ICD-10-CM 2027
ICD-10 code for anthrax contact
From the official ICD-10-CM alphabetic index entry “Contact (with) › anthrax”. Page updated September 29, 2026.
About coding anthrax contact
The ICD-10-CM code for anthrax contact is Z20.810 (Contact with and (suspected) exposure to anthrax).
Within Z20.81 (contact with and (suspected) exposure to other bacterial communicable diseases), Z20.810 is specifically for contact with and (suspected) exposure to anthrax. Related codes cover meningococcus (Z20.811) and other bacterial communicable diseases (Z20.818).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 795 (Normal Newborn, relative weight 0.2022) and DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period) and MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about anthrax contact ICD-10 codes
What is the ICD-10 code for anthrax contact?
- Z20.810 — Contact with and (suspected) exposure to anthrax.
Is Z20.810 billable?
- Yes. Z20.810 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z20.810 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z20.810 a CC or MCC?
- No. Z20.810 is neither a CC nor an MCC under MS-DRG v44.0.