Z01.84 Encounter for antibody response examination
Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.
Applicable to
Encounter for immunity status testing
Excludes1 (never code together)
encounter for allergy testing (Z01.82)
Applies from Z01 Encounter for other special examination without complaint, suspected or reported diagnosis
Includes
routine examination of specific system
Excludes1 (never code together)
encounter for examination for administrative purposes (Z02.-)
encounter for examination for suspected conditions, proven not to exist (Z03.-)
encounter for laboratory, radiologic and imaging examinations for sign(s) and symptom(s) - code to the sign(s) or symptom(s)
Excludes2 (not included here)
encounter for laboratory and radiologic examinations as a component of general medical examinations (Z00.0-)
screening examinations (Z11-Z13)
Notes
Codes from category Z01 represent the reason for the encounter. A separate procedure code is required to identify any examinations or procedures performed
MS-DRG index
Defines the logic of DRG(s) 951 in MDC 23.
Approximate ICD-9-CM (GEMs)
V72.61 Antibody response examination
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 Z01.84
Back-references to Z01.84
Type 1 Excludes: Z01.82 Encounter for allergy testing ("encounter for antibody response examination (Z01.84)")
Back-references to Z01
Type 1 Excludes: Z02.7 Encounter for issue of medical certificate ("encounter for general medical examination (Z00-Z01, Z02.0-Z02.6, Z02.8-Z02.9)")
Type 2 Excludes: Z71.84 Encounter for health counseling related to travel ("encounter for other special examination without complaint, suspected or reported diagnosis (Z01.-)")