Encounter for observation for other suspected diseases and conditions ruled out

• 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.

This category is to be used when a person without a diagnosis is suspected of having an abnormal condition, without signs or symptoms, which requires study, but after examination and observation, is ruled out. This category is also for use for administrative and legal observation status.

• contact with and (suspected) exposures hazardous to health (Z77.-)
• encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out (Z05.-)
• person with feared complaint in whom no diagnosis is made (Z71.1)
• signs or symptoms under study- code to signs or symptoms