Are there any doctors here that are located in pa or maryland that legally prescribe ketamine or some other nmda drugs for severe depression?

While You Might: find a doctor on HealthTap that does this treatment, this is not something that any HealthTap doctor can prescribe for you without an office visit and a full work-up since it is a controlled substance. Look for a psychiatrist that in your area or ask you primary care MD for a referral (or insurance company) for better luck in finding someone to help.