Not sure how early/late they have appointments, but I would give Patel and Ramanan a good review. I especially like Dr Patel. Nice office on route 925.
Nice staff and a couple of nice PA's as well. I've read past reviews that the office staff can be snippy, but I never experienced that.
3575A Old Washington Road
Waldorf, MD
(301) 645-9650
They used to be on Post Office Road, so be sure if you are searching them on the internet that you are using their current address.