Testing Locations » Montana » Hamilton MT » Catalyst Physical Therapy – Catalyst Physical Therapy – Drug Testing Only (Preferred) Catalyst Physical Therapy – Catalyst Physical Therapy – Drug Testing Only (Preferred) Catalyst Physical Therapy – Catalyst Physical Therapy – Drug Testing Only (Preferred)117 N 4Th St., Suite A2Hamilton, MT 59840-2400 United States PLEASE CALL FOR AN APPOINTMENT rn NO WALK-INS