Dr. John J. Costa

I’m Dr. John J. Costa, an allergist-immunologist based in Buzzards Bay, Massachusetts, specializing in the diagnosis and treatment of immune system disorders. With over two decades of experience, I provide expert care for conditions such as asthma, respiratory allergies, eczema, immune deficiencies, and food and insect allergies. I earned my medical degree from the Icahn School of Medicine at Mount Sinai, completed my internal medicine residency at Boston University Medical Center, and pursued advanced training in allergy and immunology through a fellowship at the National Institutes of Health Clinical Center. Currently, I am affiliated with multiple hospitals, including Brigham and Women’s Hospital and Signature Healthcare Brockton Hospital, where I focus on delivering personalized, evidence-based treatment to improve patient outcomes. Board-certified in both allergy and immunology and internal medicine, I hold an active medical license in Massachusetts. I accept various insurance plans, including Medicare, Aetna, Blue Cross, and United Healthcare, ensuring accessible, high-quality care for my patients. My approach is centered on providing comprehensive, individualized treatment plans to help patients effectively manage their conditions and improve their quality of life.