About
Dr. Lynne B. Ahn brings more than 30 years of medical experience to her Wellesley practice. A. in Biology with a minor in Physical Fitness and Health Management from the University of California San Diego. She then completed her medical degree at The George Washington University School of Medicine, followed by an internship at Oakland Naval Hospital. Her residency in Internal Medicine took place at the University of California San Francisco.
After residency, Dr. Ahn served as a Navy physician for four years. She taught medical students and residents at David Grant Medical Center and Camp Pendleton Naval Hospital. She cared for active duty service members and their families and received an honorable discharge in 2001 with the rank of Lieutenant Commander. She then completed a Fellowship in Gastroenterology at Boston Medical Center and a two-year Fellowship in Anti-Aging and Regenerative Medicine through the American Academy of Anti-Aging and Regenerative Medicine, with a sub-specialty focus in bioidentical hormone therapy and primary disease prevention. She holds board certification in Gastroenterology from the American Board of Internal Medicine and board certification in Anti-Aging and Regenerative Medicine (ABAARM). Dr. Ahn is passionate about the gut-brain connection, hormone optimization, microbiome assessment, genomics, and longevity medicine. Outside of medicine, she runs, paddle-boards, snowboards, practices yoga, and walks her two black labs. She completed the Boston Marathon in 2014. Boston Magazine named her a Top Doctor four consecutive years from 2022 through 2025, and Castle Connolly recognized her as a Top Doctor in 2025.
Education & Training
Undergraduate
B.A. in Biology (minor in Physical Fitness and Health Management), University of California San Diego
Medical School
MD, The George Washington University School of Medicine
Residency
Residency in Internal Medicine, University of California San Francisco
Fellowship
Fellowship in Gastroenterology, Boston Medical Center; Fellowship in Anti-Aging and Regenerative Medicine, American Academy of Anti-Aging and Regenerative Medicine
Additional Training
Internship, Oakland Naval Hospital
Certifications
Conditions Treated
Who is Dr. Ahn right for?
Dr. Ahn works well with adults who want to address health proactively rather than reactively. Patients managing hormone imbalances, thyroid disorders, or metabolic concerns benefit from her integrative approach. She is a strong fit for women navigating perimenopause or menopause seeking bioidentical hormone therapy. Patients with gastrointestinal concerns, from routine screenings to complex digestive issues, fit naturally within her practice. Those interested in longevity medicine, nutritional optimization, or aesthetic treatments also find her clinical range well-suited to their needs.
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Frequently Asked Questions
Dr. Ahn treats a broad range of conditions spanning gastroenterology, hormone health, and metabolic medicine. Her clinical scope includes hormone imbalances in women and men, thyroid disorders, adrenal insufficiency, vitamin deficiencies, sleep disorders, sexual dysfunction, and gastrointestinal conditions. She also addresses medical weight loss, stress management, and skin health through her aesthetics services.
Yes. Dr. Ahn holds board certification in Gastroenterology from the American Board of Internal Medicine and board certification in Anti-Aging and Regenerative Medicine from the American Board of Anti-Aging and Regenerative Medicine. She also carries the FAARM designation from the American Academy of Anti-Aging and Regenerative Medicine.
Dr. Ahn completed her medical degree at The George Washington University School of Medicine. She trained in Internal Medicine at the University of California San Francisco and completed her gastroenterology fellowship at Boston Medical Center. She also completed a two-year fellowship in Anti-Aging and Regenerative Medicine through the American Academy of Anti-Aging and Regenerative Medicine.
Dr. Ahn reviews each patient's full health history, metabolic profile, lifestyle, and genetics before recommending a treatment path. She focuses on optimizing health before illness develops. Her integrative approach combines gastroenterology, hormone therapy, functional medicine, and preventive care within a single practice.
Yes. Dr. Ahn performs endoscopy, colonoscopy, and hemorrhoid banding as part of her gastroenterology work. She also administers IV therapy, including NAD+ IV infusions, and offers a full aesthetics menu that includes Botox, Dysport, dermal fillers, Sculptra, Skinvive, and Emsculpt.
Dr. Ahn offers hormone therapy for both women and men. For women, she provides bioidentical hormone replacement therapy, estrogen patches, and compounded creams. For men, she provides testosterone therapy and human growth hormone therapy. Her fellowship training included a sub-specialty focus in bioidentical hormone therapy and primary disease prevention.
Yes. Boston Magazine named Dr. Ahn a Top Doctor in 2022, 2023, 2024, and 2025. Castle Connolly recognized her as a Top Doctor in 2025 as well. She brings more than 30 years of medical experience to her Wellesley practice.
Yes. After her Internal Medicine residency at UCSF, Dr. Ahn served as a Navy physician for four years. She taught medical students and residents at David Grant Medical Center and Camp Pendleton Naval Hospital. She received an honorable discharge in 2001 with the rank of Lieutenant Commander.
Doctor profile last updated March 21, 2026