The Healthcare Identifier tools are provided by Mr Russell Alexander McDonell to assist the Healthcare Industry and other interested parties in progressing towards conformance and compliance with regulatory and accreditation requirements.

For a discussion of the underlying standards and structures see Australian Health Identifiers

The tools and materials are provided free of charge on an "as is" basis, with no warranties of any kind.

The Validate tools only check the structure of the identifier and checksum if there is one.
To validate a real Australian Healthcare Identifier you should use the Services Australia Health Professional Online Services (HPOS) portal.

For definition of Australian National Healthcare Identifier structure and composition see IHI Pre-Implementation Project - Requirements Specification, Section 2.3.1 Healthcare Identifier Standards