Z20.1 Contact with and (suspected) exposure to tuberculosis

Billable ICD-10-CM code, FY2026.

Applies from Z20 Contact with and (suspected) exposure to communicable diseases

Excludes1 (never code together)

• 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-)

MS-DRG index

Defines the logic of DRG(s) 795 in MDC 15.

Approximate ICD-9-CM (GEMs)

• V01.1 Contact with or exposure to tuberculosis

Medicare Code Edits (MCE v43.1 (April 2026))

• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Code annotations containing back-references to Z20.1

Back-references to Z20

• Type 2 Excludes: Z77 Other contact with and (suspected) exposures hazardous to health ("contact with and (suspected) exposure to communicable diseases (Z20.-)")
• Type 2 Excludes: Z83 Family history of other specific disorders ("contact with and (suspected) exposure to communicable disease in the family (Z20.-)")

Diagnosis Index entries for Z20.1

• Contact (with) › tuberculosis
• Exposure (to) › tuberculosis
• Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) › contact
• Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) › exposure (to)

Nearby codes

• Z20 Contact with and (suspected) exposure to communicable diseases
• Z20.0 Contact with and (suspected) exposure to intestinal infectious diseases
• Z20.01 Contact with and (suspected) exposure to intestinal infectious diseases due to Escherichia coli (E. coli)
• Z20.09 Contact with and (suspected) exposure to other intestinal infectious diseases
• Z20.1 Contact with and (suspected) exposure to tuberculosis (this code)
• 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]