DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Z20 Contact with and (suspected) exposure to communicable diseases

  • Header · not billable

Z20 is not billable. The category heads 18 billable codes in FY2027, grouped under 10 subdivisions.

Index → code

  • Rabiescontact → Z20.3
  • Contact (with)HIV → Z20.6
  • Rabiesexposure to → Z20.3

Where it sits

  1. Chapter 21 Factors influencing health status and contact with health services (Z00-Z99)
  2. Z20-Z29 Persons with potential health hazards related to communicable diseases (Z20-Z29)
  3. Z20 Contact with and (suspected) exposure to communicable diseases
Billable codes
18
Subdivisions
10
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
89

Codes in Z20

  1. Z20.0
    Contact with and (suspected) exposure to intestinal infectious diseases
    Header
  2. Z20.01
    Contact with and (suspected) exposure to intestinal infectious diseases due to Escherichia coli (E. coli)
    Billable
  3. Z20.09
    Contact with and (suspected) exposure to other intestinal infectious diseases
    Billable
  4. Z20.1
    Contact with and (suspected) exposure to tuberculosis
    Billable
  5. Z20.2
    Contact with and (suspected) exposure to infections with a predominantly sexual mode of transmission
    Billable
  6. Z20.3
    Contact with and (suspected) exposure to rabies
    Billable
  7. Z20.4
    Contact with and (suspected) exposure to rubella
    Billable
  8. Z20.5
    Contact with and (suspected) exposure to viral hepatitis
    Billable
  9. Z20.6
    Contact with and (suspected) exposure to human immunodeficiency virus [HIV]
    Billable
    Excludes1 2

    Excludes1

    • asymptomatic human immunodeficiency virus [HIV]
    • HIV infection status (Z21) Z21
  10. Z20.7
    Contact with and (suspected) exposure to pediculosis, acariasis and other infestations
    Billable
  11. Z20.8
    Contact with and (suspected) exposure to other communicable diseases
    Header
  12. Z20.81
    Contact with and (suspected) exposure to other bacterial communicable diseases
    Header
  13. Z20.810
    Contact with and (suspected) exposure to anthrax
    Billable
  14. Z20.811
    Contact with and (suspected) exposure to meningococcus
    Billable
  15. Z20.818
    Contact with and (suspected) exposure to other bacterial communicable diseases
    Billable
  16. Z20.82
    Contact with and (suspected) exposure to other viral communicable diseases
    Header
  17. Z20.820
    Contact with and (suspected) exposure to varicella
    Billable
  18. Z20.821
    Contact with and (suspected) exposure to Zika virus
    BillableExempt
  19. Z20.822
    Contact with and (suspected) exposure to COVID-19
    Billable
    Inclusion terms 1

    Inclusion terms

    • Contact with and (suspected) exposure to SARS-CoV-2
  20. Z20.828
    Contact with and (suspected) exposure to other viral communicable diseases
    Billable
  21. Z20.89
    Contact with and (suspected) exposure to other communicable diseases
    Billable
  22. Z20.9
    Contact with and (suspected) exposure to unspecified communicable disease
    Billable

Sources of each column.

Instructions

At Z20

Excludes1

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

Excludes2

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

Notes that also apply

Chapter 21 instructions (Notes 3): printed on the chapter 21 page.

Index entries

  • Contact (with)Escherichia coli (E. coli) → Z20.01
  • Exposure (to)Escherichia coli (E. coli) → Z20.01
  • Contact (with)cholera → Z20.09
  • Contact (with)intestinal infectious disease NEC → Z20.09
  • Exposure (to)cholera → Z20.09
  • Exposure (to)intestinal infectious disease NEC → Z20.09
  • Contact (with)tuberculosis → Z20.1
  • Exposure (to)tuberculosis → Z20.1
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)contact → Z20.1
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)exposure (to) → Z20.1
  • Contact (with)gonorrhea → Z20.2
  • Contact (with)sexually-transmitted disease → Z20.2
  • Contact (with)syphilis → Z20.2
  • Contact (with)venereal disease → Z20.2
  • Exposure (to)gonorrhea → Z20.2
  • Exposure (to)sexually-transmitted disease → Z20.2
  • Exposure (to)syphilis → Z20.2
  • Exposure (to)venereal disease → Z20.2
  • Gonorrhea (acute) (chronic)contact → Z20.2
  • Gonorrhea (acute) (chronic)exposure to → Z20.2
  • Syphilis, syphilitic (acquired)contact → Z20.2
  • Syphilis, syphilitic (acquired)exposure to → Z20.2
  • Contact (with)rabies → Z20.3
  • Exposure (to)rabies → Z20.3
  • Rabiescontact → Z20.3
  • Rabiesexposure to → Z20.3
  • Contact (with)German measles → Z20.4
  • Contact (with)rubella → Z20.4
  • Exposure (to)German measles → Z20.4
  • Exposure (to)rubella → Z20.4
  • German measlesexposure to → Z20.4
  • Rubella (German measles)contact → Z20.4
  • Rubella (German measles)exposure to → Z20.4
  • Contact (with)viral hepatitis → Z20.5
  • Contact (with)AIDS virus → Z20.6
  • Contact (with)HIV → Z20.6
  • Contact (with)HTLV-III/LAV → Z20.6
  • Contact (with)human immunodeficiency virus (HIV) → Z20.6
  • Exposure (to)AIDS virus → Z20.6
  • Exposure (to)human immunodeficiency virus (HIV) → Z20.6

49 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy