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Main Offices
OneNet PPO
800 King Farm Boulevard, 6th Floor
Rockville, Maryland 20850
Tel: 1-800-884-5188
Fax: 1-866-563-6609
for general purpose inquiries
Business Hours
Our office hours are Monday through Friday, 8:30 a.m.
to 5:30 p.m. Eastern Standard Time.
OneNet Member Services representatives
and Professional Services representatives are available Monday
through Friday from 8:00 AM to 8:00 PM Eastern Standard Time.
All offices and departments 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*.
*When occurring on a Saturday or Sunday, these holidays are observed on the preceding Friday or subsequent Monday.
Telephone Numbers
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OneNet Member Services | 1-800-342-3289 |
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OneNet Professional Services (Providers) | 1-800-342-3289 |
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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
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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