99490 is the highest CPT code.
99999 does not exist. It is not a valid CPT. Sorry.
CPT code 99999 is a placeholder code used in the Current Procedural Terminology (CPT) coding system to indicate an unlisted service or procedure. It is typically used when a specific code does not exist for a particular service, allowing healthcare providers to report the service while indicating that further detail should be provided. This code helps ensure accurate billing and documentation for unique or rare procedures not covered by existing codes.
As of Jan 2012, code 73542 is an invalid CPT code.
AS far as I could tell from the CPT code book that is not a valid code
magnesium level
What is proc code 58970
CPT Code 99223- Initial hospital care, per day, for the evaluation and management of a patient.
Total carbamazepine level
one of two types of cpt codes. stand alone codes give a full description
Periodic comprehensive preventive medicine
sacrum and coccyx
stand-alone
A Stand alone code is a CPT code that full description of the situation that you are coding. Ex. 26010 Drainage of finger abscess