EpiCenter Staff

Alaska Native Epidemiology Center

What We Do

Data Sharing

We respond to data requests, analyze and report on health data, and share Alaska Native health information at the local, state, national, and international levels.

Technical Assistance

We provide public health training, program evaluation consultation, and assist in the development of surveys, focus group guides, and other data collection methods.


Surveillance is conducted on a number of health issues such as different cancers, maternal child health, and mortality. We also conduct applied health studies.

Disease Prevention

We support the development of initiatives addressing health priorities, health promotion, and disease prevention.

I.H.S. Involvement

Part of ANTHC's Division of Community Health Services and one of twelve tribal epidemiology centers established by the Indian Health Service, we assist the National IHS Epidemiology Program in improving the health of Alaska Natives and American Indians.

Tribal Epidemiology Centers

The Alaska Native Epidemiology Center is one of 12 nationally recognized Tribal Epidemiology Centers (TECs). More info about the TECs.

Our Staff

Ellen Provost

Dr. Ellen Provost

EpiCenter Director

Dr. Provost has served the Alaska Tribal Health System for the past 20 years, and has been Director since 2005. She initially arrived in Bethel, Alaska in 1990 to work with YKHC as a Commissioned Officer in the US Public Health Service. She is a physician specializing in Preventive Medicine and Public Health.

Sarah Nash

Dr. Sarah Nash

Cancer Surveillance Director

Sarah joined the EpiCenter in August 2015 as Director of the Alaska Native Tumor Registry. She also serves as the Principal Investigator for the Alaska Surveillance, Epidemiology and End Results (SEER) Program of the National Cancer Institute. Sarah holds a PhD in Biological Sciences, and an MPH focused on epidemiologic methods and nutrition.

Carla Britton

Dr. Carla Britton

Lead Epidemiologist

Originally from California and a former park ranger, Carla holds an MS in Environmental Health and a PhD in epidemiology from the University of Iowa. She comes to the EpiCenter after completing a two year CDC Epidemic Intelligence Service fellowship with the Idaho Department of Health and Welfare.

Diana Redwood

Dr. Diana Redwood

Senior Epidemiologist

Joining ANTHC in 2004, Diana currently manages the CDC Building Public Health and Capacity grant as well as conducts research studies on colorectal cancer screening methods and prevention. She has worked on tobacco policy through the CDC Wellness Strategies for Health Program and managed the CDC-funded Colorectal Cancer Control Program (2009-2015). Diana holds a PhD in public health, an MPH, and an MS in Nutrition.

Erin Peterson

Erin Peterson

Senior Epidemiologist, WSH

Erin joined the EpiCenter in March 2015. Erin specializes in chronic disease prevention, and manages the CDC Good Health and Wellness Program. Erin holds an MPH from Emory University.

Romy Mohelsky

Romy Mohelsky


Romy joined the EpiCenter in 2011 and focuses on data monitoring and dissemination activities. She also manages the AI/AN Health Disparities Program and serves as staff on the Healthy Alaskans 2020 initiative. Romy holds an MPH from the University of Waterloo.

Bourke Betz

Bourke Betz

Epidemiologist, MSPI/DVPI

Bourke joined the EpiCenter in August 2016 and offers expertise in epidemiology and evaluation. He grew up in Wainwright and Kwigillingok. Bourke began his career working on HIV prevention epidemiology in East Africa, then returned to Alaska to work with Indian Health Service grantees on domestic violence, substance abuse, and suicide prevention. He holds an MS in Epidemiology from the University of Washington.

Ian Blake

Ian Blake

Health Statistician

Ian joined the EpiCenter in June 2014, providing statistical and database support to a variety of EpiCenter projects. His background includen healthcare, fisheries, education, and environmental research. He holds an MS in Statistics.

Christine Tait

Christine Tait

Senior Marketing Media Specialist

Christine joined the EpiCenter in January 2015, bringing more than 20 years of graphic design experience. She provides website, graphic design, photography, illustration, and social media support. Christine holds a BS in Visual Communication/Graphic Design.

Amie Haakenson

Matthew Bailey

Marketing Media Web Specialist

Matthew joined the EpiCenter in December 2015. He provides website and graphic design support for the national Tribal Epidemiiology Centers and ANTHC's Community Health Services. He holds a BFA in Visual Communication with a Graphic Design emphasis.

Teresa Schade

Teresa Schade

Tumor Registrar II

Teresa joined the Alaska Native Tumor Registry in 2009. In her role as SEER program manager she collects cancer information on Alaska Native people throughout the state for statistics and research, and oversees the cancer registry data management system. She received her Certified Tumor Registrar certificate in 2013.

Sarah Shafer

Garrett Zimpelman

Programmer/Analyst, ANTR

Garrett joined the EpiCenter in January 2016 as a Computer Programmer/Analyst for the Alaska Native Tumor Registry (ANTR). Garrett’s duties include data management, database design and implementation, computer programming, and data analysis. Prior to joining the ANTR, Garrett worked for the Alaska Department of Fish and Game.

Iona Sallison

Iona Sallison

Program Assistant, ANTR

Iona Sallison joined the Alaska Native Tumor Registry as the Program Assistant in August 2014. She has a background in Education and more recently Health Information Management. Iona brings ten years medical and behavioral health experience to the department.

Kristen Mitchell

Dr. Kristen Mitchell

Program Evaluator, WSH

Originally from Atlanta, GA, Kristen joined the EpiCenter in June 2015. With a background in maternal and child health and youth suicide prevention, Kristen is the Program Evaluator for the CDC Wellness Strategies for Health. Kristen holds a Doctorate in Public Health with a concentration in Community-Based and Translational Research.

Amie Haakenson

Amie Haakenson

Special Projects Coordinator

Amie joined the EpiCenter in 2010. She is known across Alaska as Polypman and travels with Nolan the Colon encouraging screening for colorectal cancer among Alaska Native people. Amie also works on tobacco policy through the CDC Wellness Strategies for Health Program and other annual projects in the EpiCenter.

Annie Okpealuk

Rochelle Greenley

Program Assistant

Rochelle joined the EpiCenter as a Program Navigator in 2013, but has been with ANTHC since 2004 in various roles. Half Yup’ik Eskimo and half Irish, Rochelle grew up in the village of Togiak. She is currently pursuing a bachelor’s degree in Environmental Studies.

Patti Ruuti

Patricia Ruuti

Program Administrator

Patricia joined the EpiCenter in January 2009. As a member of the Oneida Nation of Wisconsin, she served her tribe for 23 years. Her background includes work in Accounting, Veterans Services, Enrollment Dept, and Environmental Health. She provides administrative support to the EpiCenter in her role as Program Administrator.

Annie Okpealuk

Annie Okpealuk

Office Specialist

Half Inupiaq and half Athabaskan from the Maniilaq region, Annie joined the EpiCenter in 2014. Her background includes work at the ANTHC Business Office, and the Southcentral Foundation Behavioral Health Dept. She is pursuing a degree in Business Administration Management, with a minor in Alaska Native Business Management.