I am looking for an osteopath in Manhattan.

Hello fra2002-ga,

You can find many osteopaths in Manhattan using online yellow pages. 
Here are the results for two searches of major yellow pages:

"Physicians & Surgeons-Osteopathic"
Switchboard.com
http://www.switchboard.com/bin/cgidir.dll?MEM=1&PR=108&cid=1&LNK=53%3A1&QV=02FA2F043821363F70313203O01F6674A8821363F15313203O03F52D3D9821363FA7303203&C=Physicians+%26+Surgeons-Osteopathic&L=&A=&T=New+York+City&S=Ny&SAS=0&Search.x=48&Search.y=10

"All categories related to 'Osteopathic Physicians'"
SuperPages.com
http://yellowpages.superpages.com/listings.jsp?SRC=portals&STYPE=S&PG=L&CB=1&R=N&C=Osteopathic+Physicians&cbdt=Osteopathy&T=New+York+City&S=NY&search=Find+It&RT=&RS=&RR=

I hope that this information is helpful.

- justaskscott-ga


Search strategy -

Searched on Google for:

"yellow pages"

Browsed yellow pages to find osteopathic categories, and searched in
the relevant categories for listings in New York, NY