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About us

About the RADIUS™ Program

A comprehensive care network for people living with IBD and their health care teams

RADIUS™ is a collective of providers focused on providing excellent care to patients with IBD. Taking a proactive, evidence-based approach, we work together as a multidisciplinary team to optimize and enhance care and to help prevent complications in a patient’s IBD care and treatment.

Transformative impact of our hard work

First established at Dartmouth Hitchcock Medical Center in New Hampshire, RADIUS™ was developed by Corey Siegel, MD and the NH RADIUS™ team. RADIUS™ aims to provide patients with IBD who are living in rural regions with a more proactive and comprehensive team approach to their care, in collaboration with their primary community IBD providers.

Meet our team

Our team from the RADIUS™ Hub at Dartmouth Hitchcock Medical Center in Lebanon, NH

Corey Siegel, MD, MS

IBD Specialist Physician

Nicola Felicetti, MSN, RN
Nicola Felicetti, MSN, RN

IBD Nurse Coordinator

Jessica Salwen-Deremer, PhD
Jessica Salwen-Deremer, PhD

IBD Psychologist, Mental Health Care Provider

Catherine Giguere-Rich
Catherine Giguere-Rich, RD

IBD Nutritionist

Gina Manzi, RpH
Gina Manzi, PharmD

IBD Pharmacist

Our team from the RADIUS™ Hub at the University of North Carolina at Chapel Hill in Chapel Hill, NC

Millie Long MD, MPH

Gastroenterologist

Gabi Ritaccio MD

Gastroenterologist

Anna Salvador, Ph.D, RD, LDN

Clinical Dietician

Payal Kakadiya, CCP

Pharmacist

Patrick Smith, PhD

Psychologist

Susan Jackson

Program Manager

Our team from the RADIUS™ Hub at the University of Colorado Digestive Health Center in Aurora, CO

Benjamin Click, MD

IBD Specialist Physician

Stacey Collins, RD

IBD Nutritionist

Amitha Gumidyala, PhD

GI Psychologist

Jennifer Aoto, PharmD

IBD Pharmacist

Hailey Sottile, RN BSN

RADIUS Nurse Coordinator

Our team from the RADIUS™ Hub at The Oregon Clinic in Portland, OR

Don Lum, MD

IBD Specialist Physician

Jen Williams, CMA

RADIUS Coordinator

Marissa Nagle, RN

RADIUS Coordinator

Our team from the RADIUS™ Hub at the Vanderbilt Inflammatory Bowel Disease Clinic in Nashville, TN

Sara N. Horst, MD, MPH

IBD Specialist Physician

RADIUS™ is growing

Currently, RADIUS™ has established 5 hubs providing IBD care coordination and education resources, with more sites onboarding in the future.

5

Hub sites

These RADIUS™ Hub sites are now accepting referrals from established Spoke sites, for patients to be seen with the following gastroenterologists and their teams:

  • Dr. Corey Siegel, Dartmouth Hitchcock Medical Center, Lebanon, NH
  • Dr. Sara Horst, Vanderbilt Health, Nashville, TN
  • Dr. Benjamin Click, University of Colorado, Aurora, CO
  • Dr. Donald Lum, The Oregon Clinic, Portland, OR
  • Dr. Millie Long, University of North Carolina at Chapel Hill, NC
13

Supported states

Currently, 13 states benefit from access to our program because of proximity to a Hub or Spoke care provider.

Learn more about your team

IBD Specialist Physician

Offering specialty care and extensive expert experience in IBD.

IBD Nurse Coordinator

Ensuring comprehensive care-coordination prior, during and following the patient’s visit.

IBD Psychologist

Providing assessment of and recommendations for the ways in which thought and behavior patterns can influence disease management and/or quality of life.

IBD Nutritionist

An individualized approach towards healthy ways to incorporate diet and nutrition into the lives of patients with IBD.

IBD Pharmacist

Providing education, resources and access to patient-specific specialty medication.