes instead:

  • Use B16.0 for Acute hepatitis B with delta-agent with hepatic coma

  • Use B16.1 for Acute hepatitis B with delta-agent without hepatic coma

  • Use B16.2 for Acute hepatitis B without delta-agent with hepatic coma

  • Use B16.9 for Acute hepatitis B without delta-agent and without hepatic coma

Patient EducationClinical

Hepatitis B

Hepatitis is inflammation of the liver. Inflammation is swelling that happens when tissues of the body are injured or infected. It can damage your liver. This swelling and damage can affect how well your liver functions.

The full article covers:

  • What is hepatitis?
  • What is hepatitis B?
  • What causes hepatitis B?
  • Who is at risk for hepatitis B?
  • What are the symptoms of hepatitis B?
  • What other problems can hepatitis B cause?
  • How is hepatitis B diagnosed?
  • What are the treatments for hepatitis B?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B16Overview

Is B16 (Acute hepatitis B) a billable code?

No. This is a category header that groups the codes for acute hepatitis B, and headers cannot be submitted on claims. Claims for acute hepatitis B need a more specific code from this category, such as B16.0, B16.1, and B16.2.