| Code | Display | Definition | 
| consent  | 
Consent | 
An assertion of permission for an activity or set of activities to occur, possibly subject to particular limitations; e.g. surgical consent, information disclosure consent, etc. | 
| referral  | 
Referral | 
A request that care of a particular type be provided to a patient.  Could involve the transfer of care, a consult, etc. | 
| advevent  | 
Adverse Event | 
An undesired reaction caused by exposure to some agent (e.g. a medication, immunization, food, or environmental agent). | 
| aptmtreq  | 
Appointment Request | 
A request that a time be scheduled for a type of service for a specified patient, potentially subject to other constraints | 
| transfer  | 
Transfer | 
The transition of a patient or set of material from one location to another | 
| diet  | 
Diet | 
The specification of a set of food and/or other nutritional material to be delivered to a patient. | 
| adminact  | 
Administrative Activity | 
An occurrence of a non-care-related event in the healthcare domain, such as approvals, reviews, etc. | 
| exposure  | 
Exposure | 
Record of a situation where a subject was exposed to a substance.  Usually of interest to public health. | 
| investigation  | 
Investigation | 
A formalized inquiry into the circumstances surrounding a particular unplanned event or potential event for the purposes of identifying possible causes and contributing factors for the event | 
| account  | 
Account | 
A financial instrument used to track costs, charges or other amounts. | 
| invoice  | 
Invoice | 
A request for payment for goods and/or services.  Includes the idea of a healthcare insurance claim. | 
| adjudicat  | 
Invoice Adjudication | 
The determination of what will be paid against a particular invoice based on coverage, plan rules, etc. | 
| predetreq  | 
Pre-determination Request | 
A request for a pre-determination of the cost that would be paid under an insurance plan for a hypothetical claim for goods or services | 
| predetermine  | 
Predetermination | 
An adjudication of what would be paid under an insurance plan for a hypothetical claim for goods or services | 
| study  | 
Study | 
An investigation to determine information about a particular therapy or product | 
| protocol  | 
Protocol | 
A set of (possibly conditional) steps to be taken to achieve some aim.  Includes study protocols, treatment protocols, emergency protocols, etc. |