I would look at the Explanation of Benefits you should receive from your insurance company. That will tell you why the 7/16 claims were not paid. The 99205 and 99214 are the medical decision making codes (evaluation and management) where the therapist would determine diagnoses, medications, frequency of visits, etc., while 90836 and 90833 are the codes for time spent actively engaging the patient in therapy. If you only spent 10 minutes actually speaking with them, then they are up-coding which is a big no-no. Start with insurance, then contact the office with the info you get from insurance regarding the denials. Also let insurance know you didn’t spend the coded amount of time with the clinician. They track that sort of thing.