Z20.820 – Contact with and (suspected) exposure to varicella

ICD-10-CM 2027 diagnosis code · Persons with potential health hazards related to communicable diseases

Billable code

ICD-10-CM code Z20.820

Code: Z20.820 (claims format: Z20820)
Description: Contact with and (suspected) exposure to varicella
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 21. Factors influencing health status and contact with health services (Z00-Z99)
Block: Z20-Z29 Persons with potential health hazards related to communicable diseases
Parent codes: Z20 › Z20.8 › Z20.82

Notes inherited from parent codes

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

Z20 – Contact with and (suspected) exposure to communicable diseases

Excludes1 (not coded here):

carrier of infectious disease (Z22.-)
diagnosed current infectious or parasitic disease -see Alphabetic Index

Excludes2 (not included here):

personal history of infectious and parasitic diseases (Z86.1-)

Index terms for Z20.820

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

Related codes in Z20.82

Frequently asked questions

What is ICD-10 code Z20.820?

Z20.820 is the ICD-10-CM code for contact with and (suspected) exposure to varicella, in the block Z20-Z29 (Persons with potential health hazards related to communicable diseases).

Is Z20.820 a billable code?

Yes. Z20.820 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Z20.820 belong to?

It belongs to category Z20 – Contact with and (suspected) exposure to communicable diseases.

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.