Under US law, the interpreting radiologist must hold a medical license in the state where the patient is located at the time of the exam, because the practice of medicine legally occurs where the patient is. The ACR practice standard goes further: the radiologist should be licensed both in the state where the study was performed and the state where the interpretation is rendered. AstraRad is built around that rule. Every one of the 600,000 studies we read each year is matched to a board-certified, fellowship-trained subspecialist licensed in the state where the patient is located, and we manage the licensing and credentialing work so your facility never has to.
This page explains the general rule, the Interstate Medical Licensure Compact that makes broad coverage practical, how state pathways differ, and exactly what AstraRad handles for clients.
Where must a teleradiologist be licensed?
The default rule across US telemedicine is consistent: licensure follows the patient. A radiologist in Denver reading a CT performed in Tampa is practicing medicine in Florida and needs the authority to do so under Florida law. For teleradiology specifically, ACR standards expect licensure in both states, the one where the study was performed and the one where the read is rendered.
One nuance causes recurring confusion. The Medicare Program Integrity Manual states that, for Medicare billing purposes, the interpreting physician is not required by Medicare to be licensed in the state where the exam was performed. That is a billing rule, nothing more. State medical practice acts still govern who may practice on patients in that state, and a Medicare billing provision does not exempt anyone from them. Any teleradiology vendor citing the CMS rule as a licensure workaround is giving you compliance risk, not coverage.
The practical takeaway for an imaging center director or hospital administrator evaluating vendors: ask where the radiologists who will actually sign your reports are licensed. The answer must include your state. See how to choose a teleradiology company for the full vendor checklist.
What is the Interstate Medical Licensure Compact?
The Interstate Medical Licensure Compact (IMLC) is the reason a national teleradiology group can maintain broad state coverage without years of paperwork. As of mid-2026 the compact covers 44 states plus Washington DC and Guam, with Alaska becoming the 44th member state in June 2026.
Three things matter about how it works:
- It is an expedited pathway to a full license, not a limited or telehealth-only credential. Each member state still issues its own complete medical license.
- It is fast. Qualified physicians typically receive compact licenses in roughly 2 to 4 weeks, versus 8 to 16 or more weeks for traditional applications.
- Eligibility is strict. Physicians need an unrestricted license in a State of Principal License, board certification, and a clean disciplinary record, which means compact-licensed radiologists arrive pre-vetted.
A few caveats: Hawaii and Vermont participate but cannot serve as a State of Principal License, and California, New York, Oregon, South Carolina, and Virginia have no active IMLC pathway as of mid-2026. In non-compact states, licensure runs through the traditional state board process, which is slower but entirely workable for a group that maintains a dedicated licensing operation. The federal telehealth licensure overview at telehealth.hhs.gov is a useful plain-English reference.
Telehealth registrations vs full-license-only states
States split into two camps. Some offer a telehealth-specific registration or certificate that lets an out-of-state physician practice on their patients remotely without a full license. Others require the full license, period. The six states we cover in depth illustrate the range:
| State | Full license required for final reads? | Telehealth alternative | IMLC member? |
|---|---|---|---|
| Texas | Yes | None open to new entrants since 2017 | Yes, live since March 2022 |
| Florida | No, if registered | Out-of-State Telehealth Provider Registration (Fla. Stat. 456.47) | Yes, joined March 2024 |
| California | Yes | None | No |
| New York | Yes | None | No |
| Colorado | No, if registered | Out-of-state telehealth registration (SB 24-141, physicians eligible from Jan 1, 2026) | Yes |
| Ohio | No, with certificate | Telemedicine Certificate (Ohio Rev. Code 4731.296) | Yes |
Two patterns are worth noting. First, the strictest states, California and New York, are also the ones outside the IMLC, so building coverage there takes the most lead time. Second, telehealth registrations come with real conditions: unencumbered home-state licenses, clean five-year disciplinary histories, and in Florida's case a registered agent and liability coverage. They are legitimate pathways, not shortcuts.
Consultation exemptions exist in several states, including California and New York, allowing an out-of-state physician to consult with an in-state licensee. These generally do not cover rendering final reads, and AstraRad does not rely on them. Final signed reports require full practice authority in the patient's state.
How AstraRad handles licensing and credentialing
Licensing is our operational problem, not yours. Here is what that means in practice:
- Licensed where your patients are. Every study is routed only to radiologists licensed in the state where your patients are located. Our 240 subspecialists hold multi-state licensure maintained by a dedicated licensing team, with the IMLC as the primary pathway in compact states and traditional applications in the rest.
- Credentialing packets, complete and current. For each radiologist reading for your facility we provide licenses, DEA registration where applicable, board certifications, fellowship documentation, malpractice coverage and history, and references, formatted for your medical staff office or credentialing committee.
- Delegated credentialing supported. For hospitals and larger groups that operate under delegated credentialing agreements, we work within your delegation framework, which typically cuts radiologist onboarding from months to weeks.
- Renewals and monitoring. License renewals, CME tracking, and ongoing sanction monitoring run continuously. If a radiologist's status changes in any state, routing rules update the same day.
- Coverage that scales. Because licensure is handled centrally, adding volume does not add licensing work for you. We maintain headroom for 25,000 additional studies per month across our 24/7/365 network spanning 12 time zones, and an 8,000-study backlog clears in under 30 days.
Licensing sits inside the same compliance program that covers the rest of the platform: HIPAA and GDPR compliant, DICOM conformant, with HL7 and FHIR report delivery. Pricing is per report with no minimums, no subscriptions, and no platform fees; request a rate card through our contact page and you will have it within one business day. Full pricing structure is on the pricing page.
State-by-state licensing guides
For the exact statutes, board rules, and pathways in the states we are asked about most, see the dedicated guides:
- Teleradiology licensing in Texas: full license required, expedited via IMLC
- Teleradiology licensing in Florida: full license or 456.47 telehealth registration
- Teleradiology licensing in California: full license only, no IMLC pathway
- Teleradiology licensing in New York: full license only, no IMLC pathway
- Teleradiology licensing in Colorado: full license or SB 24-141 registration
- Teleradiology licensing in Ohio: full license or telemedicine certificate
Each guide cites the state medical board and primary statutes directly and carries its own verification date.
Last verified July 2026. This page summarizes state licensing rules for general information and is not legal advice. Requirements change; confirm current rules with the relevant state medical board, the IMLC Commission, or your counsel before relying on them.