Build, test, and debug regular expressions
This regular expression matches specific healthcare codes and identifiers, such as ARDRG (Australian Refined Diagnosis Related Groups), Hospital Provider Numbers, and Age Groups. It validates strings ending with formats like a letter-digit-letter combination, 3 digits and a letter, 7 digits and a letter, or a number range separated by a hyphen. It is particularly useful for parsing clinical datasets and verifying health administration records.