Shopping CartYour Cart is EmptyQuantity: RemoveSubtotalTaxesShippingTotalThere was an error with PayPalClick here to try againThank you for your business!You should be receiving an order confirmation from Paypal shortly.Exit Shopping Cart Mark Detweiler MD Londonderry Gastroenterology Healing Beyond the Symptoms Contact Us By Using Our Portal!! Email(HIPA compliant),Appointments,registration,payments,upload your picture, and most important tell us what is wrong and your previous history Click Here for PortalMain Office 603-818-4712Office Fax: 603-260-6937Billing (Colleen): 603-744-9430Mobile Site Adress: m.markdetweiler.org Toggle NavigationHomeAbout UsContact UsLocation & HoursFormsHomeAbout UsContact UsLocation & HoursForms / PreviousNextPausePlayClose