How to Obtain Credentialing with Highmark Using the CertifyOS Platform

Effective Aug. 3, 2026, Highmark will incorporate the CertifyOS platform into our credentialing and recredentialing processes for professional and organizational providers in Delaware.

What Is Changing

Professional Providers

Continue to enroll in our health plan by registering with the Council for Affordable Quality Health Care (CAQH) and continue to complete the Initial Credentialing Request Form; at the end of the form, you will be directed to the CertifyOS Initial Credentialing intake portal.

Organizational Providers

To start the initial credentialing process, complete The CertifyOS Initial Application for Facility and Ancillary Providers, which will be located on our Provider Resource Center (PRC) under Provider Network > Credentialing > Organizational Credentialing.

To recredential with Highmark, complete The CertifyOS Recredentialing Application for Facility and Ancillary Providers, also to be located on the PRC under Provider Network > Credentialing > Organizational Credentialing.

The CertifyOS portal, for initial credentialing and recredentialing for Delaware providers, will be available on Aug. 3.

Getting Started… with Certify

Once on the CertifyOS portal, set up your user account. Follow the prompts. You’ll need the following information, as applicable to your provider type:

• National Provider Identifier (NPI) number     
• CAQH ID
• Drug Enforcement Administration (DEA) number
• Board certification
• Proof of liability insurance
• Email address
• Resume or CV
• Social Security number

Important: All uploaded documents should be in PDF format.

To begin the credentialing process, providers must complete the Highmark Provider Application located within the CertifyOS intake portal.

Do I still need to complete the CAQH application?

Yes, you will need to complete the CAQH application. Be sure to add Highmark as an authorized plan or grant global authorization. We also ask that you keep your CAQH profile up to date for the purpose of recredentialing which must occur within 36 months of the last credentialing.

Will I need to provide additional documentation?

Some providers may need to supply additional documents — such as Proof of Malpractice Insurance, Certificate of Insurance (COI), or Licensure — relevant to the credentialing and re-credentialing process. If you receive a request for additional documents, we ask that you respond in a prompt manner.

By completing the CertifyOS and CAQH applications, am I now credentialed?

Your participation and ability to treat Highmark members doesn’t begin until you have successfully been credentialed and contracted by Highmark. Please do not see members or submit claims until you have been notified of acceptance into Highmark’s credentialed networks.

For more on our credentialing process, go here.