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Evolent Specialty Services, Inc.

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Evolent Specialty Services, Inc. (Evolent), formerly known as National Imaging Associates, Inc. (NIA), is responsible for prior authorization for advanced imaging services and cardiac imaging.

Prior authorization requests must be submitted to Evolent online or by phone as follows. Evolent does not accept fax submissions.

www.RadMD.com (24 hours a day, seven days a week, except when maintenance is performed once every other week after business hours)

Evolent Specialty Services Contact Information
PRODUCT
HOURS OF OPERATION
PHONE NUMBER
Commercial 
Monday through Friday, from 8 a.m. to 8 p.m.
Medi-Cal
Monday through Friday, from 8 a.m. to 8 p.m.
Last Updated: 08/07/2024