All inquiries for billing on or before 4/30/19 should go to Change Healthcare (1-866-896-7935) and all inquires on or after 5/1/19 should go to Healthcare Administrative Partners.

For Healthcare Administrative services:

Call Center Number: 800-889-4447  

Patient email: Patient@medpayment.net

Billing Address: PO Box 6750 Portsmouth, NH 03802

With respect to NSMC and PMA services please visit the following link: Https://Pay.Instamed.com/CWR                                                                              With respect to Merrimack Radiology and services at LGH, please visit the following link: Https://Pay.instamed.com/

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