Most people in healthcare know what a CRO is. Fewer have heard the term integrated research organization, or IRO. The idea is simple: instead of sending patients out to a standalone research center, an IRO builds a clinical research site inside an independent specialty practice and runs it day to day.

This guide explains what an integrated research organization does, how it differs from the other players in clinical trials, and why the model is growing among independent practices.

The short definition

An integrated research organization partners with a physician practice to add clinical research as a new service line. The IRO supplies the research staff, systems, regulatory work, contracts, and patient recruitment. The practice supplies the investigators, the patients, and the clinical setting. Studies run where patients already get care.

How an IRO differs from a CRO, SMO, and research center

Clinical research has a lot of acronyms. Here is where each one sits:

• Sponsor: the drug, device, or biologic company that funds and owns the study.

• CRO (contract research organization): hired by the sponsor to manage the trial across many sites. CROs work for the sponsor, not the site.

• Standalone research center: a dedicated research clinic that recruits patients from the public, often through advertising. Patients visit the center only for the study.

• SMO (site management organization): provides staffing or management services to research sites. Models vary widely, and many focus on staffing alone.

• IRO (integrated research organization): builds the full research operation into an existing specialty practice, including recruitment, and keeps the patient relationship with the practice.

The key difference is where the research lives. With an IRO, the site is the practice. The physician who treats the patient is the investigator, and the study happens in a clinic the patient already knows.

What the IRO handles

Running a compliant research site takes far more than a willing physician. An integrated research organization typically takes on:

• Study sourcing: finding trials that match the practice's specialty and patient population, and completing sponsor feasibility questionnaires.

• Staffing: hiring, training, and managing clinical research coordinators, and covering vacations and turnover.

• Regulatory: IRB submissions, the regulatory binder, investigator documents such as the Form FDA 1572, and ongoing compliance with Good Clinical Practice.

• Contracts and budgets: negotiating the clinical trial agreement and study budget with the sponsor or CRO.

• Patient recruitment: pre-screening the practice's own patients, plus IRB-approved outreach to the community.

• Billing and payments: tracking visits, invoicing sponsors, and reconciling study payments.

What the practice provides

The practice contributes what no outside company can: physicians with real specialty expertise, and patients who already trust them. Federal rules require the principal investigator to personally oversee the study, so physician time is real, but it is focused on medical judgment rather than paperwork. You can read more in our guide to how physicians become principal investigators.

Why the model is growing

Sponsors have a site problem. According to the Tufts Center for the Study of Drug Development, about 11% of research sites fail to enroll a single patient and another 37% under-enroll. Meanwhile, ClinicalTrials.gov lists more than 20,000 interventional trials recruiting or preparing to recruit at U.S. sites, and more than 4,600 of those are industry-sponsored.

Many of the patients those trials need are already being treated in independent specialty practices, for conditions like chronic back pain, diabetes, osteoarthritis, and migraine. What those practices usually lack is the staff and infrastructure to run a trial. An IRO fills that gap.

Who benefits

• Practices add a new revenue stream and give patients access to new treatments, without hiring research staff themselves.

• Sponsors get specialist sites with real patient panels, which improves the odds of hitting enrollment targets.

• Patients can join a study close to home, overseen by a physician they already know.

The bottom line

An integrated research organization turns an independent specialty practice into a working clinical research site. The practice keeps its patients and its focus on care. The IRO handles the research operation.

Whizz Health is an integrated research organization for independent specialty practices. If you want to know whether your practice is a fit, tell us about your practice or browse the specialties we work with.