How to contact portsmouth regional hospital in new hampshire? Serving the Seacoast Region in New Hampshire, Maine and Massachusetts. 603-436-5110. Portsmouth Regional is a 209-bed acute care hospital located in Portsmouth, NH offering a range of services, including emergency care, mental health, weight loss treatment and pregnancy and birth services.What is the name of the hospital in portsmouth? Portsmouth Regional is a 209-bed acute care hospital located in Portsmouth, NH offering a range of services, including emergency care, mental health, weight loss treatment and pregnancy and birth services.Is portsmouth regional hospital part of hca healthcare? Portsmouth Regional Hospital is a 220-bed acute care hospital located in Portsmouth, NH, and is part of HCA Healthcare, the nation's largest provider of healthcare services. Portsmouth Regional Hospital serves the seacoast region’s residents in New Hampshire, Maine and Massachusetts and is also one of the area’s largest employers.How do i register for surgery online at portsmouth regional hospital? To register online at Portsmouth Regional Hospital, sign in using your MyHealthONE account. Download the app today to manage all parts of your health easily and securely. Having trouble? Please contact us at: Click the "One Medical Passport" image below to be taken to an online preregistration page for surgery procedures.