Encounter for antibody response examination

• Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
• (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
• (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

examinations related to pregnancy and reproduction (Z30-Z36, Z39.-)

Nonspecific abnormal findings disclosed at the time of these examinations are classified to categories R70-R94.

routine examination of specific system

• 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)

• encounter for laboratory and radiologic examinations as a component of general medical examinations (Z00.0-)
• screening examinations (Z11-Z13)

Codes from category Z01 represent the reason for the encounter. A separate procedure code is required to identify any examinations or procedures performed