ICD-10-CM Codes
Z00-Z99 Factors influencing health status and contact with health services
Z20-Z29 Persons with potential health hazards related to communicable diseases
Z20- Contact with and (suspected) exposure to communicable diseases
2021 ICD-10-CM Diagnosis Code Z20.820

2021 ICD-10-CM Diagnosis Code Z20.820

Contact with and (suspected) exposure to varicella

2016

2017

2018

2019

2020

2021

Billable/Specific Code

Z20.820 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2021 edition of ICD-10-CM Z20.820 became effective on October 1, 2020.
This is the American ICD-10-CM version of Z20.820 - other international versions of ICD-10 Z20.820 may differ.

The following code(s) above Z20.820 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to Z20.820:

Z00-Z99
2021 ICD-10-CM Range Z00-Z99
Factors influencing health status and contact with health services
Note
- Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
- (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
- (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.
Factors influencing health status and contact with health services
Z20
ICD-10-CM Diagnosis Code Z20
Contact with and (suspected) exposure to communicable diseases
Type 1 Excludes
- carrier of infectious disease (Z22.-)
- diagnosed current infectious or parasitic disease -see Alphabetic Index
Type 2 Excludes
- personal history of infectious and parasitic diseases (Z86.1-)
Contact with and (suspected) exposure to communicable diseases

Approximate Synonyms

Exposure to varicella
Exposure to varicella (chicken pox)

ICD-10-CM Z20.820 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):

951 Other factors influencing health status

Convert Z20.820 to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to Z20.820:

Contact (with) - see also Exposure (to)
- varicella Z20.820
Exposure (to) T75.89
- see also Contact, with
ICD-10-CM Diagnosis Code T75.89
Other specified effects of external causes
- varicella Z20.820

ICD-10-CM Codes Adjacent To Z20.820

Z20.4 Contact with and (suspected) exposure to rubella

Z20.5 Contact with and (suspected) exposure to viral hepatitis

Z20.6 Contact with and (suspected) exposure to human immunodeficiency virus [HIV]

Z20.7 Contact with and (suspected) exposure to pediculosis, acariasis and other infestations

Z20.8 Contact with and (suspected) exposure to other communicable diseases

Z20.81 Contact with and (suspected) exposure to other bacterial communicable diseases

Z20.810 Contact with and (suspected) exposure to anthrax

Z20.811 Contact with and (suspected) exposure to meningococcus

Z20.818 Contact with and (suspected) exposure to other bacterial communicable diseases

Z20.82 Contact with and (suspected) exposure to other viral communicable diseases

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

Z20.821 Contact with and (suspected) exposure to Zika virus

Z20.828 Contact with and (suspected) exposure to other viral communicable diseases

Z20.89 Contact with and (suspected) exposure to other communicable diseases

Z20.9 Contact with and (suspected) exposure to unspecified communicable disease

Z21 Asymptomatic human immunodeficiency virus [HIV] infection status

Z22 Carrier of infectious disease

Z22.0 Carrier of typhoid

Z22.1 Carrier of other intestinal infectious diseases

Z22.2 Carrier of diphtheria

Z22.3 Carrier of other specified bacterial diseases

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2021 ICD-10-CM Diagnosis Code Z20.820

Contact with and (suspected) exposure to varicella

Factors influencing health status and contact with health services

Contact with and (suspected) exposure to communicable diseases

Other specified effects of external causes