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

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)

• V01.81 Contact with or exposure to anthrax

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 Z20.810

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 Z20.810

• Contact (with) › anthrax
• Exposure (to) › anthrax

Nearby codes

• 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 (this code)
• 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