Physicians & Staff
Ryan Welter, MD, PhD
Board Certified Family Practice
Neonatal Advanced Life Support Certified
Advanced Obstetrics Life Support Certified
Dr. Ryan Welter received his medical degree from the University of Oklahoma and graduated from Brown University’s Family Medicine Residency Program. He is board certified in family practice and has training in obstetrical and neonatal life support.
Before completing medical school, Dr. Welter finished a doctoral thesis in biochemistry and molecular biology at Oklahoma State University where he focused on lipid biochemistry.
Dr. Welter has been providing care in Massachusetts at St. Anne’s Hospital in Fall River, and Mediplex Rehab Hospital in New Bedford for several years. His most recent appointment is at Morton Hospital in Taunton where he maintains private practice. Devoted to excellence in patient care, Dr. Welter believes in treating patients as individuals, taking into account the person, not just the illness. He believes in devoting time to patient education and will strive for nothing less than superior medical supervision. Dr. Welter believes in the concept of family medicine. He is a devoted husband and father of seven. As a board certified family practitioner he is qualified to treat all your family’s health problems from routine exams to in-office surgeries and routine obstetrical care.
Brett Stecker, D.O.
Dr. Stecker received his medical degree from New York College of Osteopathic Medicine in Old Westbury, NY and completed his residency at Brown University’s Family Medicine Program. He is board certified in Family Medicine and has a special interest in Sports Medicine. Dr. Stecker enjoys taking care of entire families and believes that through positive interaction with each individual family member.
Dr. Stecker devotes time to continuing medical education, reading recent journal publications, and remaining current with the rapidly changing world of medicine to bring the best care home to his patients. In addition to his professional life, Dr. Stecker enjoys running, reading, cooking and spending time with his cats..
Brian Bonenfant, MHP, PA-C
Brian Bonenfant completed his graduate medical education at Northeastern University, where he received his PA-C degree. He is current president of the Massachusetts Association of Physician Assistants. After graduating from Coyle Cassidy High School, Brian enlisted in the United States Air Force as a medical technician and was honorably discharged. He then completed paramedic training in Mississippi, and then finished his BS in biology at the University of Massachusetts.
Brian has spent his career working in family practice and urgent care. Brian is currently on staff at Morton Hospital, where he practices urgent care and emergency medicine. He is also on staff at Brockton Hospital in their emergency department. Prior to his most recent appointments, he has served on the staff of Boston Medical Center, and the urgent care clinic at Codman Square Health Center, in Dorchester, MA. He and his lovely wife have four children and reside in Taunton.
Kathleen O’Callahan, ANP-C
Kathy joined Welter Primary Care in 2004, following a distinguished career in nursing. She received an adult Nurse Practitioner Masters degree at the University of Massachusetts, seeing patients age 13 and older. Her undergraduate degree is an RN-BSW degree earned from the Children’s Hospital School of Nursing (Curry College).
Her employment experience includes the VA Hospital, Mass Eye and Ear Infirmary, Faulkes and Brigham Women’s Hospital and home health care. This diversity of experience includes emergency assessment and management, orthopedics, ophthalmology, ENT and optimized management of chronic disease. Kathy’s goal is to provide superior care while making a positive difference in her patients’ lives.
The mother of four, Kathy balances personal passions for music, dance and spending time with enjoyable family and friends with her professional mission of health maintenance education. She believes that an individual’s understanding of illness, disease and medical interventions will promote self care, and the maintenance and stability of their health.
Yvonne Rizk, MD
Yvonne graduated with a degree in Preliminary Natural Science from University of Khartoum- Sudan and received her medical degree from Faculty of Medicine University of Khartoum – Sudan. Dr. Rizk trained in Anatomic and Clinical pathology at the Brown University affiliated program and was certified by the American Board of Pathology in 1994. She held the positions of Clinical assistant Professor at Brown University and Adjunct professor of clinical Laboratory Science, Department of Biochemistry and Molecular genetics at the University of Rhode Island in addition to being a Staff Pathologist at Women and Infants Hospital of Rhode Island from 1992 to 2001. Dr. Rizk trained in Pain management from 2002 to 2005 and became a Diplomate of the American Academy of Pain management in 2002 and was the Proprietor of the Pain care center in N. Dartmouth from 2005 to 2008. Dr. Rizk joined Welter Primary Care in 2008 and is now the Director of Pain Management.
Ranjan Dey, MD
Dr. Dey is a Board Certified Pain specialist and has been practicing Pain management for more than eleven years. Dr. Dey graduated from the New York Presbyterian Hospital (Cornell), in Anesthesiology. He completed his fellowship from Beth Israel Deconess Medical Center in Pain management. Dr. Dey was an Assistant professor, Incharge Pain services at the medical College of Virginia, in Richmond Virginia. He is now the director of Pain services for NBA Inc. Dr. Dey’s practice is geared for Interventional Pain management.
“Speak tenderly to them. Let There be kindness in your face, in your eyes, in your smile, in the warmth of your greeting. Always have a cheerful smile. Don’t only give your care, but give your heart as well.”
— Mother Theresa.
Dr. Day is seeing new patients at Tristan Medical in North Attleboro on Mondays. Or call (508) 316-0725.
Paul Keefe, MD
Dr. Keefe graduated from the University of Massachusetts Medical School and received his undergraduate degree from the University of Notre Dame. He has been Medical Director NSTAR, National Grid and Jordan Hospital Occupational Health.
Dr. Keefe is a Diplomate of the American College of Internal Medicine. He is also a Certified Medical Review Officer (MROCC). Dr. Keefe currently provides occupational health care as Medical Director at Tristan Medical in Avon.
Terri A Sullivan, RN, MSN, FNP-C
Terri joined Welter Primary Care in 2010 after working at Morton Hospital in Occupational Health Services for five years. Terri received a Baccalaureate Degree, Nursing Cum Laude from Northeastern University in 1985 and a Masters of Science as a Family Nurse Practitioner from University of Massachusetts in Boston.
Terri is an accomplished FNP-C and has worked in healthcare for the last three decades as a Clinical Instructor for nursing, Clinical Director for Morton Hospital and Nurse Practitioner for Occupational Health Services for several years.Terri’s goal is to provide the quality healthcare and the ability to get someone back on their feet and working.
Jamie Linde, MSN, FNP
Jamie received her undergraduate education at Skidmore College earning a BA in Biology. After college, she worked for Howard Hughes Medical Institute conducting molecular biology research focused on ribosome structure. After two years in research, she attended Georgetown University completing her MSN in Family Practice. Jamie’s experience is vast and crosses many states. She worked for Loudon Pediatrics in Virginia and Johns Hopkins Dermatology and Plastic Surgery in Maryland before returning to Massachusetts. More recently she has worked at Route 44 Medical in Raynham, MA and is currently on staff in the Emergent Department at Good Samaritan Hospital in Brockton, MA.
Her experience allows her to assess, diagnose and treat patients of all ages. She has already earned the trust and following of many patients in and around the area. Jamie joined Tristan Medical in the spring of 2011 and is now serving the local community with passion, care, and quality health care.
Alaina Annichiarico, Physicians Assistant
Alaina Annichiarico completed her graduate studies at the Massachusetts College of Pharmacy and Health Sciences in Boston in 2010 and received a Master of Physician Assistant Studies. Prior to joining Tristan Medical, she spent two years working for Harvard Medical School researching neurobiological and behavior consequences of obstructive sleep apnea and has published her findings. Alaina currently works in both primary and urgent care in Raynham as well as making rounds with the elderly in local nursing homes.
Erika Cheesbro, Physicians Assistant
Erika Cheesbro completed her graduate studies at the Massachusetts College of Pharmacy and Health Sciences in Boston. She earned a Master of Science in Physician Assisted Studies degree and graduated with high honors. She is a member of the American Academy of Physician Assistants and the Pi Alpha Honors Society. She earned her undergraduate degree at Stonehill College in Biology and Psychology.
Erika currently works in several areas at Welter Primary Care Associates providing Primary Care, Urgent Care and Pain Management healthcare.
Erika enjoys outdoor sports such as skiing, snowboarding, hiking, and softball. She enjoys working with a variety of patients and is devoted to providing the best healthcare, peppered with compassion and caring.
Leah Callan, ANP-BC
ANCC-certified Adult Nurse Practitioner
Masters of Science in Nursing, UMASS Dartmouth, Dartmouth MA Diploma RN, Brockton Hospital School of Nursing, Brockton, MA Bachelor’s Degree Biology with minor Chemistry, Stonehill College, N. Easton, MA
14 years experience as nurse practitioner in urgent care, internal medicine, geriatrics, family practice Aesthetic training in Laser, Botox and fillers Medically Supervised Weight Loss Guest lecturer and preceptor, Northeastern University, UMASS Dartmouth, UMASS Boston
11 years experience as critical care nurse, including supervisor 4th busiest Emergency Department in MA, Board-certified Emergency Nursing.
Professional affiliations: Massachusetts Coalition of Nurse Practitioners, Member, Executive Committee Former Co-chair legislative Committee and PR and Marketing Committee Sigma Theta Tau
Awards: MCNP Outstanding Preceptor Award 2007 MCNP Award for Legislative Advocacy 2006
Regina C. Aurelio, MSN,
ANP-BC, COHN-S
Gina received a Masters degree in Nursing from Simmons College and Harvard School of Public Health. She is a board certified as an occupational health nurse specialist. Her undergraduate degree in Nursing was obtained at Northeastern University.
Her career as an Adult Nurse Practitioner has been broad in scope and has focused in areas such as urgent care, primary care, infectious disease, orthopedic care, research case management, employee and occupational health and safety.
Her employment experience includes working in Boston Hospital based facilities as well as in the industry sector. Gina holds her Adult Nurse Practitioner license in Massachusetts and Rhode Island. She currently serves as a provider in the New Bedford facility.
Gina maintains active membership of professional nurse practitioner organizations including the American Association Occupational Health Nurse, American Academy Nurse Practitioner and American Coalition of Nurse Practitioners.
Gina’s goal is to provide optimal medical care while maintaining a comfortable atmosphere to treat individual needs. She is married with three children, enjoys traveling and teaching.
Susan Sullivan, MHP, PA-C
Susan Sullivan completed her graduate degree at Northeastern University. She completed her undergraduate degree at Stonehill College graduating summa cum laude with a BS in biology.
Susan’s past experience as a physician assistant has been in both internal medicine and urgent care. She has worked in healthcare for more than thirty years.
Susan’s goal is to provide her patients with superior preventative medical care in order to improve the quality of their lives presently and in the future.
