Portal; Family Health Center of Southern Oklahoma. FHCSO – Tishomingo 610 E. 24th Street Tishomingo, OK 580-371-2343 www.fhcso.org. FHCSO – Atoka 1556 S Virginia Ave Atoka, OK 580-889-4746. FHCSO – Coalgate 107 E. Post Avenue Coalgate, OK 580-927-9876. FHCSO – Kingston 21 N. Main Kingston, OK.