The program's faculty is made up of a core group of board-certified family physicians who practice full spectrum family medicine, including inpatient medicine, outpatient medicine, pediatrics and obstetrics. We also have several faculty members that are not family medicine physicians, including pharmacists, behavioral specialists, and an acupuncturist.
The program faculty includes adjunct clinical faculty, as well. These physicians may be embedded in the family medicine clinic, clinic preceptors, inpatient service attendings, or specialty faculty instructors for the resident physicians in both clinic and inpatient settings. There are many of these faculty members in the program and as such not all can be listed here.
Sharry Veres, MD, MHSM
Dr. Veres is a board-certified, full-spectrum Family Physician, who joined the St. Anthony North Residency program in August 2012. She is originally a Western Washington Native, and received her medical degree from the University of Washington School of Medicine. After medical school, she headed for sunnier skies, and completed her residency in Family Medicine at St. Joseph's Hospital, in Phoenix, Arizona. Dr. Veres has also completed a Masters in Health Sector Management from the W.P. Carey Business School at Arizona State University. Dr. Veres has teaching, administrative and curriculum design experience as a residency teaching faculty and faculty member of a medical college. She has received competitive research funding for practice-based research and clinical decision-making in cancer screening. Her clinical areas of interest include healthcare for culturally diverse and underserved populations, behavioral health integration in ambulatory care, and both performing and teaching outpatient procedures. Dr. Veres is happy to be in Colorado, close to the mountains and all the fantastic biking/running trails. She enjoys spending time with her husband and three small children.
Ryan Flint, DO
Associate Program Director of the 144th Ave Site, Core Faculty
Dr. Flint is originally from the mountain town of Big Bear Lake in southern California. He completed his undergraduate and medical school education in the Los Angeles area at Azusa Pacific University and Western University's College of Osteopathic Medicine of the Pacific. He moved out to Colorado for residency, training at Rose Family Medicine Residency in Denver. After five years in private practice he joined St. Anthony's to fulfill his passion for teaching. Ryan has an outpatient focus and his medical interests include chronic disease management, medication assisted treatment, and musculoskeletal procedures, including osteopathic manipulative therapy. He remains passionate about improving health care disparities and inequities especially in marginalized populations. Has made several overseas medical mission trips to Ethiopia and is active in the residency program’s Diversity, Equity and Inclusion Committee. Ryan enjoys hiking and camping, skiing, relaxing with his wife and four children, and eating out at the many, many great restaurants in Denver.
Beth Groff, MD
Associate Program Director of the 84th Ave Site, Core Faculty
Dr. Groff grew up in Pennsylvania and attended Williams College in Massachusetts for college, majoring in English and Women's Studies. After a year of travel, she headed to Philadelphia for medical school at the University of Pennsylvania. She completed her residency in beautiful Asheville, North Carolina. Wanting to speak Spanish and deliver babies, she moved to Colorado to work with Salud Family Health Center, an FQHC in Brighton. At Salud she practiced full-spectrum family medicine for ten years focusing on the care of underserved patients. She is thrilled to have joined the residency in 2011, where she is the Associate Program Director at the 84th Ave Health Neighborhood site. She also helps coordinate Global Health activities for the residency, including work with Helping Babies Survive and Helping Mothers Survive in Peru. She values caring for a diverse patient panel, with a commitment to health equity. Outside of work, she loves to garden, cook and practice yoga. Her husband and two sons keep her updated on the Colorado Rapids soccer team among other things.
Corinn Gayer, DO
Maternal-Child Health Faculty
Born and raised in Las Vegas, Nevada, Corinn Gayer, DO received her Bachelor of Science degree in Biochemistry from the University of Nevada, Reno. Dr. Gayer then completed her medical school training and received a Doctorate of Osteopathy at Kansas City University. To complete her clinical years she received training in a full spectrum Family Medicine residency environment in Wichita, Kansas. Her passion for pursuing a practice in Family Medicine, Women's Health and Obstetrics led her to receive her advanced medical training at St. Anthony North Family Medicine Residency in Denver, Colorado.
Throughout her medical school and residency experience, Dr. Gayer also led and designed multiple international underserved primary care missions in countries ranging from Peru to Guatemala and also the Dominican Republic. She has also currently been appointed as the lead physician cultivating Centura Health's International Medicine partnership and missions with Uganda.
After completing her residency, Dr. Gayer was appointed by St. Anthony North Hospital as the Fellow in Surgical Obstetrics and Women's Health. The completion of her fellowship training now gives her a broader scope of abilities to practice family medicine while incorporating women’s health with a focus on high risk obstetrical care.
Dr. Gayer now practices at Centura's Avista Campus, St. Anthony North Campus, Thornton Neighborhood Clinic and the Bob Wilson Memorial Hospital in Ulysses, Kansas. She also serves Clinica and Broomfield Family Practice supporting their obstetric care patient load.
In her free time, Dr. Gayer prioritizes time with friends, family and also her church community. As an extroverted personality, Corinn is a highly relational soul through and through. She resides in the Boulder County area and you can find her making the most of the outdoors through hiking, paddle boarding and skiing as much as she can with her husband Scott.
Trevor Harrington, DO
Director of Maternal Child Health, Core Faculty
Born and raised in Ithaca, New York, Trevor Harrington, DO received her bachelor of science degree in physiology from McGill University in Montreal, Canada. After graduation, she moved to San Francisco working as an EMT and clinical researcher before finally landing in medical school. She completed her doctorate at Touro University College of Osteopathic Medicine in Vallejo, California. Dr. Harrington is receiving advanced medical training at St. Anthony North Family Medicine.
Dr. Harrington provides full-scope primary and acute care services. Her medical interests include adolescent health, addiction treatment, women's health and health care reform.
In her free time, Dr. Harrington is a climber, skier and former ballet dancer.
Kim Insel, MD
Director of Fellowships, Core Faculty
Dr. Insel grew up in Tucson, AZ and attended Brown University in Rhode Island. She received her Master’s in Public Health in Global Health at Boston University School of Public Health during which she focused on training in Managing Complex Humanitarian Emergencies and Disasters and interned briefly for WHO in Turkey. She attended medical school at the University of Arizona during which she worked for a year as a fellow for the Centers for Disease Control and Prevention in the Division of Global Migration and Quarantine focusing on surveillance systems and developing a surveillance tool for Haitians post 2011 Earthquake. She attended residency at the University of Colorado where she completed a fellowship in global health post residency living in Guatemala where she developed a population registry for pregnant women and a community health group visit educational curriculum. She then worked as an Assistant Professor at Oregon Health and Sciences University focusing on training faculty and residents in point of care ultrasound. She came to St. Anthony’s Residency in 2017, starting as the Director of Fellowships with the creation of our Obstetric, Emergency and Population Fellowships. Dr. Insel directs those in addition to the St. Anthony’s Faculty Development Fellowship and Integrative Medicine fellowship. She has a strong passion for treating patients living with substance use disorder and developed a suboxone group visit clinic. She loves her career in teaching and enjoys teaching all residents in hospital medicine, substance use disorder, PrEP, POC OB and Medicine Ultrasound, and global health. In her free time, she enjoys watching her one year old and three-year old out run and outsmart her.
Sarah Liegl, MD
Dr. Liegl grew up in Denver and got her BA in History from Grinnell College in Iowa. She spent a hectic year in Johannesburg, South Africa doing HIV counseling before attending medical school at Loyola University in Chicago. Sarah completed her residency and learned Spanish in Greeley, CO where she was on the community health center ("Sunrise") track. Following residency, Sarah went to an urban community health center in Washington DC where she did her National Health Service Corp Scholar obligation. It was at this site where she fell in love with residents and teaching, and went on to become faculty at the Georgetown Family Medicine Residency where she continued working with an underserved patient population. Sarah was happy to return to Colorado in 2013 and has been at St. Anthony’s ever since.
Her medical interests include all things women's health, pediatrics, international medicine, and caring for underserved patient populations. She enjoys working on the Obstetrical Training Track as well as on the Diversity, Equity, and Inclusion Committee. She is hoping to expand resident involvement in Nepal, where her husband is from.
Outside of work she keeps busy with her two kids, and enjoys running, reading, and travel.
Matt Ludemann, MD
Dr. Ludemann grew up in the 'burbs' of Chicago, brainwashed from the time he could walk into becoming a die-hard Chicago Cubs and Notre Dame fan. He stayed in Chicago for undergraduate and medical school at Northwestern University. He met his wife, Julianna, there and the two wisely left the Midwest for Colorado. Matt completed his Family Medicine residency at St. Anthony in 2009 and his chief residency in 2010. He and Julianna have two children, one dog, two cats, and four chickens. They enjoy spending their spare time hiking, fly-fishing, cross-country skiing the quietest trails they can find in the high country, and travelling as much as possible. Dr. Ludemann’s interests include teaching Evidence-Based Medicine and High Value Cost Conscious Care.
Seth Mathern, MD
Adjunct Clinical Faculty, Family Medicine
Dr. Mathern is originally from Riverton, Wyoming. He attended the University of Wyoming for undergraduate studies where he pursued a degree in Spanish and Physiology with Honors. He was accepted at the Columbia-Basset program at Columbia University College of Physicians & Surgeons in New York City for medical school training where he discovered a newfound interest in quality improvement, longitudinal care, and not being scared of large cities anymore. He attended residency at the University of Colorado for Family Medicine and did an additional fellowship year at St Anthony’s North Family Medicine in Rural Emergency Medicine.
Dr. Mathern’s medical passions and pursuits include suboxone and opioid use disorders, LGBTQ care, Pre-exposure prophylaxis (PrEP), chronic mental health issues, hospital medicine, point of care ultrasound, and evidence-based practice. He is currently involved on the Diversity & Inclusion committee and interested in holistic interview training.
When not at the hospital, Dr. Mathern enjoys skiing, hiking, frisbee golfing, learning new languages, and playing Dungeons & Dragons, although he would never admit to this.
Michael Rudolph, MD
Medical Student Director & Adjunct Clinical Faculty, Family Medicine
Dr. Rudolph was born in Colorado in the Denver metro area. He attended college at Seattle Pacific University and returned to Colorado to attend medical school at the University of Colorado. He completed residency at Swedish Family Medicine Residency in South Denver and the Faculty Development Fellowship at St. Anthony North Family Medicine. He is currently the Student Medical Director, supervising the education of a group of third- and fourth-year students rotating with Centura. He also attends on the inpatient medicine and obstetrical services, having an interest in maintaining a broad practice spectrum. Personal interests include bluegrass music, and Michael performs in a local bluegrass band. He is affectionately known as “Dr. Bass.”
Laura Strickland, MD
Dr. Strickland grew up in Milwaukee, WI and attended Northwestern University for her undergraduate studies. After college, she spent a year doing a volunteer program with Jesuit Volunteer Corps in San Francisco before returning to Wisconsin for medical school at the Medical College of Wisconsin in Milwaukee and residency at the University of Wisconsin-Madison. Following residency, she took a faculty job at Boston University School of Medicine, where she worked at an FQHC and taught BU medical students. She loved Boston, but has found her home in Colorado. She has a special interest in underserved populations and sees patients at the 84th Avenue Clinic. As a member of the Diversity, Equity and Inclusion committee she feels strongly about improving access for all of our patients. She has been faculty at St. Anthony North since 2012 and her favorite thing about this program is the people- their dedication to their work, patients and willingness to always challenge each other and grow.
Krystal Tamura, MD
Director of Inpatient Services, Core Faculty
Dr. Tamura was born and raised in Longmont, Colorado and completed medical school at University of Nebraska Medical Center in Omaha. She was fortunate enough to be able to come back to Colorado for residency at St. Anthony North, and after completing residency in 2014, had the privilege to stay on as the faculty development fellow.
Dr. Tamura is now a full time faculty and inpatient medical director. Her areas of interest include weight loss medicine, OB, and women’s health. She is board certified in both family medicine and obesity medicine. Even with the busy schedule, she always makes time to be with her husband and daughter. She loves to cook, hike, and read. She is very happy to stay at St. Anthony and looks forward to the many great experiences to come.
Mark Wisthoff, DO
Director of Sports Medicine Fellowship
A Colorado native, Dr. Wisthoff completed his undergraduate and graduate work at Colorado State University earning a Master of Science in exercise physiology and nutrition. Before attending medical school, he worked at the Rocky Mountain Cancer Center in Rose Hospital designing nutritional intervention and weight loss studies.
Dr. Wisthoff earned his medical degree at the Midwestern University – Chicago College of Osteopathic Medicine, returning to Colorado to complete his family medicine residency at the Fort Collins Family Medicine Residency program, serving as co-chief resident his final year. He then completed a primary care sports medicine fellowship at the University of Pittsburgh in Pennsylvania.
Dr. Wisthoff believes in caring for the patient as a whole and returning them to the activities they enjoy as soon as possible.
When he’s not treating patients, Dr. Wisthoff enjoys spending his free time with his family hiking, snow shoeing, working out, cooking and exploring new restaurants in Denver.
Christina Zarza, MD
Dr. Zarza received her bachelor’s degree from the University of Colorado at Boulder in both Spanish Literature and Biology. She graduated Summa cum laude and also completed a Neuroscience certificate. Dr. Zarza earned her medical degree from the University of Colorado Health Sciences Center. She completed her residency at St. Anthony North Family Medicine Residency program and served as co-chief resident her final year.
Fluent in Spanish, some of her medical interests include pediatrics, community medicine, and global health. When she is not delving into the complex world of medicine, she enjoys hiking, reading, baking, traveling, and spending time with family and friends.
Kim Walter, PhD
Director of Behavioral Health and Care Integration
Dr. Walter is passionate about integrated care! Her doctoral dissertation was on building a collaborative care model for integrating mental health into primary care (before PCMH was ever created!) She earned her BA in Psychology from Ball State University and her MA and PhD from Purdue University. She also received her graduate teaching certificate while at Purdue. After grad school, Kim followed her husband's career path first to Tennessee and eventually to Colorado. Dr. Walter has experience in both inpatient and outpatient mental health in a variety of medical settings from private medical offices to corporate healthcare systems. Kim joined the behavioral science faculty at St Anthony's in 2011 and worked hard to build our amazing Integrated Care Team from the ground up. Kim enjoys cooking, gardening and travel. She spends much of her free time outdoors with her husband and two dogs camping or boating.
Ivy Donaldson, PhD
Behavioral Health Faculty
Dr. Ivy Donaldson has been a behavioral health faculty member at St. Anthony North Family Medicine Residency program since 2018. As a behavioral health faculty member, Dr. Donaldson is responsible for providing training to residents, students, and medical faculty about behavioral and mental health in the context of a medical setting. As part of the behavioral health faculty team, Dr. Donaldson also develops behavioral health residency curriculum, facilitates resident support groups and individual resident support, and provides behavioral health consultation in the family medicine clinics.
Dr. Donaldson earned her Ph.D. in counseling psychology from the University of Denver. She has a wealth of experience working with underserved populations and individuals with severe and persistent mental illness. She has a passion for working in integrated care settings, for teaching, working with underserved populations, and helping patients to reach their health goals by approaching patient care from a holistic perspective.
Dr. Donaldson is originally from Los Angeles, California and has enjoyed living in Colorado since 2009. She does miss the ocean, however finds the mountains here in Colorado to be a beautiful substitute. She lives in Denver with her 10-year-old son. She enjoys taking full advantage of all the activities that Colorado has to offer such as hiking, camping, backpacking, spending lazy days in a hammock, connecting with friends over a meal in one of the delicious eateries in Denver, a nice red wine, and reading.
David Alvarez, PharmD
David joined the Centura hospital team in 2014 after 23 years of pharmacy experience in Texas, predominantly practicing in hospital pharmacy but also gaining valuable experience in both the retail and mail-order pharmacy settings. During his time as a staff pharmacist and then clinical pharmacist, his specialty areas of practice included neonatal intensive care, surgery, and rehabilitation medicine including traumatic brain injury patients. He has also worked in pediatrics and with surgical patients, and he has extensive experience with adult medicine.
At Centura, he initially applied his extensive hospital experience to the inpatient pharmacy, and he provided a high level of interaction with physicians, residents, and nurses on the hospital floors. David changed gears in 2018 and came on board with the St. Anthony North Family Medicine Residency program. His goal with the residency program was to transform pharmacy services in the outpatient clinic setting by integrating pharmacy services into routine patient care and by providing focused, specialized programs in anticoagulation and diabetes care.
David’s approach is to care for patients while taking all aspects into consideration. This includes educating patients about their medications and empowering them to take control of their conditions, all while maintaining a fun and engaging work environment.
David received his BS in pharmacy from the University of Texas at Austin and his PharmD from Shenandoah University.
When he is not working, David enjoys spending time with his wife trying new wines, playing with his dogs, exercising, playing the guitar and riding his motorcycle. He is a native Texan.
Marina Serdyuk, PharmD
Marina received her Pharm D. from the University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences in 2013. She graduated as a member of the Rho Chi Society, an honor society that recognizes top academic achievement in pharmacy. She received her board certification in ambulatory care pharmacy (BCACP) in 2019 through the Board of Pharmacy Specialties. Her background is in outpatient pharmacy. She joined the integrated care team as an ambulatory care pharmacist back in 2018. She manages the anticoagulation clinicvand continues to expand pharmacy services such as comprehensive medication reviews, diabetes management, and smoking cessation management and counseling. With a passion for patient care, she hopes to continue expanding pharmacy’s role in the family medicine clinic.
When she is not working, she enjoys yoga, reading, music, and spending time with family and friends. She is also a certified yoga instructor and has a passion for mindfulness and meditation.
Liz Lovefury, DAOM
Acupuncture and Integrative Healing Faculty
Dr. Lovefury completed her undergraduate education at Vassar College in Asian Studies and her Masters of Science in Oriental Medicine at Meiji College in Berkeley, CA. Liz returned to her native state of Colorado and practiced for over a decade in the Vail Valley before deciding to go on and complete a Doctorate in Acupuncture and Oriental Medicine at Oregon College of Oriental Medicine and move back to her hometown of Denver. Liz is currently the Immediate Past President of the Acupuncture Association of Colorado and the Vice President of the American Institute of Integrative Herbalism. She is thrilled to be a part of a truly integrative healthcare team at St. Anthony Family Medicine and working with the residents.
Sara Diaz, DO
Director of Integrative Medicine
Dr. Diaz grew up in the Midwest as a Hoosier, graduating from Indiana University for undergrad and moving on to Des Moines University for medical school. She met her husband there and they couples matched at St. Joe’s in Denver for their family medicine residency. After graduating residency, they temporarily relocated back to Indianapolis for her husband to do a sports med fellowship, but missed the mountains and sunshine of Colorado. She since returned with her family to the Congress Park neighborhood, where she and her family enjoy the amazing park system Denver has to offer and close access to the mountains. Sara had an interest in integrative medicine early in her training and supplemented her residency curriculum with acupuncture training. After graduating residency she continued her education in complementary and alternative modalities including nutrition, functional medicine, yoga therapy, safe/evidence based use of supplements, and specifically holistic women’s healthcare. In her free time you will find her hiking, doing yoga, singing with her husband in their family band, loving on her daughter Olivia, and enjoying good food and wine.
Juliana Wilking-Johnson, MD
Adjunct Clinical Faculty, Geriatric Medicine
Juliana Wilking-Johnson, MD, enjoys spending time with and getting to know her patients. By actively listening to their health concerns, she works together to develop a treatment plan that is unique and specific to their goals. Dr. Wilking-Johnson provides care to the entire family, including a specialty in geriatrics. Her medical interests include preventive care, health promotion activities, chronic disease management and common geriatric problems. Dr. Wilking-Johnson performs many in office procedures such as ear wax removal, joint injections and small skin procedures.
At Tufts University in Medford, Massachusetts, Dr. Wilking-Johnson received her Bachelor of Science in psychology and earned her medical degree at Baylor College of Medicine in Houston, Texas. Serving a high volume of diverse and complex patients, Dr. Wilking-Johnson completed her residency program at Memorial Family Medicine in Sugar Land, Texas where she served as chief resident in her final year. She then completed a geriatric medicine fellowship at University of Colorado at Anschutz in Denver, Colorado.
Dr. Wilking-Johnson enjoys baking to satisfy her own sweet tooth as well as those of her friends and family. She also loves exploring the great outdoors with her husband, Kris, and their energetic dog, Xena.
Kimberly Myers, MD
Adjunct Clinical Faculty, Family Medicine
Kim Myers, MD, is a board-certified family medicine physician. When it comes to treating patients, Dr. Myers is committed to providing high quality and compassionate care.
She received her bachelor’s degree from the University of Colorado in Boulder and earned her medical degree at Albany Medical College in New York. She went on to complete an internship and residency program at St. Anthony North Family Medicine in Westminster, Colorado.
Dr. Myers currently works as a family physician and faculty member in which she supervises resident family medicine physicians at St. Anthony North Family Medicine.
Michael Plotnick, MD
Adjunct Clinical Faculty, Obstetrics and Gynecology
Dr. Michael Plotnick, FACOG, received his undergraduate degree in biology and his Medical Degree from Brown University and Brown University School of Medicine in Providence, Rhode Island. He completed his OB/GYN residency at Mt. Sinai Medical Center in New York City. Board-certified, Dr. Plotnick is also a Fellow of the American College of Obstetrics & Gynecology. Dr. Plotnick serves primarily as a laborist at CHPG Women's Health, providing obstetrical care of normal, complicated and high-risk pregnancies. He also performs Laparoscopic treatment for ectopic pregnancies and uterine preservation surgeries. He is committed to individualized care that focuses on the whole person, not just their condition. Outside of the office, he is a loving father and enjoys spending time with his children in a variety of back country activities including skiing, snowboarding, hiking and camping.