SEACOAST KIDNEY & HYPERTENSION SPECIALISTS, P.L.L.C. ... 875 GREENLAND RD BUILDING C-UNIT 10 PORTSMOUTH, NH 03801-4164 US Tel: 603-436-3433 Fax: 603-427-5115. Business Mailing Address: ... (FT), Gastroenterology Nashua, NH, USA Understands limitations in dealing with patients over the phone, and involves nursing staff and providers. 5. ....