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Fatima Khan, MD, MBA, is board-certified by The American Board of Allergy and Immunology and the American Board of Internal Medicine. She works with the Allergy, Asthma & Immunology Associates team in Tampa and Brandon, Florida.

Dr. Khan grew up in New Jersey and moved to the Tampa Bay area in 2017. She received her medical degree from the University of Medicine and Health Sciences in New York City, New York, and her Master of Business Administration (MBA) from Columbia Southern University in Orange Beach, Alabama.

After graduating, Dr. Khan completed a dual residency in internal medicine and pediatrics at Newark Beth Israel Medical Center in Newark, New Jersey, while serving as chief resident in her last year. She completed her allergy and immunology fellowship at the Johns Hopkins All Children's Hospital in St. Peterspurgh, Florida, serving as chief fellow during her second year.

Dr. Khan has presented at the American Academy of Allergy, Asthma, and Immunology and the Clinical Immunology Society Annual Meetings.

She specializes in primary immunodeficiency disorders, penicillin drug allergy, asthma, eosinophilic esophagitis, and other immunologic diseases.

Ammar Hatab, MD, is a board-certified allergist and immunologist who has been practicing since 2005. He works with the Allergy, Asthma & Immunology Associates team in Tampa and Brandon, Florida.

Dr. Hatab received his medical degree from the American University of Beirut in Beirut, Lebanon. After graduating, he completed his internal medicine residency and allergy and immunology fellowship at the University of Iowa in Iowa City, Iowa.

Before moving to Tampa to join Allergy, Asthma & Immunology Associates, Dr. Hatab worked in private practice in Southern California and Iowa. His prior experience includes starting a thriving allergy practice, teaching medical students and residents, and participating in more than 20 clinical trials as a principal investigator or sub-investigator.

In addition to delivering state-of-the-art care to patients with allergic rhinitis and asthma, Dr. Hatab has special expertise in treating chronic cough, hives, angioedema (swelling episodes), and immunodeficiency disorders. 

His practice philosophy is to treat every patient with skill, care, and compassion. "I always strive to treat my patients as if I were treating members of my own family,” he said.

Dr. Hatab is a fellow of the American Academy of Allergy, Asthma, and Immunology (FAAAAI), a member of the American College of Allergy, Asthma and Immunology (ACAAI), and other national and international professional organizations.

Colleen Sabella, MD, is a board-certified allergist and immunologist at Allergy, Asthma & Immunology Associates team in Tampa and Brandon, Florida, with specialized training in diagnosing and treating a wide range of allergic and immune-related conditions in both children and adults.

She earned her medical degree from Penn State College of Medicine and completed her pediatric residency at Phoenix Children's Hospital. Dr. Sabella went on to complete a competitive fellowship in Allergy and Immunology at the University at Buffalo.

Before relocating to Tampa, Dr. Sabella practiced at a major academic medical center in Portland, Oregon, where she taught medical students and residents and served as the founder and medical director of the allergy clinic at the Portland Veterans Affairs Medical Center.

Dr. Sabella brings a patient-centered approach to the Allergy, Asthma, and Immunology Associates of Tampa Bay, with clinical interests, including food allergies, eczema, asthma, chronic hives (urticaria), angioedema, and drug allergies. She is passionate about improving the quality of life for her patients through personalized care plans and long-term disease management.

Originally from Erie, Pennsylvania, Dr. Sabella enjoys spending time outdoors with her husband and two sons, especially hiking and visiting the beach. She is also a proud supporter of the Penn State Nittany Lions.

Lori Davila, APRN, FNP-C, is a certified family nurse practitioner by the American Academy of Nurse Practitioners. She works with the Allergy, Asthma & Immunology Associates team in Tampa and Brandon, Florida.

Lori graduated from the University of South Florida in Tampa, Florida, with a Master of Science in Nursing in 2015. In her graduate program, she had diverse clinical experiences, including the Allergy/Immunology Clinic at the University of South Florida, John Hopkins All Children's Hospital in St. Petersburg, Florida, urgent care, and pediatric emergency care. 

Lori has years of experience as a registered nurse in the hospital setting. Since 2015, she has focused on treating patients with allergic diseases. She has been a sub-investigator in clinical research on chronic cough and food allergies. 

Lori also has extensive experience in nursing education and holds faculty positions at St. Petersburg College and Galen College of Nursing, both in St. Petersburg, Florida. She maintains membership in the American Association of Nurse Practitioners and the Sigma Theta Tau International Society of Nursing.

Lori is passionate about patient education and strives to ensure patients understand their diagnosis and treatment options to improve their quality of life.