How Do Imaging Centers Outsource Radiology Reading?

Section 1 What does it mean for an imaging center to outsource radiology reading?

It means an outside radiology group interprets some or all of the studies your center performs. Your technologists still run every scan. The images travel electronically from your PACS, or through a web portal, to radiologists at another location, who read them and return signed reports to your system.

That remote practice is called teleradiology, and it has its own national practice standard. The ACR-AAPM-SIIM Technical Standard for Electronic Practice of Medical Imaging, most recently revised in 2022, sets out how remote interpretation should run, from image handling and access to prior exams to quality control [1]. Outsourcing can be narrow or broad, and the right shape depends on what your own radiologists already cover.

Section 2 What outsourcing models can an imaging center choose?

Outsourced reading comes in a few basic shapes, and a center can combine them:

• Full coverage: the outside group provides the final interpretation for every study you perform. This fits a center with no radiologists on staff.
• After-hours and overflow coverage: your radiologists read their usual schedule, and the outside group takes nights, weekends, holidays and the studies that exceed your team's capacity on a heavy day.
• Subspecialty reads: studies that call for a specific subspecialty, such as a neuroradiology or musculoskeletal MRI, go to radiologists who focus on that area, while your team keeps the rest.
• Preliminary or final interpretation: a preliminary read is an initial interpretation that a radiologist later confirms or revises in a final report, and the final report is the official interpretation. Know which one you are buying.

Section 3 What stays with the imaging center, and what moves to the reading group?

The split follows a line Medicare already draws. For many imaging services, Medicare separates the professional component, the physician's work interpreting the study, from the technical component, which covers all non-physician work, including administrative, personnel, equipment and facility costs [2]. Outsourcing moves the professional work. The technical work stays with you.

• Stays with your center: scheduling, patient intake, technologists, scanners and image quality.
• Moves to the reading group: interpreting each study, comparing it with prior exams, writing and signing the report, and communicating findings that cannot wait for the routine report.
• Set by agreement: protocols, study routing, and the procedures for critical results and quality review, written down by both sides before go-live.

Not every service divides this way. Medicare contractor guidance notes that the split does not apply to physician services that cannot be distinctly split into the two components [2]. Your agreement with the reading group should spell out who bills for the interpretation. If your center buys the interpretation and bills Medicare for it, Medicare's anti-markup rule can limit what you may bill for that purchased component [9], so confirm the billing arrangement with your billing counsel before go-live.

Section 4 What has to be in place before the first read?

Confirm each of these in writing before the first study moves:

• Licensure where the patient is imaged: the standard's 2012 revision asked physicians who provide the official interpretation to know the licensure requirements at both the site sending the images and the site receiving them, and to be licensed as appropriate [3]. The practical test for your center is whether every radiologist reading your studies is licensed in the state where your patient was scanned.
• Credentialing: confirm who credentials each reading radiologist, and what your payers and any hospital partners require before those radiologists read for you.
• The image and report connection: studies leave your PACS by DICOM push or through a web portal, orders reach the group, and finished reports return to your RIS, through an HL7 interface or the portal. Put a business associate agreement in place where one is required, then test the whole loop before go-live.
• Worklists and priors: decide how studies route, by modality, subspecialty and priority, and make prior exams available to the reader. The ACR-AAPM-SIIM standard lists retrieval of available prior studies for comparison among its goals [3].
• Protocols: agree on imaging protocols by study type, so the reading radiologist gets the sequences and views the clinical question needs.
• Critical results: agree how the reading radiologist reaches your team or the referring provider when a finding cannot wait, and how each communication is documented. The ACR practice parameter on communicating imaging findings describes situations that call for communication outside the routine report, covering critical, discrepant and significant unexpected findings, and recommends recording when and how a finding was communicated and to whom [4].
• Report format: agree on the report your referring providers will receive, and review samples before you sign.
• Quality assurance: ask whether the group takes part in formal peer review, such as the American College of Radiology's RADPEER program [5], what it measures and what it will report to you. The ACR-AAPM-SIIM standard also expects documented policies for monitoring and evaluating the image data management system [3].

Section 5 How does outsourcing work alongside the radiologists you already have?

It fills the gaps around them rather than standing in for them: the hours they are off, the subspecialty depth they do not carry, and the volume peaks that outrun them. Your radiologists keep the studies they already read.

Subspecialty depth is hard to hold in-house. An ACR Bulletin workforce update from the Harvey L. Neiman Health Policy Institute reports that radiologist attrition rates in the U.S. more than doubled from 2014 to 2022, from 1.1% to 2.5% a year, and that subspecialists were 37% more likely than generalists to leave the workforce [6]. The same update projects a workforce 20.9% larger in 2055 than today if attrition stays at post-COVID levels and residency positions do not change [6]. The gaps a center feels are specific, and an outside group can cover them without asking your radiologists to read outside their focus.

Expert Radiology fills the subspecialty gap for imaging centers:

• Subspecialty coverage across MSK, neuroradiology, spine and body imaging, from 100% board-certified, subspecialty-focused radiologists.
• Licensed and reading in all 50 states, with 350+ facilities served and 400K+ MRIs interpreted.
• Studies by DICOM push from your PACS or through the ExRad Portal. Finished reports are returned to your RIS or delivered through the portal, whichever fits your workflow; our onboarding team scopes the connection with you.
• Questions about a read are answered by the radiologist who read it: ask through the portal or your account contact, and the reading radiologist calls you back. Urgent findings are phoned to the ordering provider or your center and documented in the report.
• Multi-layer QA with subspecialty oversight, and a business associate agreement signed at onboarding where one is required.
• All MRI reads delivered as PrecisionPlus v3™ reports.

Section 6 What should you ask a reading group before you sign?

Ask for written answers, and compare groups on the same terms:

• Is every radiologist who will read our studies licensed in each state where our patients are imaged?
• Which subspecialties read which study types, and how are studies routed to them?
• How do studies, priors and orders reach you, and how do reports come back to our RIS?
• What is your critical results process, and how is each communication documented?
• Do you take part in formal peer review, what do you measure, and what will you report to us?
• How is the interpretation billed, and who bills for it?
• What turnaround can you support for our study mix, by modality and priority?

Turnaround depends on what you send, so model your own mix with the turnaround time calculator before you compare answers. The full checklist, including red flags and transition planning, is in our guide to choosing a teleradiology partner.

Start with what your radiologists read today and where the subspecialty gaps are. Then talk to us about teleradiology coverage, and bring your study mix.