Meet Our Team
Sinan Haddad, MD
Board Certified Family Medicine, USCIS Civil Surgeon, Certified DOT Examiner, Certified MRO
Dr. Haddad is a highly skilled and compassionate, board‑certified family physician specializing in both urgent care and primary care medicine. He serves as the leading medical provider at North Georgia Urgent Care and brings over 20 years of experience in urgent care and family medicine, plus an additional 10 years of expertise in aesthetics. During that decade, he also directed and supervised the weight‑loss center.
He holds both MRO (Medical Review Officer) and DOT certifications and is a USCIS‑designated Civil Surgeon, offering immigration physicals to those in need. With extensive experience and training, Dr. Haddad is a trusted healthcare professional dedicated to delivering exceptional care for patients requiring immediate attention. He is equipped to manage a wide range of urgent medical conditions, from minor injuries to acute illnesses.
Committed to staying current with the latest advances in medical science, Dr. Haddad actively participates in continuing education programs and regularly attends professional conferences and seminars. He also enjoys training fellow providers, sharing the knowledge and tools he has acquired to ensure patients receive the best possible care.
Anthony Medina, PA-C
Anthony began his medical career when he joined the Navy in the early 1990s, serving as a combat corpsman during major deployments, including the Gulf War and later in Somalia. Following his initial military service, he spent a decade working in mental health—within both locked inpatient facilities and outpatient programs—supporting diverse populations such as adults with developmental delays and young students with emotional needs.
He later returned to military duty, once again serving as a combat corpsman alongside Marine units during significant operations in the early 2000s. After a military career spanning over a decade, he enrolled in PA school at the University of Washington School of Medicine.
In the Atlanta area, Anthony has practiced medicine for well over a decade. His early roles included a two-year tenure at Premier Immediate Care and a year in the cardiothoracic ICU at Emory Hospital. For most recent years, he has been serving patients at North Georgia Urgent Care.
Away from work, Anthony is a proud father of three adult children. When time allows, he enjoys traveling, physical fitness (including running and weightlifting), cooking, painting, and drawing.
Military Merits and Awards:
Combat Action Ribbon
Joint Meritorious Unit Commendation
Navy Unit Commendation
South West Asian Ribbon with 2 bronze stars
National Defense Ribbon
Fleet Marine Force Ribbon
Good Conduct Ribbon
Armed Forces Expeditionary
Navy and Marine Corps Overseas Service
Kuwait Liberation Ribbon
Kuwait Liberation (Emirates Kuwait)
Tatiana Martinez, PA-C
Tatiana is a board‑certified Physician Assistant who joined North Georgia Urgent Care in 2021. She earned her Bachelor of Science in Biochemistry & Molecular Biology from the University of Georgia before completing her Master of Physician Assistant Studies at Florida International University.
Tatiana thrives in the fast-paced setting of urgent care, where every day brings variety and opportunity. Her hands-on skills are among her favorite aspects of practice—whether performing laceration repairs, injections, or other procedures. She also brings clinical expertise and a compassionate approach when caring for patients of all ages.
In addition to her urgent care responsibilities, Tatiana contributes her expertise to aesthetic medicine as an injector at Medical Aesthetics of Suwanee (MedSpa), where she applies her precision and patient-centered focus to cosmetic treatments.
Outside the clinic, she loves spending time outdoors, traveling, socializing with friends and family, and working on home improvement projects. Tatiana’s well-rounded interests and warm demeanor make her a trusted and approachable provider in our community.