B27.09 – Gammaherpesviral mononucleosis with other complications
ICD-10-CM 2027 diagnosis code · Other viral diseases
ICD-10-CM code
B27.09
- Code
B27.09(claims format:B2709)- Description
- Gammaherpesviral mononucleosis with other complications
- 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 › B27.0
Notes for B27.09
Applicable to:
- Hepatomegaly in gammaherpesviral 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
B27.0 – Gammaherpesviral mononucleosis
Applicable to:
- Mononucleosis due to Epstein-Barr virus
Index terms for B27.09
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in B27.0
Frequently asked questions
What is ICD-10 code B27.09?
B27.09 is the ICD-10-CM code for gammaherpesviral mononucleosis with other complications, in the block B25-B34 (Other viral diseases).
Is B27.09 a billable code?
Yes. B27.09 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does B27.09 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.