Time to Renew!

Help us meet our challenge goal. Renew your SIDM membership by June 30, 2019 and our Board of Directors will match dollar for dollar any amount contributed up to $25,000.

Eliminating Harm from
Diagnostic Error

The Society to Improve Diagnosis in Medicine (SIDM) is working to create a world where no patients are harmed by diagnostic error.

Missing Pathology Report

After having a mass removed from his cervical spine, Patrick Sheridan was told he wouldn't need any further treatment. However, the final pathology would never make it to Patrick's neurosurgeon.

Transforming Medical Education

Taking the first steps toward developing a new curriculum to educate health professionals about how to improve diagnosis.

Diagnostic Roller Coaster

Jennifer Campisano was diagnosed with stage 4 breast cancer at 32 years old. After nearly four years of chemotherapy, Jennifer came face-to-face with a critical diagnostic error that occurred early in her journey.

Capitol Hill

Catalyzing Policy Action

Despite the enormous toll of diagnostic error on lives and resources, funding for research to tackle this problem remains minimal, totaling just a few million dollars each year.

Testing Oversight

After finding a small lump on her breast, Sandra Kaus completed a mammogram and was told if she did not hear back, all was well. One year later, Sandra faced a devastating delayed diagnosis caused by an initial testing oversight.

Diagnostic Error: A Patient Safety Imperative

Sue Sheridan, SIDM's Director of Patient Engagement, discusses her family’s experience with diagnostic error in the new documentary, To Err is Human.

Learn more as the documentary highlights the latest efforts in patient safety and explore what SIDM is doing to create a world where no patients are harmed by diagnostic error.


Patients and family members have a significant opportunity to contribute to diagnostic accuracy and timeliness by actively participating in the diagnostic process. But often, they don't know the questions to ask, the information to offer, or the steps to take to improve diagnosis.

Clinical Teams

Every member of the clinical team has a role to play in ensuring that diagnoses are accurate, timely and communicated to the patient. SIDM offers resources for clinical team members to improve cognitive skills and work within their health systems to improve the diagnostic process.

Medical Educators

Improving diagnosis requires continued investment in medical education, leveraging trainees, practitioners, and educators to address gaps in the system and focus on the teams that contribute to accurate and timely diagnostics. SIDM's resources for medical educators examine clinical reasoning and system factors that underlie diagnostic error, and offer tools and strategies to to bring diagnostic quality and safety into the medical education curriculum.


Whether you're an established researcher or just joining the diagnostic error research community, SIDM offers a variety of resources to help advance research efforts in the field. Explore existing literature, engage with your peers, and join the conversation as we work to foster the growth of the research community.


Despite the fact that diagnostic error likely accounts for more patient harm than all other medical errors combined, federal investment in research to improve diagnosis amounts to about $7 million per year, or just .02% of the total $35 billion federal health research budget. Learn how you can support efforts to expand funding for research.

In the News

Doctors Meeting

New Class of SIDM Fellows in Diagnostic Excellence Announced

SIDM has announced seven new Fellows in Diagnostic Excellence working on research projects surrounding the issue of diagnostic quality and safety.

ACT for Better Diagnosis logo

Building a Culture of Diagnostic Quality

Learn what Intermountain Healthcare, member of the Coalition to Improve Diagnosis, is doing to engage providers and patients in diagnostic safety.

Doctor showing x-ray image to patient

Asking Patients to Close the Loop on Diagnostic Imaging Test Results

Read the latest update on Pennsylvania’s Patient Test Result Information Act in the ImproveDx Newsletter.

Join Us

SIDM is the only organization focused exclusively on reducing diagnostic error in medicine. And when you join SIDM, you help lead the way to better health care for everyone.

Support Our Mission

Only through your support can SIDM create a world where no patients are harmed by diagnostic error.