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Main Offices
OneNet PPO
800 King Farm Boulevard, 6th Floor
Rockville, Maryland 20850
Tel: 1-800-884-5188
Fax: 1-866-563-8071
 for general purpose inquiries
Hours of Operation
Our office hours are 8:00 a.m. to 5:30 p.m. Eastern Time, Monday through
Friday.
Our offices are closed on the following holidays: New Years Day, Martin
Luther King, Jr. Day, Memorial Day, Independence Day, Labor Day, Thanksgiving
and the day after Thanksgiving, Christmas Day.
Member Services and Professional Services representatives are available
by phone 24 hours a day, 365 days a year.
Telephone Numbers
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OneNet Member Services | 1-800-342-3289 |
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OneNet Professional Services (Providers) | 1-800-342-6141 |
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OneNet Utilization Management | 1-800-962-0643 |
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MAPSI Behavioral Health Utilization Management | 1-800-282-6565 |
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OneNet Account Management, Sales and Accounting | 1-800-884-5188 |
OneNet PPO & MAPSI Behavioral Health Claims Address
P.O. Box 934
Frederick, Maryland 21705
OneNet Workers Compensation Claims Address
P.O. Box 939
Frederick, Maryland 21705-0939
Reminder: Providers should submit all workers compensation claims directly
to the patient’s employer, workers compensation administrator or
workers compensation insurance carrier. The employer, workers compensation
administrator or workers compensation insurance carrier will send the
claim to OneNet.
Access Fee Payment Address
OneNet PPO, LLC
P.O. Box 752232
Baltimore, Maryland 21275
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