U.S. ICD-10-CM · FY 2027

Z20 ICD-10-CM Code: Contact with and (suspected) exposure to communicable diseases

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

Z20

Contact with and (suspected) exposure to communicable diseases

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where Z20 sits

  1. 1

    Chapter 21

    Factors influencing health status and contact with health services (Z00-Z99)

  2. 2

    Section

    Persons with potential health hazards related to communicable diseases (Z20-Z29)

  3. 3

    Category Z20

    Contact with and (suspected) exposure to communicable diseases

  4. 4

    Code Z20

    Contact with and (suspected) exposure to communicable diseases

More specific choices

Codes under Z20

Z20 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Z20.0

Contact with and (suspected) exposure to intestinal infectious diseases

Z20.1

Contact with and (suspected) exposure to tuberculosis

Z20.2

Contact with and (suspected) exposure to infections with a predominantly sexual mode of transmission

Z20.3

Contact with and (suspected) exposure to rabies

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

Z20.9

Contact with and (suspected) exposure to unspecified communicable disease

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for Z20.

Code first

No “code first” instruction is listed for Z20.

Use additional code

No “use additional code” instruction is listed for Z20.

Excludes1

Conditions that should not be reported together with this code.

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

Excludes2

Conditions not included here that may be reported separately when present.

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

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code Z20 mean?

Z20 is the FY 2027 U.S. ICD-10-CM code for “Contact with and (suspected) exposure to communicable diseases.”

Is Z20 a billable or specific ICD-10-CM code?

No. Z20 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is Z20 located in ICD-10-CM?

Z20 is listed in Chapter 21, Factors influencing health status and contact with health services (Z00-Z99), within Persons with potential health hazards related to communicable diseases (Z20-Z29) (Z20–Z29), under category Z20, Contact with and (suspected) exposure to communicable diseases.

What coding notes are listed for Z20?

No inclusion terms are listed for Z20 in this reference record. No code-first instruction is listed. Excludes1 notes: carrier of infectious disease (Z22.-); diagnosed current infectious or parasitic disease -see Alphabetic Index. Excludes2 notes: personal history of infectious and parasitic diseases (Z86.1-).

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