State Licensing & the IMLC for Locum Tenens

The IMLC speeds licensing by letting a physician verify their credentials once and then reuse that verification to get a full license in any member state, instead of starting a fresh primary-source verification with every state board. The result is an average issuance of about 19 days - with roughly 51% of licenses issued within a week - versus the traditional several weeks to about six months for a stand-alone state application.

Here is the mechanism. You designate one State of Principal License (SPL) and complete a single qualification there. The compact then issues a Letter of Qualification (LOQ), valid for 365 days, that attests your credentials are verified. With an active LOQ you can request a full, unrestricted license in any other member state by paying that state's fee - no repeating the diploma, training, and exam verification each time. That front-loaded, build-once-use-many design is why the IMLC is the single biggest lever a locum physician (MD/DO) has to cut time-to-first-shift across several states.

Two clarifications that trip people up. First, the IMLC is not a single multi-state license - you still receive, hold, and separately renew a distinct license in each state. Second, it is physician-only: CRNAs and Anesthesiologist Assistants (AAs) cannot use it (see the profession comparison below). Cost is the $700 IMLC application fee paid once to the Compact Commission, plus each destination state's own license fee.

To use the IMLC you must hold a full, unrestricted medical license in an SPL-eligible member state and meet the compact's eligibility gates, the most commonly missed of which is board certification (or being within your initial board-certification timeframe). You also need a clean disciplinary and criminal history - no board action, no felony or controlled-substance conviction.

Your State of Principal License (SPL) is your entry point. You qualify in exactly one SPL, and to be eligible a state must be the place where at least one of the following is true: (a) it is your primary residence; (b) at least 25% of your practice occurs there (measured over the preceding six months); (c) your employer is located there; or (d) it is your state of residence for federal income tax purposes. This matters for locums because if you are constantly on the road, you generally anchor your SPL to your home or tax-residence state, not to a temporary assignment.

Two important limits. Hawaii and Vermont are member states but cannot serve as your SPL - you can still obtain a license *through* the compact in those states once you have qualified elsewhere. (Note: some sources also list Connecticut and Pennsylvania among states that cannot serve as the entry-point SPL, so confirm your specific entry state's status on imlcc.com before you build a plan around it.) And the compact only reaches member states: high-volume locum markets California and New York are not IMLC members in 2026, so the compact does nothing to speed licensing there - you file a traditional application instead. Florida, by contrast, joined the compact in 2024 and is a member.

As of June 2026 the IMLC covers 43 member states plus DC and Guam - about 45 jurisdictions. This number is genuinely volatile, so treat any count as a snapshot: Alaska's joining bill (HB110) passed both chambers on May 20, 2026 and would make it the 44th member once the governor signs, and published counts in 2026 range from 42 to 44 depending on how recently a source was updated and whether it counts pending states. Re-verify the current member count at publish.

The practical takeaway for a locum is to check membership *before* you build your licensing plan around the compact. There are roughly eight to nine states outside the compact as of mid-2026 - including the locum-heavy California and New York - and for those you will use a traditional state-board application with its own (often longer) timeline and fees. Florida and Texas, by contrast, ARE members (Florida joined in 2024). So the IMLC can dramatically compress a multi-state license plan that runs through member states, while leaving your non-member targets on the slower track. Plan both paths in parallel rather than assuming the compact reaches everywhere you want to work.

Often, but not always. A DEA registration is tied to a physical practice location, not to you nationally, so practicing in a new state generally requires a DEA registration for an address in that state - a new registration costs $888 per 3-year period (the same fee for an initial Form 224 and for renewal; the certificate is valid for 36 months). For a locum hopping between states, paying a fresh $888 for each short stint adds up fast.

There are cheaper, legitimate alternatives for short assignments. If you are already licensed and (where required) state-controlled-substance-registered in the new state, the DEA offers a free address-change to move your existing registration, and many facilities let locums prescribe under the facility's institutional DEA registration while on site. So do not assume you always need a second $888 registration - confirm with the agency and facility how controlled-substance prescribing will be handled before you pay for a new one.

A separate, easily conflated requirement: many states require their own state controlled-substance registration (CSR/CDS) in addition to the federal DEA registration - roughly half of states, each with its own fee and renewal cycle. A state CSR is not the same as a DEA registration, and where a state requires one you typically need it before the DEA address change or registration can post to that location.

No. The IMLC is physician-only (MD/DO), so neither CRNAs nor AAs can use it, and there is no equivalent operational compact for either profession in 2026.

CRNAs are not covered by the RN-only Nurse Licensure Compact. The compact that would cover them - the APRN Compact (which also covers NPs, CNMs, and CNSs) - has been enacted in only 5 states (DE, ND, SD, UT, WY) and needs 7 to activate, so it is not yet operational. Until it goes live (plausibly late 2026 or 2027), CRNAs need an individual state license in every state where they work, with timelines and fees that vary by state.

Anesthesiologist Assistants (AAs) have it tightest: there is no compact at all, and AAs are licensed or recognized in only about 20 to 24 jurisdictions (several of those through delegatory authority rather than a standalone license). Critically, the profession has no interstate reciprocity - adding a state means meeting that state's own licensure or recognition requirements from scratch (NCCAA certification is the common basis), and AAs always practice under anesthesiologist direction. For CRNAs and AAs, then, multi-state expansion is a state-by-state project - the credentialing, contract, and tax mechanics are the same as for physicians, but the licensing reach is not.

Multi-state licensing is one of the biggest time and cost drivers in getting to a first locum shift, and the good news is that agencies usually front much of it - but only for the assignment they are actually staffing.

On cost: each state sets its own medical-license fee, which ranges widely (illustratively from roughly $140 to $1,300+ depending on the state and whether it is an initial application or a renewal), on top of the $700 one-time IMLC application fee for physicians using the compact. Add possible state controlled-substance registration and per-state renewal cycles, and the administrative load - not clinical skill - is what most often gates time-to-first-shift.

On who pays: locum agencies are paid by the facility, not by you; they bill the facility an hourly rate and the spread covers credentialing, licensing, travel, housing, malpractice, and recruiter cost. In practice, agencies typically cover or front the state license application fee, FCVS, verification and delivery fees, and the IMLC fee for the assignment they are placing you in, and they have in-house licensing teams to manage the paperwork. The negotiation point is **speculative or extra licenses for *future* assignments - those are handled case-by-case and are often not automatically covered, so get it in writing (see the negotiation guide). Importantly, any license obtained for one agency's assignment is your own and portable** - it stays with you and can be used for other work, including assignments through other agencies.