I was wondering if anybody can offer me some advice on guidelines for billing special services. In regards to billing for prolonged services (99954 and 99355)for a follow-up visit where you are mostly counseling the patient and family members. Or just for a regular office visit or consult. Also on codes 99000, with regards to handling specimens? We do a lot of tissue biopsies, can that be used for tissue and or culture swabs from excisions. And also on code 99051 or a 99058? We occasionally see patients on a saturday when our office is normally closed. Can that be billed in addition to the office visit? These special codes are new to me and I want to bill properly and get it right and see if I can utlitlize them. I appreciate any guidelines or suggestions anyone can offer...thanks!!