Overview

Requisition number - A shared identifier common to all service requests that were authorized more or less simultaneously by a single author, representing the composite or group identifier. All services requests that were created as a part of a single episode of care will have the same requisition number.

Requirements

1. Must be the same for all entities (service requests) related to the single episode of care
2. Must be unique among all episodes of care
3. Not a sequence - so no-one can generate new Requisition based on knowledge of the existing one
4. Must be easy to read and pass a number to other person via any channel: orally, phone, sms
5. Must contain only numbers and some letters that looks the same in Cyrillic and Latin alphabet and can be entered via the phone keypad: A, B, C, E, H, I, K, M, O, P, T, X