Highmark PA Credentialing: CertifyOS, CAQH, and Contracts
By George Ruan • October 7, 2026
Last reviewed: October 7, 2026.
To credential a clinician with Highmark in Pennsylvania, attest their CAQH profile with Highmark authorized, then submit one practitioner intake through the CertifyOS provider portal. A clinician joining an existing group does not need a separate add-to-group form; Highmark uses the group information in CAQH. The clinician can see Highmark members only after the agreement is fully executed and a welcome letter gives the participation effective date.
Sections
The Sequence, Start to Finish
Clean up CAQH first. Update and re-attest the profile and authorize Highmark. Make sure the group practice location is present and current, and that the name matches the license exactly.
Answer Highmark’s prerequisites questionnaire. Highmark’s professional credentialing page routes you through a short form. It asks whether you applied before, whether the group already has a billing (assignment) account, and whether CAQH is current. For Pennsylvania it points to the CertifyOS portal.
Submit the CertifyOS intake once. The practice’s portal account adds the practitioner by name, NPI, and email, then completes the application: practitioner details including the group NPI, degree and specialty, credentialing contact, practice location, mailing address, and a signed attestation. Highmark publishes a CertifyOS portal user guide.
Watch the credentialing contact’s inbox. Highmark sends a “credentialing process initiated” letter, then any “Action Required” requests for missing items.
Sign and return the agreement, then wait for the welcome letter. Participation starts on the date that letter confirms.
Joining a Group vs. Creating a New Billing Practice
Highmark calls the billing-practice record an Assignment Account. For a clinician joining a group that already has one, Highmark’s prerequisites form says it will use the group information in CAQH instead of the older add-a-practitioner form.
The separate Request for Assignment Account form is for a new billing practice. That form tells you to choose “Create a new billing practice” when you are changing your tax ID or adding a new group NPI. It also warns that the record’s effective date is not necessarily the network effective date, which depends on contract execution and credentialing approval.
Requests Highmark Sends After You Submit
Highmark’s Provider Information Management team emails numbered “Action Required: Update Needed” notices. The one we see most often for behavioral health asks for a 24/7 coverage form. Highmark requires members to reach the provider or a designee at any hour, with a response within 60 minutes. Acceptable answers include:
an answering service, pager, or phone reaching the provider or a same-specialty designee
a provider-issued cell phone
an answering machine with callback from the provider or designee
after-hours messages answered within 60 minutes
For behavioral health providers, a crisis line alone is not acceptable unless the provider or designee can also be reached directly, and individualized crisis plans must be in place. Highmark warns that vague answers delay credentialing and that unanswered requests can end the application.
Where Highmark Applications Go Wrong
Working Highmark Pennsylvania applications for group practices, we have seen these problems repeatedly:
The agreement lists the wrong group NPI or tax ID. The CertifyOS intake has a group NPI field but no tax ID field. When CAQH lists locations under more than one tax ID, as it often does after a practice changes its EIN, the issued agreement can come back with the wrong identifiers. We have seen the clinician’s individual NPI printed as the group NPI. Before anyone signs, compare every agreement in the packet against what you submitted.
Asking the wrong team to fix it. CertifyOS support told us that correcting an issued Highmark Pennsylvania agreement is outside its credentialing scope and must go to Highmark Provider Services. Highmark’s Contact Us page lists Provider Service numbers by region and Provider Live Chat through Availity. Don’t resubmit the intake to force a correction.
Shared practice emails. Each practitioner added in CertifyOS needs a unique email address. A practice alias already used for one clinician is rejected for the next, so use the clinician’s own email there and keep the alias as the credentialing contact.
Duplicate or early submissions. Highmark asks for one submission per practitioner and says duplicates slow processing. Its guidelines also say the start date cannot be more than six weeks before the application date.
“Credentialing Approved” is not a start date. Highmark’s letters say participation begins only once a fully executed Commercial or Medicare Advantage agreement is in place. The welcome letter sent with it confirms the effective date. Hold claims until you have that letter.
How Long It Takes and How to Check Status
Highmark’s prerequisites form states an internal goal of 45 days after a complete application. Its credentialing status reference guide has cited a 60-day goal and warned that backlogs can stretch processing to 180 days. Check status in Availity or through the inquiry form on Highmark’s credentialing page. Use the provider portal or Provider Information Management forms for later demographic changes. Updating CAQH alone does not change Highmark’s records.
Related: set up and complete your CAQH profile, change your EIN with insurance companies, and Highmark’s commercial telehealth coding changes. Bomi checks issued agreements against the submitted application as part of our credentialing service.
Frequently Asked Questions
Does a CAQH attestation submit my Highmark application?
No. CAQH supplies the data, but the request itself is the CertifyOS practitioner intake. Without that intake, nothing is under review.
Do I need a form to add a new clinician to my existing Highmark group?
Not usually for an initial applicant. Highmark takes the group details from CAQH. The new-billing-practice form is for a new group, a tax ID change, or a new group NPI.
Our Highmark contract shows the wrong NPI or tax ID. Who fixes it?
Highmark, not CertifyOS. Contact Highmark Provider Services with the agreement details and the identifiers you expected, and do not sign the incorrect version.
When can my clinician start seeing Highmark members?
On the participation effective date in Highmark’s welcome letter, which comes after the agreement is fully executed. Approval status in the portal is not enough.
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