In short…
- For a visual representation of which states are part of the IMLC, doctors can refer to the IMLC map below.
- The Interstate Medical Licensure Compact (IMLC) currently has 36 participating states that function as States of Principal License (SPLs). These states are actively managing applications and granting medical licenses through the compact.
- Physicians who fulfill all IMLC criteria can receive a Letter of Qualification (LOQ) from their designated SPL.
Becoming a locum tenens physician involves more than just finding a position that fits your personal and professional goals. One of the biggest challenges lies in navigating the licensing process, which is often both complicated and time-consuming. Imagine, however, if there were a way to cut through that red tape and gain the ability to practice in multiple states more efficiently. That’s exactly what the Interstate Medical Licensure Compact (IMLC) offers—a transformative system created to simplify multi-state licensing for physicians who are always on the move. In this guide, we’ll break down the IMLC in detail, explaining how it works and highlighting its potential to revolutionize how doctors deliver care across state boundaries.
What is a compact license?
A multi-state license through the Interstate Medical Licensure Compact (IMLC) allows qualified physicians to practice in multiple participating states with a single, streamlined application. The process starts by designating a State of Principal License (SPL), and once a doctor receives a Letter of Qualification (LOQ) from their SPL, they can quickly obtain licenses in other compact states without repeating the full application each time. This system saves providers time, cuts down on paperwork, and makes expanding their practice across state lines far more accessible.
What are the compact states?
As of August 2025, a total of 36 states—along with Washington, D.C., and Guam—participate in the IMLC as State of Principal License (SPL) members. This allows physicians licensed in these IMLC states to more easily apply for medical licensure in other compact states. Meanwhile, the rest of the country remains in different phases of adopting and implementing the IMLC, as shown on our IMLC map:
How to Obtain an IMLC License
Securing a medical license in another state through the IMLC is much simpler than applying individually to each state—provided you already hold a valid license in an IMLC member state that can serve as your State of Principal License (SPL) and you meet the compact’s eligibility requirements.
Eligibility Requirements for an IMLC License
To qualify for IMLC licensure, you must first designate an SPL, which becomes your “home base” for the compact. To claim a state as your SPL, you must meet at least one of the following:
- Your primary residence is in that state
- At least 25% of your medical practice occurs there
- You are employed by an entity in that state
- It is your state of residence for federal income tax purposes
In addition, physicians must:
- Hold a full, unrestricted license in the SPL
- Graduate from an accredited medical school—or one listed in the International Medical Education Directory
- Complete an ACGME- or AOA-accredited graduate medical education program
- Pass each part of the USMLE, COMLEX-USA, or equivalent within three attempts
- Maintain current or time-unlimited board certification through ABMS or AOABOS
- Have no history of disciplinary actions, criminal convictions, or controlled substance violations
- Not be under active investigation
Note: Not every member state can currently serve as an SPL. Refer to our map above or the official IMLC website for the most up-to-date list.
Application Process for an IMLC License
Physicians apply through the IMLC website. The application includes:
- Providing demographic and professional information
- Selecting your SPL
- Paying a $700 non-refundable administration fee
- Submitting fingerprints to your SPL’s designated agency for a background check
If you meet all requirements, your SPL will issue a Letter of Qualification (LOQ), granting you the ability to request licenses in other compact states.
Obtaining Additional IMLC State Licenses
Once you receive your LOQ, you may select other IMLC states where you want to be licensed. Each state processes the LOQ and issues a separate license. Typically, there is an additional $100 processing fee per state, payable to the IMLC.
After receiving your new license, you’ll need to renew it in each state as it expires, pay the required fees, and comply with any state-specific obligations, such as completing CME.
Find Locum Tenens Physician Jobs with Wellhart
At Wellhart, we offer locum tenens physician opportunities across all 50 states, giving you the chance to maximize the value of your IMLC license.
Ready to expand your medical career with locum tenens? Explore our job board for exclusive openings and apply today.
This article was originally written by Kurt Ullman and was updated by Liliana French in 2024. It was updated again in August 2025 by Mike Connors.