Your Doctor’s Immediate Care Team

Our team of physicians, nurse practitioners, medical staff, and others all have one goal: make sure our patients know how much we care about them, their families, and their wellbeing. We work every day to keep this a priority while working with a patient’s schedule, seeing them for an appointment, and following up to gain an insight into their experience with us.

Our Physicians

Yvonne McAllister, M.D.

Dr. Yvonne P. McAllister grew up in Macon and received her medical degree from the Medical College of Georgia in 1982. Upon completion of her residency training at the Medical Center of Central Georgia, Dr. McAllister remained on as an Associate Director of that same program as well as an Instructor for Mercer Medical School.  She left academia to enter full-time private practice in 1987. Some of her accolades include graduating with honors, and an appointment by the Governor to a consulting committee. Dr. McAllister is certified by the American Board of Family Medicine (ABFM) and is a Fellow of the American Academy of Family Physicians (AAFP).  She prides herself on attention to detail and compassion for her patients.

Paul Mossman, M.D.

Dr. Paul Mossman graduated from London University and received his medical degree from Royal London Hospital Medical College. He is a past member of the Bibb County Board of Health, serving eight years and is a past member of the Medical Association of Georgia. He is board certified in Family Practice and is a fellow of the American Academy of Family Physicians (AAFP). He has six grandchildren and enjoys spending his free time playing tennis, golfing, hunting, and farming.

Gregory Harold, M.D.

Dr. Gregory Harold attended The Medical College of Georgia and received his medical degree in 1980.  He completed his family practice residency at the Medical Center of Central Georgia in 1983.  After completing residency, Dr. Harold practiced emergency medicine and urgent care medicine until 1986.  In 1986 Dr. Harold went into private practice in Perry Georgia for 23 years. Dr. Harold is happily married with 3 children and 7 grandchildren.

Nalini Ramaiya, M.D.

Dr. Nalini Ramaiya received her medical degree from Bombay University and completed her residency at the Medial Center of Central Georgia. Dr. Ramaiya exemplifies a well-rounded Emergency Room physician with over 35 years of experience in Emergency Medicine. She dedicated 32 years of her career to Coliseum Medical Center, in which she served as an active member to multiple committees. Amongst being Board Certified she also holds fellowship with the American Academy of Family Physicians. Dr. Ramaiya is not only an avid traveler with a genuine passion for medial mission trips, but she is also, a very vocal female advocate. She has traveled to many different countries, included but not limited to Kenya, Vietnam, Cambodia, Peru, South Africa, the Caribbean Islands, and also the Fijian Islands. She enjoys cooking delicious world cuisines, herbal gardening, and reading non-fictional novels.

Our Nurse Practitioners

Darrell Thompson, RN, DNP, ACNP-BC, FNP-BC

Darrell Thompson is an accomplished 30-year nursing professional with significant experience in adult, pediatric, psychiatric, acute and family care. He graduated with his Doctor of Nursing Practice with a specialty in Acute Care Nurse Practitioner from the Medical College of Georgia and with his Master of Science in Nursing with a specialty in Family Nurse Practitioner from Georgia College.


Lawanda Greene is an accomplished 16-year nursing professional with significant experience in nursing education, case management, hospice, pain management, and neonatal and adult care. She received her Doctor of Nursing Practice in Adult -Gerontology Acute Care from Augusta University. She also holds a Master of Science in Nursing in Clinical Nurse Leadership and Master of Public Health. She is passionate about spirituality and its influence on patient outcomes. In her spare time, she enjoys spending time with her family, exercising, and shopping.

Twanna Dumas, RN, BSN, MSN, FNP-C

Twanna is an experienced nurse practitioner with a demonstrated history of working in the healthcare industry for over 15 years. Skilled in patient advocacy, diagnosis, nursing education, and caring for clients of all ages. Advanced healthcare services professional with a Master’s degree focused in Family Practice Nursing.

Pamela Carty, DNP, FNP-C

Pamela is a board-certified nurse practitioner with several years of advanced practice experience in the acute care setting and in the community. She works in collaboration with other healthcare providers in ensuring the overall well-being of patients. She earned her associates and bachelor’s degree nursing at Macon State College. She worked as a registered nurse for several years at the Medical Center of Central Georgia.  During her several years of service as a registered nurse, she returned to school and earned her Master of Nursing degree at South University in Savannah Georgia where she graduated with high honors with a focus in family practice.  She began working in a very busy cardiology practice where she once again, encountered multiple patients with both acute and chronic illnesses. While working full time in cardiology and in multiple hospital and clinic settings, she returned to South University and earned her Doctorate in Nursing Practice where she once again, graduated with High honors. Pam, as many of her peers call her, has many years of advanced practice nursing with a wide range of specialties including but not limited to: vascular surgery, cardiology, acute care, urgent care, and outpatient care.  She enjoys taking care of her patients and has great passion for her work. She is an active member of several professional organizations including the American College of Nurse Practitioners, Sigma Theta Tau Honor Society of Nursing and The International Honor Society of Nursing. Pam enjoys reading, cooking, traveling around the world, and spending time with her family.

Clinical Managers

Chelsea Page, CCMA

Attended Mercer University, studied in Early Childhood Education while cheering as a Mercer Bear! While studying at Mercer she took a job in the medical field as Certified Medical Assistant (CMA). She fell in love with patient care immediately. She has been working in the medical field for ten years. She joined Your Doctor’s Immediate Care in August of 2020. Chelsea is married to her husband Blake and they have two children. She enjoys spending time as a family, Georgia Football Saturdays, and small town living.