Next Step Rehab Solutions LLC Share: Physical Therapy Next Step Rehab Solutions LLC PO Box 287 8410 Maplewood Drive Gasport, NY 14067 (716) 266-5252 (716) 546-2223 (fax) About About Next Step Rehab Solutions LLC is a physical therapy service providing consultation and personalized treatment by Kelly Gaygen, PT in the convenience of the client’s home.