B27.19

Billable

ChapterA00–B99

Ranksubcategory

Official Description

Cytomegaloviral mononucleosis with other complication

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

Instructional Notes

Includes

Hepatomegaly in cytomegaloviral mononucleosis

General instructions are available for the parent sections:

View CH1 Notes View B27 Notes

Clinical Hierarchy

CH1Certain infectious and parasitic diseases (A00-B99)

B25-B34Other viral diseases (B25-B34)

B27Infectious mononucleosis

B27.1Cytomegaloviral mononucleosis

B27.19Cytomegaloviral mononucleosis with other complication

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to B27.19:

categoryB27

Infectious mononucleosis

View context instructions

chapterCH1

Certain infectious and parasitic diseases (A00-B99)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to B27.19. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

2 raw paths

Infection, infected, infective (opportunistic)1 unique routes

cytomegalovirus, cytomegaloviral

mononucleosis

with

complication NEC→B27.19

Mononucleosis, infectious1 unique routes

cytomegaloviral

with

complication NEC→B27.19

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 865

Viral Illness with MCC

DRG 866

Viral Illness without MCC

Cross Reference

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