Previously, this Cardiology Practice has billed 86510 for a Prothrombin Time blood test in the office, and if the results required a medication change and discussion with the patient, a 99211 was also charged. We would like to start the use of the 99363 (anti coag management, initial 8 visits) and 99364 (anticoag management, subs 3 visits). My question is, if the patient has already been seen previously and we have billed the 85610 and 99211 when applicable, can we now start billing the 99363, or would this billing only apply to new patients and not established patients?
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