Mailing Address – All Correspondence 335 West Butler Avenue Chalfont, PA 18914
Contact Us Through Our Secure Form
Call Center
Phone: (215) 996-3700 Fax: (215) 996-3710
Outside Calling Region: (800) 86-MSDCU [800-866-7328]	Monday- Thursday: 9:00 a.m. - 5:00 p.m. Friday: 9:00 a.m. - 6:00 p.m. Saturday: 9:00 a.m. - 12:00 p.m.
Chalfont Branch
335 West Butler Avenue Chalfont, PA 18914 view map Fax: (215) 996-3728	Monday- Thursday: 9:00 a.m. - 5:00 p.m. Friday: 9:00 a.m. - 6:00 p.m. Saturday: 9:00 a.m. - 12:00 p.m.
Collegeville Branch
130 West Main Street Trappe, PA 19426 view map Fax: (215) 996-3831	Monday- Thursday: 9:00 a.m. - 5:00 p.m. Friday: 9:00 a.m. - 6:00 p.m. Saturday: 9:00 a.m. - 12:00 p.m.
Lansdale Branch
333 South Broad St. Lansdale, PA 19446 view map Fax: (215) 361-7248	Monday- Thursday: 9:00 a.m. - 5:00 p.m. Friday: 9:00 a.m. - 6:00 p.m. Saturday: 9:00 a.m. - 12:00 p.m.
Harleysville Branch
665 Main Street Harleysville, PA 19438 view map Fax: (866) 663-0375	Monday- Thursday: 9:00 a.m. - 5:00 p.m. Friday: 9:00 a.m. - 6:00 p.m. Saturday: 9:00 a.m. - 12:00 p.m.
Merck ID is required to access the following locations:
West Point Branch
P.O. Box 4, WP53F-102 West Point, PA 19486 Fax: (866) 316-5828	Monday- Thursday: 9:00 a.m. - 5:00 p.m. Friday: 9:00 a.m. - 6:00 p.m.
Upper Gwynedd Branch
P.O. Box 1000, UG2-CU North Wales, PA 19454 Fax: (866) 806-2761	Monday- Thursday: 9:00 a.m. - 5:00 p.m. Friday: 9:00 a.m. - 6:00 p.m.