Interstate Medical Licensure Compact (IMLC) Overview

The Interstate Medical Licensure Compact (IMLC) is a voluntary agreement among participating U.S. states and territories that creates an expedited pathway for physicians to obtain medical licenses in multiple jurisdictions simultaneously. This page covers the IMLC's structure, eligibility criteria, operational mechanics, and the boundaries that define when the compact applies versus when standard individual state licensure processes govern. Understanding the IMLC is foundational to navigating telehealth licensure and interstate practice, particularly as remote care delivery across state lines becomes more structurally embedded in U.S. health systems.

Definition and Scope

The IMLC is an interstate compact — a legislatively enacted agreement that binds member states to a shared set of licensure standards and administrative processes for physician practice across state lines. It was developed under the auspices of the Federation of State Medical Boards (FSMB) and became operational in 2017. As of 2024, 40 states, the District of Columbia, and Guam participate in the compact (IMLC Commission).

The compact does not replace state medical licensure — it accelerates the process of obtaining full, independent medical licenses in multiple member states. Each license issued under the IMLC is a standard state medical license, carrying the same legal authority as a license obtained through the conventional application pathway. The IMLC Commission, a joint governmental agency established by the member states, administers the compact's central operations.

Scope is defined by two axes: the type of clinician and the practice context. The IMLC applies exclusively to physicians (MDs and DOs). It does not cover nurse practitioners, physician assistants, dentists, or other licensed health professionals — those disciplines have separate compacts (e.g., the Nurse Licensure Compact). Practice context includes in-person and telehealth settings; the IMLC makes no structural distinction between modalities, which is why it functions as a primary mechanism for multi-state telemedicine practice.

How It Works

The IMLC operates through a three-stage administrative process managed jointly between the physician's State of Principal License (SPL) and the IMLC Commission.

  1. Eligibility determination — The applying physician must designate one member state as their SPL, which is typically the state where they hold their primary medical license, conduct the majority of their practice, or maintain their primary residence. The SPL's medical board verifies eligibility.

  2. Eligibility requirements — To qualify, a physician must (IMLC Commission Eligibility):

  3. Hold a full, unrestricted medical license in the SPL
  4. Have graduated from an accredited allopathic (MD) or osteopathic (DO) medical school
  5. Have completed ACGME- or AOA-accredited graduate medical education
  6. Have passed each component of the USMLE or COMLEX-USA within three attempts
  7. Hold no current or pending disciplinary actions, criminal history, or license limitations

  8. Hold board certification by an ABMS or AOA member board (or meet an alternative pathway for SPL states that allow it)

  9. License issuance in intent states — Once the SPL verifies eligibility, the physician submits a single application through the IMLC Commission's online portal and designates the additional ("intent") states where licensure is sought. Each intent state's medical board then issues a full medical license under that state's laws. Processing time is typically reduced to 30 days or fewer, compared to 3–6 months for conventional applications through many state boards.

The IMLC Commission does not issue licenses itself. Regulatory authority remains with each individual state medical board, which retains full disciplinary jurisdiction over licensees practicing within its borders. This architecture preserves state sovereignty while reducing administrative friction.

Common Scenarios

The IMLC is most operationally relevant in three practice patterns:

Multi-state telehealth practice — A physician licensed in Texas (SPL) who delivers synchronous video consultations to patients in five other member states can obtain all five licenses through a single IMLC application rather than five separate state applications. This is directly relevant to synchronous vs asynchronous telehealth platforms that route patients across state lines based on provider availability.

Locum tenens and temporary coverage — Physicians providing short-term coverage at hospitals, clinics, or federally qualified health centers in states outside their primary practice state use the IMLC to hold valid, permanent licenses — not temporary permits — in each site state.

Specialist consultation networks — Subspecialty providers such as telestroke neurologists, teleradiology readers, and telepsychiatry physicians who read studies or consult on cases generated in multiple states require independent licensure in each state where the originating patient is located. The IMLC reduces the administrative barrier for maintaining a multi-state license portfolio.

Decision Boundaries

Understanding when the IMLC applies — and when it does not — requires attention to four classification boundaries.

Member vs. non-member states — Physicians can only obtain IMLC-expedited licenses in states that have enacted the compact into law. If a target state is not a member, conventional individual state licensure processes apply. The IMLC Commission's member state list is the authoritative reference; membership has changed over time as additional states pass enabling legislation.

Compact license vs. special purpose license — Some states offer special purpose telemedicine licenses or limited licenses for out-of-state practitioners. These are narrower instruments than full IMLC licenses and carry restrictions on scope, patient volume, or practice setting. A physician with an IMLC-issued full license in an intent state has unrestricted practice rights under that state's medical practice act; a special purpose license does not confer equivalent authority. Refer to state telehealth laws and policies for jurisdiction-specific distinctions.

IMLC vs. other health profession compacts — The IMLC governs only MDs and DOs. The Nurse Licensure Compact (NLC), administered by the National Council of State Boards of Nursing, governs registered nurses and licensed practical nurses under a different multistate license model. The Physical Therapy Compact, the Psychology Interjurisdictional Compact (PSYPACT), and the Audiology and Speech-Language Pathology Interstate Compact each operate under separate statutory frameworks with distinct eligibility criteria.

Disciplinary jurisdiction — Regardless of how a license was obtained, each state medical board retains independent authority to investigate and discipline physicians practicing within its jurisdiction. An adverse action in one IMLC member state triggers mandatory reporting to all states where the physician holds compact-issued licenses, per the compact's shared data infrastructure. This interconnected enforcement structure is distinct from conventional multi-state licensure, where disciplinary reporting obligations vary by state statute.

Physicians whose licenses carry any restriction, probationary status, or pending board action are ineligible for the IMLC pathway; those conditions must be resolved at the SPL level before a compact application can proceed. For context on how licensure intersects with telehealth provider credentialing and facility privileging requirements, those processes operate in parallel to — but independently from — state medical licensure.

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