Take a glance at HI Service identifier

Healthcare Identifier (HI) Service consists of three types of service identifiers:

• IHI
• HPI-I
• HPI-O

Each identifier contains 16 digit reference numbers. The identifier is created according to the International Standard [ISO7812: AS3523.1&2-2008]. You may get some ideas from wiki of ISO/IEC 7812.

The structure of the identifier has been divided into three sections:

Issuer Identification Number (1st - 6th digit):
The first 5 digits is set to be "80036" for healthcare industry.
The 6th digit will be used for types of service identifiers like IHI (defined as "0"), HPI-I (defined as "1") and HPI-O (defined as "2").

Individual Account Identification (7th -15th digit):
It contains the unique reference number.

Check Digit (16th digit):
It can be calculated using IIN and IAI. The calculation is based on the Luhn formula modulus 10 "double-add-double" check digit [ISO7812].

To assign a unique IHI, the following identifying information will be used:

• Name
• Date of birth
• Date of birth accuracy indicator
• Sex

Extra information may be included, like:

• Address (always included in verified IHIs)
• Birth plurality (where relevant, and for a designated period)
• Birth order (where relevant, and for a designated period)
• Date of death (if applicable)
• Date of death accuracy indicator
• Alias (multiple alias allowed)
• Trusted Data Source TDS identifier (Medicare Australia and Department of Veteran's Addairs identified as initial TDS)

Interim number, which can be generated at the point of care for unidentified individuals, is called provisional IHI or unverified IHI.

IHI can be classified as "verified", "unverified", "provisional", "deceased" or "retired". The HI Service will support classifications for those IHIs which are suspected or confirmed to be duplicate or replicate. An Evidence of Identity (EOI) process will be carried out to verify such initial information for the IHI.

The details of the concept of operation can be found here.