2026 ICD-10-CM Diagnosis Code B25.2Cytomegaloviral pancreatitis

ICD-10-CM Codes›A00–B99›B25-B34›B25

ICD-10-CM B25.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B25.2 is a billable ICD-10-CM diagnosis code for cytomegaloviral pancreatitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 438 through 440. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pancreatic disorders (excluding diabetes) and Viral infection.

Code Identity

ICD-10-CM Code
B25.2
Billable Status
Yes — Valid for Submission
Code Describes
Cytomegaloviral pancreatitis
Short Description
Cytomegaloviral pancreatitis
Same as the full description in the CMS dataset.
Parent Code
B25
Cytomegaloviral disease

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB25-B34Other viral diseases
CategoryB25Cytomegaloviral disease
This CodeB25.2Cytomegaloviral pancreatitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cytomegaloviral pancreatitis
  • Infectious pancreatitis

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.

    • Pancreatitis(annular) (apoplectic) (calcareous) (edematous) (hemorrhagic) (malignant) (subacute) (suppurative)
      • cytomegaloviral

Clinical ClassificationClinical

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

CCSR DIG020
Pancreatic disorders (excluding diabetes)
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF008
Viral infection
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Cytomegalovirus Infections

Cytomegalovirus (CMV) is a virus found around the world. It is related to the viruses that cause chickenpox and infectious mononucleosis (mono). Between 50% and 80% of adults in the United States have had a CMV infection by age 40. Once CMV is in a person's body, it stays there for life.

Read the full article at MedlinePlus

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

Convert B25.2 to ICD-9-CMHistory

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

ICD-9-CM
078.5 Cytomegaloviral disease
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
577.0 Acute pancreatitis
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.

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 B25.2Overview

Is B25.2 (Cytomegaloviral disease) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report cytomegaloviral pancreatitis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B25.2 group to?

When cytomegaloviral pancreatitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 438, 439, 440, with relative weights from 0.6214 to 1.6302 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B25.2?

Under the General Equivalence Mappings, cytomegaloviral pancreatitis converts to ICD-9-CM 078.5 (cytomegaloviral disease) and 577.0 (acute pancreatitis). 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.