Don't know where you are in NY so I am posting what I found:

New York:
Durkin 631-638-0800
Waldman 212-606-1015
Haider www.killpain.com
Hertz 212-523-6357
Northshore Hosp 516-496-6506

New Jersey
Getson (worked with Dr S and has great rep)
Zampella 973-285-7800
Camden (no doc name) 856-983-7246

As a word of warning.....prob not a good idea to mention your previous use of ketamine!!! They probably will not want to take you on. The K infusions are a little diff anyway.
If you do the outpatient they will give you a three hour infusion mixed with Versed and prob Ativan. In patient is 5 straight days. I know a doc that is not on there that does in patient. Richman in NYC.

Good luck to you...I hope you consider trying it.

Liz