Our Faculty


Stephen A. Ratcliffe, MD, MSPH
Program Director

Dr. Steve Ratcliffe became program director of the LG Health Family Medicine Residency in July 2002, succeeding Dr. Nikitas Zervanos who founded the program in 1969 and served as director for 33 years.  Previously, Dr. Ratcliffe had maintained a continuity practice in a federally qualified health center in Salt Lake City, Utah for 20 years.  From 1993 to 2002, he also served as Family Medicine Division Chief and Residency Program Director at the University of Utah.

Dr. Ratcliffe has had a career long interest in maternal child health, particularly in the area of low birth weight/prematurity prevention that he has been able to sustain in his leadership roles at Lancaster General.  He is the founder of the Family Medicine Education Consortium IMPLICIT Network, a practice-based Continuous Quality Improvement Network of family medicine residency programs in the Eastern US since 2003.  The Research Institute at LGH has provided the data management and analytics for this network.

Dr. Ratcliffe had had a long term interest in teaching and writing in the maternal child health arena as well.  He is an original contributor to the Advanced Life Support in Obstetrics Course and taught in numerous courses over the past 25 years.  He has been a regular presence on the faculty on the AAFP Family Centered Maternity Care Conference and since 2008 has been the course director of this event.  He has served as the senior editor of the three editions of the textbook Family Medicine Obstetrics.

Dr. Ratcliffe enjoys the terrific support he receives from all directions:  Lancaster General Health, his leadership team, a talented and highly committed faculty, extraordinary residents and program/nursing staff and very appreciative patients.  He and his wife Anita have five wonderful adult children and a very special new granddaughter.




Donna Cohen, MD, MS
Deputy Director

Dr. Cohen is the Deputy Director of the LG Health Family Medicine Residency Program. She graduated from Jefferson Medical College in 1999 and then completed her residency at the Lancaster General Health Family Medicine Program, serving as co-chief resident during her third year. Following residency, she completed a two-year Academic Fellowship at Boston University Medical Center where she developed her research and clinical interests in women's health and health services. She oversees Centering Pregnancy for the residency program along with Dr. Fogleman and Dr. Freedman. The past recipient of Obstetric Teacher of the Year and Faculty Teacher of the Year awards, she is passionate about teaching and mentoring residents. She and her husband, Stu, have three daughters, Noa, Ariel and Ellie who keep them busy and smiling.



Pamela A. Vnenchak, MD
Assistant Deputy Director
Chair of Department of Family & Community Medicine Lancaster General Hospital/Penn Medicine

Dr. Vnenchak is the Assistant Deputy Director of the LG Health Family Medicine Residency Program. She graduated from Elizabethtown College with a BS degree in Biology, Magna Cum Laude, attended the University of Medicine and Dentistry New Jersey Medical School (now known at Rutgers New Jersey Medical School) where she obtained her MD degree in 1990. In 1993 she completed her Family Medicine Residency at Lancaster General Hospital where she was also Chief Resident. After residency she joined Valley Family Physicians in Claremont, NH as a family physician for three years. She also served as Assistant Professor (clinical investigator) at the Family Medicine Residency at LaFayette Family Health Center in LaFayette, NY. She joined our faculty in 2000. In 2015 was named Chair of the Department of Family Medicine of Lancaster General Health/Penn Medicine.  Her clinical interests center on women's and children's health. Dr. Vnenchak and her husband have four children, including teenage triplets.



Kathryn C. Abello, MD 
Dr. Abello is a graduate of Johns Hopkins University and Penn State College of Medicine. After completing an OB/GYN residency at the University of Maryland, she worked in a busy private practice in Baltimore, Maryland, for 12 years. She especially enjoys teaching residents and students. She focuses on high-risk obstetrics, as well as management of common gynecologic complaints, such as pelvic pain and dysfunctional uterine bleeding. She is happy to be moving back to Lancaster with her husband Robin and their four children.



Andrew S. Coco, MD
Associate Director

Dr. Coco joined the faculty in May 1995, and is Director of the Health Research Center within the Family and Community Medicine Department. Dr. Coco is a graduate of the University of Connecticut with a BS degree, the Harvard School of Public Health with an MS degree and the University of Massachusetts Medical School. Prior to medical school, Dr. Coco spent three years in the Peace Corps in western Africa, developing preventive health programs. He completed his residency at Contra Costa Medical Service in Martinez, CA in 1989 and served six years working at the community clinic in rural northern California prior to joining our faculty. Dr.Coco became certified as an HIV specialist in 2002 and sees a number of patients with this diagnosis. His research interests involve maternity care, HIV prevention, acute otitis media and cost-effective studies.



FaizonRobert Faizon, MD
Dr. Faizon is an Obstetrician/ Gynecologist who joined the Family and Community Medicine clinical faculty in July 2004. He is a graduate of the University of Pittsburgh School of Medicine. He completed his OB/GYN residency at the Yale School of Medicine OB/GYN Program at Bridgeport Hospital. He served four years in the US Air Force as the Medical Director of the 436 Medical Group OB/GYN Department. His medical interests include primary care for women and minimally invasive surgery.



FifeWilliam A. Fife, Jr., M.D.
Associate Director

Dr. Fife joined our faculty in 2014. After teaching high school chemistry and biology in the Bronx, New York, he attended medical school at the State University of New York at Brooklyn (Downstate) and then the Lancaster General Hospital Family Medicine Residency Program. Upon completion of residency, he worked as a full spectrum family physician with a focus on HIV, addiction and emergency care at Twin Rose Primary Care for 4 years. He then served as chief medical officer and a practicing family physician at Southeast Lancaster Health Services, the federally qualified Health Center in Lancaster city for 10 years. Since completing residency, he has also seen patients at Comprehensive Care medicine and has maintained his certification as an HIV specialist. His special medical interests include urban medical care, HIV care and community medicine. In 2009, he was honored by the Pennsylvania Association of Community Health Centers as the Outstanding Primary Care Clinician of the year and in 2010 by the Lancaster General Medical Staff with the Physician Achievement Award for Community Service. He enjoys running, reading, bicycling and most of all spending time with his family, his wife Amanda, a local midwife, and his 2 children Aidan and Issy.



FoglemanCorey D. Fogleman, MD, FAAFP
Associate Director

Dr. Fogleman joined the faculty in September 2010. He is a graduate of the University of North Carolina at Chapel Hill, with a BA in 1996 and an MD in 2000. After completing the LG Health Family Medicine Residency Program he joined the US Air Force and spent seven years with the military. He went on to complete the UCLA Medical Acupuncture for Physicians program and continues to practice acupuncture as well as full spectrum family medicine. He is an Assistant Editor and frequent contributor to American Family Physician and is actively involved in the FMEC IMPLICIT project. Along with Dr.'s Cohen and Freedman, he oversees the CenteringPregnancy program for the residency. He is the Medical Director of Family and Maternity Medicine.  The recipient of several teaching awards, his interests include women's health, integrative medicine, sports medicine and narrative writing. Dr. Fogleman's poems have won national awards and been published in several journals including JAMA and Annals of Internal Medicine. He married his college sweetheart; together he and Kelly enjoy reading, running, hiking, and spending time with their three young children.



FreedmanBeth E. Freedman, MD
Associate Director

Dr. Freedman joined the faculty of the Residency Program in July 2014. She grew up in Central PA and attended Millersville University where she graduated with a BA in Psychology. Upon graduation, she provided emergency support for those struggling with mental illness and addictions in her work with Crisis Intervention. She was very fulfilled with her job helping others, but could not ignore the calling to better understand and serve the whole person as a physician. She completed her medical education at Penn State College of Medicine in Hershey, PA and found the LG Health Family Medicine Residency Program to be a perfect fit for her to continue her training to become a well-rounded family physician. After completion of the faculty development fellowship, she joined the faculty with enthusiasm to teach importance of quality primary care in our ever-changing healthcare system. Dr. Freedman's interests include addictions medicine, maternity care and centering pregnancy.



HamblinCherise Y. Hamblin, MD
Dr. Cherise Hamblin is a native of New York City. She first came to Lancaster while attending Franklin & Marshall College. She attended medical school at Northwestern University in Chicago and completed her residency in Obstetrics & Gynecology in Phoenix, AZ. In August 2011 she returned to Lancaster and joined the Family & Maternity Medicine faculty as an Associate Director of OB/GYN. Dr. Hamblin has a special interest in robotic and minimally invasive surgery.




Christian Hermansen, MD
Associate Director/ Regional Medical Director

Dr. "Herm" graduated from Jefferson Medical College and was introduced to Lancaster shortly thereafter. He graduated from the Lancaster General Health Family Medicine Residency Program and was honored with the Society for Teachers in Family Medicine Resident of the Year award. After two wonderful years in Christian-based private practice in New Jersey, he was called to Lancaster to combine private and academic family medicine. He also serves as Managing Physician of Downtown Family Medicine and oversees the LGHP Academic Practices as Regional Medical Director. He is a past recipient of the Faculty Teacher of the Year and serves as deacon of his church. Feel free to discuss financial peace, sports (Go Phillies, Flyers and Eagles!), or the book you're currently reading when you see him. After work, however, Dr. Hermansen can't wait to enjoy family life with his wife, Heather, and his three boys, Timothy, Benjamin and Nathaniel. Follow more of the activities of the Residency Program on twitter: http://twitter.com/#!/LGFamMedRes



KilbournCynthia L. Kilbourn, MD
Associate Director

Dr. Kilbourn serves as the Coordinator of our Integrative Medicine area of concentration. She is a 1987 AOA graduate of the University of Pennsylvania School of Medicine and completed the residency program in family medicine at the Ventura County Medical Center in Ventura, California. In 1990, she completed a fellowship in operative obstetrics at Ventura County and then served as OBGYN faculty there until 1993. From 1994 – 1996 she worked with Highland Physicians in Honesdale, PA where she had a busy inpatient practice including obstetrics, pediatrics, medicine and geriatrics. She and her husband, Mark Rast MD, joined the faculty in September 1996. Since joining the faculty, she worked on developing and implementing the obstetrics curriculum, serving as co-coordinator of the Obstetrics area of concentration until 2015. Most recently, she completed an Integrative Medicine Fellowship through the University of Arizona, subsequently designing the Integrative Medicine area of concentration. She contributes to the health of the Lancaster community by teaching yoga and meditation and co-leading wellness intensives through Middlewaywellness.



Jeffrey T. Kirchner, DO, FAAFP, AAHIVS
Associate Director

Dr. Kirchner joined the faculty in August 1996. He is a graduate of the Philadelphia College of Osteopathic Medicine and completed his Family Medicine residency at Abington Memorial Hospital. After residency, he worked for the Health Care for the Homeless Project in Washington, DC and was later in a private group practice in Lancaster city from 1990-1996. Dr. Kirchner's primary medical interests include HIV/ AIDS, addiction medicine, writing and medical publications. He has published extensively in numerous medical journals and textbooks. He is a former Associate Editor of American Family Physician and serves on the editorial boards of Postgraduate Medicine and the Journal of Family Practice. He is the medical editor of the HIV Specialist. He currently serves as Medical Director of Comprehensive Care Medicine, a federally funded Ryan White clinical program within the Family Medicine Residency Program that provides care for adults living with HIV/AIDS. He is certified as an HIV Specialist by the American Academy of HIV Medicine and serves on the national board of AAHIVM. His additional interests include distance running and medical humanities.



Heidi T. Kistler, MD
Associate Director

Dr. Kistler joined the faculty in July, 2012, after nearly five years of full-spectrum private practice at Twin Rose Family Medicine, in nearby Columbia, PA. Having grown up mostly in Pennsylvania, she received her BA in Sociology/Anthropology from Carleton College, MN, and returned to her home state to attend Penn State University's College of Medicine in Hershey. She is a 2007 graduate of LG Health Family Medicine Residency. Honors include the Leonard Tow Humanism in Medicine award (2004), STFM Resident Teacher of the Year award (2007) and Preceptor of the Year award (2010). Professional interests aside from teaching include maternal child health, pediatric literacy promotion and global health. Dr. Kistler and her husband Greg are proud parents of two active young boys.



Dr. LakeAdam Lake, MD, AAHIVS, CMQ
Associate Director

Dr. Lake is a Lancaster native who joined the faculty in August 2015 after completing a fellowship in population health. He returned to the county after studying linguistics and biochemistry at Grinnell College, medicine at Temple University, and permaculture & traditional medicine in Latin America. He completed his family medicine residency at Lancaster General with an AOC in HIV medicine. His population health fellowship allowed him to look deeper at health system complexities, and expand on his interest in Hepatitis C/HIV co-infection treatment. Other medical fields of interest include research, addiction medicine, behavioral economics, and the impact of poverty on health and health behaviors. In June of 2015 he and his wife, Dr. Jen Payne, welcomed their son, John Francis, into the world. Outside of medicine and being a dad, his interests include biking, rock climbing, backpacking, podcasts, fermenting, cooking, and gardening.



LawrenceYolanda Lawrence, MD
Associate Director

Dr. Yolanda Lawrence joined the faculty in 2012. She received both her undergraduate degree and her medical degree from the University of Vermont, where she was chosen to be a member of Tau Beta Pi Engineering Honor Society and Alpha Omega Alpha Medical Honor Society. She completed her Family Practice Residency and Faculty Development Fellowship at Ventura County Medical Center. Upon completion of her fellowship she returned to her husband's home town of Springfield, Vermont, where she practiced full spectrum family medicine for 15 years. There she learned much about being a physician in a small town where your patients are your friends and neighbors. She continues to instill the love of practicing in rural America in the residents at Lancaster General Health. Dr. Lawrence and her husband Dave have two children, Rebecca and Nicholas.



Jeffrey Roth Martin, MD, FAAFP
Associate Director

Dr. Martin joined the faculty of the Residency Program in December 1999. He graduated from Goshen College in Indiana and attended the University of Colorado School of Medicine where he graduated with honors in 1993. In 1997 he completed his family medicine residency at Lancaster General Hospital. During residency he received the Mead-Johnson Award for Family Practice Graduate Medicine. He helps with the community medicine/ population health curriculum and has an interest in the genetic basis of disease and family history. Recently, he helped develop and is the Managing Physician for Care Connections, an innovative, trans-disciplinary, primary care clinic for the highest utilizers of our health system. He is involved with several community endeavors including Medical Director at Vantage House, a long-term drug-rehab program for women and children, founding member of the Partnership for Public Health, Director of the Lancaster County Lead Coalition and Medical Director at IU-13 (provider of intellectual and physical disability services to school-aged children). He enjoys bicycling, skiing (out west) and discovering his own Lancaster County Mennonite family history. Dr. Martin and his wife Kristina are the parents of three children.



MartinPamela Martin, DO
Dr. Martin is an Associate Director of the Obstetrical Curriculum Program, joining the faculty in 2002. She helps coordinate OB management and runs our busy OB Clinics and Surgical programs. Dr. Martin is a graduate of Kirksville College of Osteopathic Medicine, in Missouri, and completed her residency at the University of Medicine and Dentistry of New Jersey in Obstetrics and Gynecology. Her interests are in gynecological surgery, physical examination and high risk obstetrics. She returned home to Lancaster County in 2002 to care for patients in her "hometown!" Away from work, she enjoys spending time at home with her three children....and the dogs, goats and chickens!



McKennaKathryn A. McKenna, MD
Dr. McKenna joined the faculty in August 2016 after graduating from the residency program in June 2016. She graduated from the University of Notre Dame where she studied Biological Sciences and then completed University of Maryland’s dual degree MD/MPH program in Baltimore. She pursued her interest in full-spectrum family medicine and community medicine while completing her residency at the Lancaster General Health Family Medicine Program, where she also served as chief resident and completed an AOC in Integrative Medicine. Her interests within medicine include community and population health, maternity care, integrative medicine with a focus on nutrition, and obesity management and prevention. While she did not live in PA prior to residency, she and her husband have loved settling into and making the Lancaster community home. Outside of medicine, she enjoys spending time with her husband Mike and their two dogs, cheering on the Fighting Irish, exploring Lancaster’s flourishing food scene, and playing soccer.



MorenoKari Oftedal Moreno, MD
Associate Director

Dr. Oftedal Moreno joined the faculty in 2013 after completing fellowship training in Hospice and Palliative Care at Lancaster General Health and Hospice and Community Care. She completed medical school at Georgetown University School of Medicine in 2009 and graduated from the LG Health Family Medicine Residency Program in 2012. Given her background, she oversees the residency elective as well as the area of concentration in Hospice and Palliative Care in addition to coordinating the residency morning report series. Dr. Oftedal Moreno enjoys practicing broad spectrum family medicine including obstetrics. She and her husband Patrick, also a family physician practicing in the area, spend most of their time outside of medicine keeping up with their sons Simon and Jonah and their puppy Molly.



NeppsPeggy Nepps, PsyD
Associate Director

Dr. Nepps is a licensed psychologist and Coordinator of Behavioral Science for the Program. A graduate of St. Joseph’s College, Philadelphia, Dr. Nepps received her doctoral degree in clinical psychology from Rutgers University in 1982. She gained experience as a supervising psychologist at Beth Israel Medical Center in New York City, where she had previously completed her internship in clinical psychology. Dr. Nepps was a member of the faculty of the Family Medicine Residency at St. Joseph’s Medical Center in Yonkers, New York from 1985 until 1988, when she joined the staff of Lancaster General Hospital. She currently coordinates and provides teaching in behavioral science and psychiatry. Dr. Nepps teaches research methods and directs the resident research program. Dr. Nepps has published articles on smoking cessation, obsessive-compulsive disorder, animal-assisted therapy and psychotherapy outcomes. She has special interest in cognitive behavior therapy, animal-assisted therapy and childhood obesity. Dr. Nepps is a member of the Pennsylvania Psychological Association and the Society of Teachers of Family Medicine.



Dr. PlensdorfScott Plensdorf, MD
Associate Director

I am a new arrival to the LGH Family Medicine Residency program this year. After graduating from Wayne State University School of Medicine in Detroit, MI, in 1992, and completing residency in family medicine at St. Mary’s Hospital in Grand Rapids, MI, in 1995, I served as a staff physician and department chair at Mountain Home Air Force Base in Idaho, before returning to Michigan to begin my teaching career. From 1999-2016, I was full-time faculty at Mclaren Family Medicine Residency Program in Flint, MI, serving my last 3 years there as Program Director.

I have long been an advocate for providing full-spectrum care to patients and teaching residents how to do the same. I have a strong interest in dermatology and office procedures, and plan to continue to share that expertise in my new role at LGH. Additionally, I continue to be active in practicing obstetrics, with additional expertise in OB ultrasound, which I plan to integrate within the resident curriculum here. My other interests include resident physician leadership development, emotional intelligence, and integrated behavior health, all of which I will continue to share with physician learners at all levels.




RastMark L. Rast, MD
Associate Director

Dr. Rast is a graduate of Brown University and the University of Pennsylvania School of Medicine, where he received the Nikitas Zervanos, MD Award for Family Medicine upon graduation. He completed his residency at the Ventura County Medical Center in Ventura, California. Following graduation he developed a county-sponsored family practice clinic, Las Islas Family Medical Group in Oxnard, California, with several fellow residents. There he practiced full-spectrum family practice with an emphasis on obstetrics. He then worked with Highland Physicians Honesdale, Pennsylvania, providing full-spectrum care including obstetrics, geriatrics and a high volume inpatient practice until he joined the faculty at LG Health in September 1996. His special interests include care of the underserved and improving care delivery, psychiatry/psychology and family medicine, addictions medicine and motivational interviewing. He also very much enjoys continuing to practice full spectrum family medicine. Dr. Rast is married to Cynthia Kilbourn, MD, and they have three amazing young adult children. He is an avid banjo player and plays bluegrass and old time music whenever possible.



Dr. ShankCrischelle Shank, MD
Associate Director
Dr. Shank joined the faculty in 2015 as the coordinator for global health curricula. She grew up internationally, did undergraduate degrees in Biology and Nursing at Southern Adventist University in TN, then medical school at Loma Linda University in CA. Shortly after graduating from this residency in 2007, she served for 7 memorable years at Malamulo Hospital, a large faith-based hospital in a poor region of southern Malawi. Her current role as global health faculty allows her to travel with residents to do on-site teaching internationally for a month every year. Outside of medicine she enjoys travel, music, cooking, and hanging out with her dog, Bella.




SieberRebecca Sieber, MD
Dr. Sieber is an obstetrician/gynecologist who joined Family and Maternity Medicine after completing her residency in 2014. Dr. Sieber is a native of Kansas and attended Goshen College. She attended graduate school in social work at the University of Kansas and began her career as a medical social worker. After several years of practice, she made the decision to become an obstetrician/gynecologist and graduated from The Ohio State University School of Medicine. She then attended residency at Pennsylvania Hospital in Philadelphia. She, along with her husband and children, relocated to Lancaster County where they are restoring an 18th century farm house. Dr. Sieber is fluent in Spanish and has a special interest in working with immigrant women. Her additional interests include resident education, gyn surgery and hypertensive disorders in pregnancy.



StewartJonathan D. Stewart, MD
Associate Director/Medical Director

Dr. Stewart joined the faculty in 2014 as the Medical Director of the Walter L. Aument Family Health Center in Quarryville. He hails from Virginia where he attended medical school at UVA and met his physician wife, Christi. He completed his family medicine residency at LG Health in 2006. Following graduation he worked in private practice in Lancaster until returning to the residency fold with a strong desire to help train residents in orthopedics and practice management. An avid runner, Dr. Stewart enjoys sports medicine and orthopedic procedures. Besides chasing after his two young boys, Dr. Stewart loves rock climbing, hiking, traveling, and working outside.



WhitmanKristy L. Whitman, MD
Dr. Whitman is an obstetrician/ gynecologist and joined Lancaster General Health Physicians Family and Maternity Medicine after completing her residency training in 2009. She attended medical school at the Pennsylvania State University College of Medicine in Hershey, PA. She then completed her residency in obstetrics and gynecology at the University of Massachusetts Medical Center in Worcester, Massachusetts. She moved back to central Pennsylvania with her husband, Zachary, who is a family medicine/sports medicine physician in the area. They have enjoyed living in Lancaster and raising their two daughters here.



AdamAdam S. Wilikofsky, PhD
Associate Director

Dr. Wilikofsky is a member of the Residency Program's Behavioral Science faculty. He graduated from Yale University and received masters and doctoral degrees in clinical psychology from the University of North Carolina at Chapel Hill. He completed his internship in clinical psychology at Beth Israel Medical Center in New York City, worked as a psychologist in the North Carolina public mental health system, and later returned to Beth Israel as a supervising psychologist and Predoctoral Psychology Internship faculty member. He has been at Lancaster General Hospital since 1988. Dr. Wilikofsky directs the residency program’s Interviewing and Family Therapy curricula. In addition to his residency program roles, he serves as a provider coach for LGHP clinicians and part of the Care Connections program for high utilizing medical consumers.



Nikitas Zervanos, MD
Director Emeritus

Dr. Zervanos served as the full-time Director of the Family Medicine Residency Program from July 1969 until July 2002. Since his retirement, he continues to participate part-time in the program by caring for his patients and precepting the residents in the program's Family Practice Center. He also serves as Director of the popular Temple University/Lancaster General Hospital Family Medicine Review Program.