This Dr should be doing more for you than what it appears.
Giving you sleeping pills was nice, ..... BUT this is HIS 'work' that is needing the repairs!

AND for him to be collecting $ for all these office visits you are having to make!! Something doesn't smell right here.....

I work for a Radiation Oncologist and he gives daily treatments to his pts anywhere from 2 - 9 wks, depending on the severity of the cancer issue....A course of this tx is probably in the price range of these SCS implants......It goes without saying that any and all follow up care is considered 'content of service' of the course of Tx.......
The ONLY way he charges for an office visit call is if the office visit was 1 year post service.

I can not believe your doc is picking your pocket like this!!