Verification letters: primary-source proof on demand

What the letter has to confirm, and from whom

A license verification letter confirms four things straight from the board that issued your license: that it is active right now, in good standing, carries no unresolved disciplinary action, and its actual issue and expiration dates. The payer gets this directly from your board, never from a copy you hand over, because a self-submitted document is exactly the class of evidence primary-source verification exists to replace.

National credentialing standards call for verifying licensure directly with the issuing authority rather than accepting a copy from the applicant, alongside a parallel query of the National Practitioner Data Bank for malpractice payments and adverse licensure actions 1Ref 1National Committee for Quality Assurance (2026).Credentialing — NCQA.That national credentialing standards require primary-source verification of licensure directly with the issuing board, treat that verification as current only within a limited window, and repeat the cycle at recredentialing roughly every 36 months.2Ref 2Health Resources and Services Administration (2026).National Practitioner Data Bank.That the NPDB collects malpractice payments and adverse licensure actions and that individuals cannot query it themselves, supporting what a credentialing file checks beyond the license itself.. A scanned certificate emailed to a credentialing coordinator might satisfy an internal file, but it is not what a credentialing committee can rely on for a network decision — the committee needs the board's own record, pulled or requested independently, before your application can move forward.

Why your CAQH profile doesn't substitute

CAQH ProView is where most payers pull your self-reported credentialing data — license number, work history, malpractice history, practice locations — and it is genuinely useful for cutting down duplicate paperwork across payers. But CAQH itself does not verify anything; it is a data-collection portal, and the profile you attest to there is treated the same as any other self-report until a payer's credentialing staff separately confirms your license status with the board 3Ref 3CAQH (2026).CAQH.That CAQH ProView is a self-reported provider data portal, not itself a primary-source verification, supporting the CAQH-vs-verification distinction..

That distinction matters most the first time you're credentialed with a new payer: an up-to-date CAQH profile speeds the file along, but it does not replace the board-sourced letter or lookup a credentialing committee actually relies on to make its decision.

The 180-day window behind the timing

Primary-source verification isn't a one-time stamp — credentialing standards treat it as current for roughly 180 days, after which a credentialing committee needs it refreshed before it can rely on the file 1Ref 1National Committee for Quality Assurance (2026).Credentialing — NCQA.That national credentialing standards require primary-source verification of licensure directly with the issuing board, treat that verification as current only within a limited window, and repeat the cycle at recredentialing roughly every 36 months.. That window is why a letter your board issued eight months ago, sitting in an old application packet, doesn't help a new payer's credentialing cycle: the timestamp itself is part of what gets checked.

Practically, this means the best time to request a fresh verification letter or run an updated board lookup is close to when a payer's credentialing committee will actually meet on your file, not months in advance when the application first gets submitted. Ask the payer's credentialing coordinator when the committee meets, and time the request to land inside that window rather than guessing.

Requesting the letter from your board

Most state boards offer one of two paths: a real-time online license-lookup tool a payer can check directly, or a formal verification letter you request for a fee, typically mailed or emailed straight to the payer rather than to you. Which path your board offers, its fee, and its turnaround time are all board-specific — check your own board's site rather than assume another state's process.

The Maryland Board of Professional Counselors and Therapists 4Ref 4Maryland Board of Professional Counselors and Therapists (2026).Maryland Board of Professional Counselors and Therapists.That the Maryland Board of Professional Counselors and Therapists publishes its own license verification request procedure, as one state-specific example of a board maintaining this independently. and the Oklahoma State Board of Behavioral Health Licensure 5Ref 5Oklahoma State Board of Behavioral Health Licensure (2026).Oklahoma State Board of Behavioral Health Licensure.That the Oklahoma State Board of Behavioral Health Licensure publishes its own license verification request procedure, as a second state-specific example. each publish their own verification request procedure and fee independently, and neither should be assumed to match another state's timeline. A few states also layer state-mandated applications on top of the payer's own credentialing file — a form submitted to a state agency, separate from anything CAQH or the payer's process covers.

If a payer's request arrives as part of a broader post-payment review rather than routine credentialing, it may be riding alongside the takeback letter a payer sends when clawing back overpayments — a distinct process from a routine re-verification ask.

The exclusion checks that ride along

A license verification letter usually isn't the only primary-source check running in parallel: most credentialing files also confirm you're not on the OIG's List of Excluded Individuals and Entities, the federal database barring payment for services furnished by an excluded person 6Ref 6HHS Office of Inspector General (2026).Exclusions Program.That OIG's exclusion program bars federal program payment for services furnished by an excluded person and that the LEIE is the public check, supporting the exclusion-screening claim., and increasingly cross-check the parallel exclusion database SAM.gov maintains 7Ref 7U.S. General Services Administration (2026).SAM.gov.That SAM.gov is the federal exclusion/debarment database that complements the OIG LEIE in credentialing-grade screening.. Neither check is about your license status directly, but a payer that skips them isn't doing credentialing the way the standard describes.

The NPDB query mentioned earlier 2Ref 2Health Resources and Services Administration (2026).National Practitioner Data Bank.That the NPDB collects malpractice payments and adverse licensure actions and that individuals cannot query it themselves, supporting what a credentialing file checks beyond the license itself. covers a different slice again — malpractice payments and adverse licensure or privilege actions — and individuals cannot run that one themselves the way they can a board lookup or an OIG exclusion search; only authorized entities may query it directly. Between the board's verification, the NPDB query, and the exclusion screen, a single credentialing file draws on three separate federal and state sources, not one.

When this repeats: recredentialing and staying ahead of it

None of this is a one-time event. Recredentialing brings the same verification back around on a cycle — commercial credentialing standards call for it at least every 36 months 1Ref 1National Committee for Quality Assurance (2026).Credentialing — NCQA.That national credentialing standards require primary-source verification of licensure directly with the issuing board, treat that verification as current only within a limited window, and repeat the cycle at recredentialing roughly every 36 months. — so the license check, the NPDB query, and the exclusion screen all get redone, not just refreshed from memory. Treat the first credentialing cycle as the template for the next one rather than a one-off hurdle.

A board certification you hold on top of your license may carry its own renewal and verification cycle from the certifying board, running independently of your state license and your payer recredentialing — track all three on the same calendar rather than assuming one renewal covers the others. If your board separately flags you for the ce audit letter reviewing continuing-education compliance, that's a different board process again, distinct from a payer's credentialing request even though both start with the same board file.