2026 ICD-10-CM Diagnosis Code B16.2Acute hepatitis B without delta-agent with hepatic coma

ICD-10-CM Codes›A00–B99›B15-B19›B16

ICD-10-CM B16.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B16.2 is a billable ICD-10-CM diagnosis code for acute hepatitis B without delta-agent with hepatic coma. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 441 through 443. Coders also document this condition as hepatic coma due to acute hepatitis B. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Coma; stupor; and brain damage, Hepatitis, and Viral infection.

Code Identity

ICD-10-CM Code
B16.2
Billable Status
Yes — Valid for Submission
Code Describes
Acute hepatitis B without delta-agent with hepatic coma
Short Description
Acute hepatitis B without delta-agent with hepatic coma
Same as the full description in the CMS dataset.
Parent Code
B16
Acute hepatitis B

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB15-B19Viral hepatitis
CategoryB16Acute hepatitis B
This CodeB16.2Acute hepatitis B without delta-agent with hepatic coma

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hepatic coma due to acute hepatitis B
  • Hepatic coma due to viral hepatitis B

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Hepatitis
      • B
        • acute
          • with
            • hepatic coma (without delta-agent coinfection)
    • Hepatitis
      • viral, virus
        • type
          • B
            • acute
              • with
                • hepatic coma (without delta-agent coinfection)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS013
Coma; stupor; and brain damage
Default principal diagnosis: inpatient No · outpatient No
CCSR INF007
Hepatitis
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF008
Viral infection
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Coma

A coma is a deep state of unconsciousness. An individual in a coma is alive but unable to move or respond to his or her environment. Coma may occur as a complication of an underlying illness, or as a result of injuries, such as brain injury.

Read the full article at MedlinePlus

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

Convert B16.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
070.20 Hpt B acte coma wo dlta
Approximate The match is approximate rather than exact.

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 B16.2Overview

Is B16.2 (Acute hepatitis B) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acute hepatitis B without delta-agent with hepatic coma on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B16.2 group to?

When acute hepatitis B without delta-agent with hepatic coma is the principal diagnosis on an inpatient stay, it groups to MS-DRG 441, 442, 443, with relative weights from 0.6997 to 1.7947 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B16.2?

Under the General Equivalence Mappings, acute hepatitis B without delta-agent with hepatic coma converts to ICD-9-CM 070.20 (hpt B acte coma wo dlta). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.