Ha ha ha! Yea posts 8, 10 and 11 are suspicious, they have a common writing fashion! There definitely are some FAA/CASA/TC doctors around India who're money hungry.
To cover up all their rip-off fee and to make it seem like they're really doing something, they want you to run around with unnecessary medical tests, most are which are done by them that don't cost a fraction.
I've experienced that with a DGCA CLASS2/CASA/TC doctor in Chennai and I had to pay Rs. 7500 upfront which was meaningless but I couldn't help as that was the closest place that I could go to. Needless to say, I'm not going back!