Referring a patient to another physician, or accepting a new one, often comes with an implicit assumption that the referring or receiving physician's license is in good standing. That assumption is usually correct, but it is easy enough to verify directly, and doing so has become a fairly routine part of due diligence in many practice settings.
Start with the state medical board
Every state maintains a licensing board with a public license lookup tool, and this is typically the most authoritative starting point. These lookup tools generally show whether a license is active, expired, or subject to any disciplinary action, along with the license's original issue date and expiration. Because each board maintains its own system, a physician licensed in multiple states will have a separate record in each state's database rather than one consolidated file.
Cross-reference with national data sources
Beyond individual state boards, national organizations aggregate some licensure and disciplinary information across states, which can be useful when a physician holds licenses in several jurisdictions. These aggregated sources are generally a helpful supplement rather than a replacement for the state board's own record, since the authoritative status of a license ultimately rests with the issuing state board.
A license lookup only tells part of the story — the issuing state board's own record remains the authoritative source.
What to look for beyond "active"
An active license status is the baseline, but it is often worth looking a layer deeper. Some boards note restrictions, probationary status, or conditions attached to a license even while it remains technically active. Board actions, when present, are typically summarized with a brief description and date, though full detail sometimes requires a separate records request. For referral purposes, checking whether a license carries any current restriction is generally more informative than confirming active status alone.
Timing and how often to re-check
License verification is not a one-time task for practices that maintain ongoing referral relationships. Because renewal cycles and board actions can change a physician's status between checks, many practices build periodic re-verification into their credentialing workflows rather than relying on a single point-in-time check performed at the start of a referral relationship.
License verification tools and the level of detail they provide differ from state to state. Requirements vary by state and change over time — always confirm current requirements directly with the relevant state board or agency before making a compliance decision.