| Lvl | Code | Display | Definition |
| 1 | provider-src | Provider-sourced | The metric information was captured from the provider system's perspective |
| 1 | payer-src | Payer-sourced | The metric information was captured from the payer system's perspective |
| 1 | intermediary-src | Intermediary-sourced | The metric information was captured from the intermediary system's perspective |
| 1 | changed | Changed | Previously sent information has been changed. |
| 1 | added | Added | New information that was not sent previously. |
| 1 | patientEvent | Patient Event | Information about the dates of the event that are being requested. |
| 1 | admissionDates | Admission Dates | Information about the admission dates of a hospital admission being requested. |
| 1 | dischargeDates | Discharge Dates | Information about discharge dates of a hospital admission being requested. |
| 1 | additionalInformation | Additional Information | Send additional paperwork or supporting information for the request. |
| 1 | freeFormMessage | Free Form Message | Send text messages to the UMO. |
| 1 | institutionalEncounter | Institutional Encounter | Information about a hospital claim being requested. |
| 1 | result-available | Result Available | A new result for a PAS submission is now available. |
| 1 | admitting | Admitting | The diagnosis given as the reason why the patient was admitted to the hospital. |
| 1 | principal | Principal | The single medical diagnosis that is most relevant to the patient's chief complaint or need for treatment. |
| 1 | patientreasonforvisit | Patient Reason For Visit | The diagnosis given as why the patient came to the hospital. |
| 1 | CDEX | CDex Submit-Attachment | Via a CDex Submitt-Attachment operation |
| 1 | attachment-request-code | Attach Request Code | Attachments are identified by LOINC or PWK01 codes |
| 1 | attachment-request-questionnaire | Attachment Request Questionnaire | Attachments are identified by a questionnaire |
| 1 | priorAuthorization | Prior Authorization Information Request | Additional information is needed to determine response for a prior authorization |
| 1 | payer-url | Payer URL | The Payer Endpoint URL needed to submit attachments |
| 1 | attachments-needed | Attachments Needed | Communicates what attachments are needed |
| 1 | questionnaire-context | Questionnaire Context | Communicates the context of questionnaires that are needed |
| 1 | _reqcat | Requirements Categories | Codes that help to categorize requirements statements |
| 2 | business | business | Requirements relating to the business operations of the entities responsible for a system |
| 2 | exchange | exchange | Requirements relating to when or how data is exchanged with other systems |
| 2 | processing | processing | Requirements related to how data is dealt with internally to a system |
| 2 | storage | storage | Requirements relating to when or how data is or is not persisted within a system |
| 2 | privacy | privacy | Requirements relating to the privacy and security of data within a system |