Thank you for your interest!

Whether you reach out via phone, email or the brief contact form below, rest assured that you will receive the same prompt, personal service that our members expect and enjoy.


MSO®, Inc. (The Mutual Service Office, Inc.)
139 Harristown Road
Suite 100
Glen Rock, NJ 07452

Hours of operation:
8:00am – 4:00pm, Eastern Time, Monday through Friday
Telephone: (800) 935-6900
(201) 447‐6900

Fax: (201) 447-9468

Tell us about your business

To ensure the correct MSO associate responds to your inquiry, please complete the fields below and click SEND.

    Your Name (required)

    Your Email (required)


    Your Message

    MSO does not sell, rent, or lease customer information (including customer phone numbers) to third parties.