B27.89 – Other infectious mononucleosis with other complication

ICD-10-CM 2027 diagnosis code · Other viral diseases

Billable code

ICD-10-CM code B27.89
Code
B27.89 (claims format: B2789)
Description
Other infectious mononucleosis with other complication
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
B25-B34 Other viral diseases
Parent codes
B27 › B27.8

Notes for B27.89

Applicable to:
  • Hepatomegaly in other infectious mononucleosis

Notes inherited from parent codes

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

B27 – Infectious mononucleosis

Includes:
  • glandular fever
  • monocytic angina
  • Pfeiffer's disease

Index terms for B27.89

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

Related codes in B27.8

Frequently asked questions

What is ICD-10 code B27.89?

B27.89 is the ICD-10-CM code for other infectious mononucleosis with other complication, in the block B25-B34 (Other viral diseases).

Is B27.89 a billable code?

Yes. B27.89 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does B27.89 belong to?

It belongs to category B27 – Infectious mononucleosis.

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.