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Meet Our Family Medicine Residency Program Faculty at UPMC Williamsport

Jeffrey N. Verzella, MD – Program Director

Jeffrey N. Verzella, MD

Specialty: Family Medicine with Obstetrics
Medical School: SUNY Health Sciences Center at Syracuse
Residency: Tripler Army Medical Center
Board Certification: American Board of Family Medicine

"Ahhhh, Hawaii was nice, but Williamsport wins hands-down when it comes to Family Medicine education," states Dr. Verzella, who has been a full-time teacher since graduating from residency in 1985. He has been teaching here since 1989, after four years at Ft. Bragg, N.C., in the Army Family Medicine Residency program there. He continues to teach and has now assumed the role of Program Director. Of major interest is his development of clinical templates for patient care and documentation, billing, and coding. In his free time (what free time?), Dr. Verzella is an avid sports fan and amateur astronomer.


Dana Kirschner, DO – Assistant Program Director

Dana Kirschner, DO

Specialty: Family Medicine with Obstetrics
Medical School: Rowan University School of Osteopathic Medicine
Residency: Williamsport Family Medicine Residency
Board Certification: American Board of Family Medicine, American Osteopathic Board of Family Physicians

In the spring of 2015, Dr. Kirschner headed to Williamsport to start her residency training in family medicine. She never believed she would fall in love with the scope of practice and the town of Williamsport in three short years, or that she would be offered a full-time faculty position. The training she received during residency allowed her to be comfortable teaching and practicing in all aspects of family medicine. She especially loves the obstetrics part of her practice, where she can form relationships with moms, help them bring their children into the world, and then watch their children grow. She also enjoys caring for LGBTQ and Spanish-speaking patients.

Outside of her passion for medicine, Dr. Kirschner enjoys spending time with her husband, daughter, and their two cats watching Philadelphia sports team games. She loves traveling to Cape May to spend time with extended family and enjoys cooking and baking.


Elizabeth E. Anderson, MD, FAAFP – Associate Director

Elizabeth E. Anderson, MD, FAAFP

Specialty: Family Medicine with Obstetrics
Medical School: UMDNJ-Robert Wood Johnson Medical School
Residency: Williamsport Family Medicine Residency
Board Certification: American Board of Family Medicine

A 1991 graduate of the Williamsport Family Medicine Residency Program, Dr. Anderson worked at Loyalsock Family Practice in Williamsport for 22 years. During that time she kept involved in the residency program by working as an outpatient preceptor and colposcopy instructor for the residents. She then transitioned to full-time faculty within the residency program and is now an Associate Medical Director. Dr. Anderson cares for patients of all ages, seeing patients in nursing homes and making home visits. Her favorite parts of “family doctoring” have been the time spent delivering babies, and then babies to those babies! She now enjoys caring for two, three and four generations of families. She is especially passionate about women's health issues, interconception care, 4th trimester care, lifestyle medicine and geriatrics/end-of-life care, but she truly enjoys all aspects of family medicine. When not at work, Dr. Anderson keeps very busy with her family. She and her husband have four grown children—one of whom decided to accept a position to teach in a family medicine residency program! Also very involved in her church, Dr. Anderson volunteers in the health ministry department by teaching healthful cooking classes and leading out in seminars such as Diabetes Undone, singing in the church choir, and serving as the head deaconess coordinating care for those in need. She also enjoys traveling, gardening, and biking.


John N. Boll, Jr., DO, FAAFP – Associate Director

John N. Boll, Jr., DO, FAAFP

Specialty: Family Medicine with Obstetrics
Medical School: Philadelphia College of Osteopathic Medicine
Residency: Williamsport Family Medicine Residency
Board Certification: American Board of Family Medicine

Dr. John Boll is a native of Pennsylvania who joined the faculty after working in an underserved setting in eastern Tennessee for ten years. While practicing in a town of 1,500 people, Dr. Boll was able to care for a broad range of medical conditions from newborn and obstetric care to providing home visits and end-of-life care. He also was very involved in the management of a community health center and directed a community garden on his property in Tennessee. He brings this broad experience to the residency and can offer a different perspective in regards to providing medical care from this experience. Dr. Boll enjoys providing care to the entire family and has seen the value of developing meaningful relationships with his patients. Building these relationships enables patients to trust the medical care provided and for the physician to better tailor evidence-based care to the needs of the patient. In addition, Dr. Boll likes to read and research medical questions and is always looking for ways to improve his patient's’ care. Apart from his activities in the residency, Dr. Boll and his wife, Jennifer, have five children who are active in music and sports.


Timothy M. Heilmann, MD, FAAFP – Associate Director

Timothy M. Heilmann, MD, FAAFP

Specialty: Family Medicine with Obstetrics
Medical School: Jefferson Medical College
Residency: Forbes Health System
Board Certification: American Board of Family Medicine, American Board of Preventive Medicine - Clinical Informatics

Dr. Heilmann's initial practice experience was in a small town in northwestern Pennsylvania—in a setting so rural that there was even a hitching post behind the office for patients to tie their horses to. That rural setting provided an opportunity to practice the full spectrum of family medicine, from delivering babies (some at home) to fracture management, to making house calls, performing office surgery and visiting nursing homes. Dr. Heilmann brings all of those experiences and skills to the residency; many of his precepting sessions and mini-lectures begin with the words "Well, when I was back in private practice." Lest it be said that he is just an "old-fashioned country doctor," however, he also has a keen interest in evidence-based medicine and coordinates the residency's Journal Club to teach and explore EBM principles and practices in detail. Dr. Heilmann has also been very active in designing computer programs for teaching and for automating various residency functions, and he serves in the role of CMIO for the Susquehanna Health Medical Group.

A '79 graduate of the University of Notre Dame, Dr. Heilmann is a die-hard Fighting Irish fan (is there any other kind?); experienced residents know to tread lightly around him on Fall Mondays if the Irish have had a bad Saturday on the gridiron. Dr. Heilmann also puts the "family" in family medicine; he and his wife, Susie, are the proud parents of seven children. He is active in the Knights of Columbus; local community theatre; and a lector, cantor, and choir member at St. Ann Church. Dr. Heilmann has been very involved in organized medicine at the state and national level, having served for years on the Pennsylvania Academy of Family Physicians board of directors and as chair of the Residents and Student Affairs Committee. He is a past president of the Pennsylvania Academy of Family Physicians (PAFP).


Brian Kaderli, MD – Assistant Director

Brian Kaderli, MD

Specialty: Family Medicine with Obstetrics
Medical School: Temple University School of Medicine
Residency: MAHEC Hendersonville Rural Family Medicine Residency Program
Board Certification: American Board of Family Medicine

Dr. Kaderli came to our residency program after serving as a faculty member in Western North Carolina, where he found a passion for academics and full-spectrum family medicine. He grew up in South Central Pennsylvania and returned to the state in 2020 to become a faculty member at UPMC Williamsport. He was specifically drawn to our program due to our commitment to full-spectrum practice, our commitment to the underserved and our community, and our emphasis on education and innovation.

Dr. Kaderli is passionate about advocating for the expansion of the scope of practice for family doctors nationwide, but especially in rural and underserved areas. He particularly enjoys the opportunity to practice inpatient medicine, obstetrics, and to teach a collection of motivated and talented residents. His areas of interest in academics include digital content creation, video curriculum development, and ultrasound.

Outside of medicine, Dr. Kaderli spends his free time with his wife, Kristin, chasing around their two children, and is an avid sports fan, cinephile, and lover of Thai cooking.


William F. Keenan, Jr., MD – Associate Director

William F. Keenan, Jr., MD

Specialty: Family Medicine
Medical School: University of Massachusetts Medical School, MA
Residency: Harrisburg Hospital
Board Certification: American Board of Family Medicine and CAQ in Geriatrics

Dr. Keenan runs the Dermatology Clinic in the Family Medicine Residence Center where residents get direct hands-on training in common dermatoses and procedures. He has a special interest in the care of older individuals and has a CAQ in Geriatrics. He also has a special interest in dermatology as seen in primary care. As the physician for St. John Neumann Junior/Senior High School, he is also interested in sports medicine.

On a personal note, Dr. Keenan enjoys photography, computers, and being involved in his children's activities, which include Special Olympics and competitive fencing.


Nicole Miele Knarr, LCSW – Assistant Director

Nicole Miele Knarr, LCSW

Nicole Miele Knarr is the Behavioral Scientist at the Williamsport Family Medicine Residency. She enjoys working in an academic setting collaborating with the residents on behavioral health issues that affect our patients' overall health.

Nicole is a Licensed Clinical Social Worker (LCSW). Nicole received her master’s degree from Marywood University in Scranton, PA. She has managed a private practice for 20 years working with children, teens, families, and the geriatric population. In addition to her practice she has worked in a variety of settings. Person-centered approach is an integral part of her practice.

Outside of work, Nicole enjoys spending time with her husband, family, and friends. She loves cooking/baking and travelling.


Luan V. Pham, MD – Associate Director

Luan V. Pham, MD

Specialty: Family Medicine
Medical School: Penn State College of Medicine
Residency: Williamsport Family Medicine Residency
Board Certification: American Board of Family Medicine

Dr. Pham grew up and attended college in the greater Philadelphia area. He developed an interest in primary care during his time at Penn State Hershey Medical Center’s College of Medicine. After completing his family medicine residency at Williamsport in 2011, he decided to move back to central PA to work at a federally-qualified health center look-alike in Carlisle. Although he enjoyed his time there, he missed practicing inpatient medicine in an academic setting and interacting with residents and medical students. For these reasons, he enthusiastically accepted a faculty position at the Williamsport Family Medicine Residency in 2014.

Dr. Pham’s professional interests include practice management, preventative, and underserved medicine. Besides spending quality time with his wife and four children, he also enjoys music and sports. Over the past few years, Dr. Pham has also developed an interest in carpentry and home renovation.


Janice L. Schifferli, DO – Director of Osteopathic Education and Associate Director

Janice L. Schifferli, DO

Specialty: Family Medicine with Osteopathic Manipulation and Prenatal Care
Medical School: Lake Erie College of Osteopathic Medicine
Residency: Williamsport Family Medicine Residency
Board Certification: American Board of Family Medicine, American Osteopathic Board of Family Physicians, Diplomate of the American Board of Obesity Medicine

Dr. Schifferli has always had a passion for teaching and upon graduation from our program in 2008, she became a full-spectrum faculty member and set her sights on nurturing our residents. “When training residents, my personal goal is to graduate competent physicians that I would feel comfortable sending my own family members for care.”

Prior to entering the medical field, she played Division I Softball during her undergraduate career at Canisius College in Buffalo, NY and was named NCAA Academic All-American. Her love for athletics and respect for the human body guided her decision to pursue a career in Osteopathic Medicine. Thus, she plays an integral role in developing and implementing the osteopathic curriculum.

As her career progressed, Dr. Schifferli found it discouraging to continue to prescribe medications for lifestyle induced illnesses. She took it upon herself to pursue additional education in wellness and nutrition so that she could appropriately counsel her patients. She is now a proud Diplomate of the American Board of Obesity Medicine. Her passion currently resides in teaching the residents about how obesity and its direct comorbidities can be influenced by dietary modification and exercise.

Outside of the hospital, Dr. Schifferli and her partner are dedicated to building a nurturing environment for their three children. She finds solace in running through the beautiful Susquehanna Valley, high intensity interval traininge, ducating people about the health benefits of implementing a whole-food plant based diet, and watching her children grow.