Meet the Future of Emergency Medicine

Call9's clinical team is a rapidly growing collection of Physicians with Emergency Medicine, Palliative Care and/or Internal Medicine certification. Below are the providers who are leading this transformation of the doctor-patient experience.


Timothy C. Peck, MD  Cofounder & CEO

Timothy Peck, MD, is the co-Founder and CEO of Call9. He previously held a faculty position at Harvard Medical School and was the Chief Resident in the Emergency Department at Beth Israel Deaconess/Harvard.

While at Beth Israel Deaconess, Peck repeatedly encountered the challenge of treating patients who would have had superior outcomes had he and his team been able to treat them earlier. After investigating this problem, Peck learned that 1) Skilled Nursing Facility patients make up nearly 20% of ambulance transfers to the ED, and 2) the average time it takes for a SNF patient to see an Emergency Physician is over 60 minutes. Shortly after learning the scope of the problem, Peck conceived of Call9, applied to the startup incubator Y Combinator and set out to solve it.

Prior to his time in Boston—where Peck also studied entrepreneurship, learning and technology at Harvard’s Graduate School of Education—Peck earned his MD from NYU.


Katie Davis, ACNP  SVP, Clinical Operations

Katie Davis, ACNP, is the SVP of Clinical Operations at Call9. Davis realized her passion for emergency medicine from a young age; at 15, she was working on an ambulance, and was later certified as an emergency technician before college. Davis has spent her career relentlessly pursuing opportunities to improve patient care and building teams that can affect change for both individuals and the entire system.

Prior to completing her ACNP from Mass General, Davis earned her BSN and MS in Forensic Nursing from Boston College. As an undergraduate student at BC, Davis revived the nearly defunct Eagle EMS, a student-run service, and built it up to nearly 150 volunteers.

Being able to treat patients at the bedside and watch them get better is one of the most rewarding things I’ve ever done
— Jill Griffin, MD

Claritza Rios, MD  Director, Palliative Care Program

Claritza Rios, MD, is the Director of the Palliative Care Program at Call9. A dedicated physician with extensive experience in emergency and internal medicine, Rios found her calling specializing in Palliative Care. Rios recognizes a profound need for palliative care services in high risk populations, such as residents of skilled nursing facilities. She focuses on the whole person and creating a treatment plan based on patient wishes and patient and family values.

Rios studied and trained in Emergency Medicine and Internal Medicine in New York City prior to moving her practice to the San Francisco Bay Area.


Jonathan Fisher, MD, MPH, FACEP, FAEMS —
Head of Quality Improvement and Innovating Safely

Jonathan Fisher, MD, MPH, is the Head of Quality Improvement and Innovating Safely at Call9. Fisher has dedicated his career to emergency medicine medical education and research development. He is staunch advocate for systems based practice, quality improvement and patient safety. Fisher has authored over 40 peer-reviewed articles, 11 textbook chapters and edited 2 textbooks. His clinical and research interests focus on emergency medicine medical education and on the intersections of public health and emergency care.

Fisher spent many years working at Harvard before moving to be a Professor of Emergency Medicine at University of Arizona College of Medicine-Phoenix.

I feel like my patients with Call9 give more to me than I give to them;
now I enjoy practicing medicine again
— Sandra Sicular, MD

Join the Future of Emergency Medicine