Dr. David Gerald Johnston Dr. David Gerald Johnston 1796 Summer Street Halifax, Nova Scotia, B3H 3A7 Tel: 902-473-2085 Fax: 902-473-7239 Halifax Surgeons Nova Scotia Surgeons Joint Replacements Surgical Wait Times Back Pain National Surgeon Directory Non-Surgical Treatment Private Surgery Surgical Wait Times Joint Replacements Back Pain Orthopaedic Triage