ACT for Better Diagnosis:  EVERY 9 MINUTES…someone in a U.S. hospital dies due to a medical diagnosis that was inaccurate or delayed. ACT for Better Diagnosis is an initiative of the Society to Improve Diagnosis in Medicine (SIDM) and supported by the Gordon & Betty Moore Foundation and The Mont Fund.The goal is to improve the diagnostic process by identifying and spreading practical steps that everyone throughout the healthcare system can take—from patients and physicians to laboratory scientists and health system leaders. By working together, the Accuracy, Communication, and Timeliness of diagnosis can be improved.

What ACTion are you taking?

In 2017, clinical laboratories in the U.S. conducted 13.8 billion tests. Clinical laboratory tests play a critical role in diagnosing, monitoring, and treating a broad range of conditions including cancer, diabetes, heart disease, and infectious diseases.  If you are a patient, use Lab Tests Online to gain a better understanding of your tests and results; and help you guide a discussion with your healthcare provider. If you are a healthcare professional, this site can serve as a quick resource for keeping up with advances in laboratory medicine.

Learn about more resources through the Act for a Better Diagnosis initiative and visit the SIDM resources page for information that will assist members of the clinical team, medical educators, researchers, and patients.

Latest News

One in 10 Patients with a 'Big Three' Disease Misdiagnosed

Study: Patients with major vascular events, infections, or cancers most likely to receive inaccurate or delayed diagnoses resulting in serious harm.

(May 14, 2020) One in 10 people (9.6%) with symptoms caused by a major vascular event, infection, or cancer will be misdiagnosed, according to a study from researchers at the Johns Hopkins University School of Medicine and CRICO Strategies.

Published today in the academic peer-reviewed journal Diagnosis, the study provides estimates of diagnostic error and serious misdiagnosis-related harm rates for each of the five most frequently misdiagnosed major vascular events, infections, and cancers, together referred to by authors as the "Big Three." Learn more

Fact Sheet


About The Society to Improve Diagnosis in Medicine

The Society to Improve Diagnosis in Medicine (SIDM) catalyzes and leads change to improve diagnosis and eliminate harm from diagnostic error.  The organization works in partnership with patients, their families, the healthcare community, and every interested stakeholder. SIDM is the only organization focused solely on the problem of diagnostic error and improving the accuracy and timeliness of diagnosis. In 2015, SIDM established the Coalition to Improve Diagnosis.

The Coalition to Improve Diagnosis, formed and led by the Society to Improve Diagnosis in Medicine, increases awareness and actions that improve diagnosis. Members of the Coalition represent hundreds of thousands of healthcare providers and patients—and the leading health organizations and government agencies involved in patient care. Together, all work to find solutions that enhance diagnostic safety and quality, reduce harm, and ultimately, ensure better health outcomes for patients. AACC is a proud member of the Coalition View the list of Coalition members.

This article waslast modified on May 19, 2020.