About
Merlene Horan, MD, brings more than 20 years of Family Medicine experience to her role as medical director at Signature by MedStar Health. She focuses on building genuine doctor-patient relationships through personalized, comprehensive, and accessible care. Dr. Horan studies each patient's personal and family history to design individualized care plans that fit their specific health needs.
Before joining Signature by MedStar Health, Dr. Horan served as a decorated Navy officer, a White House Physician, and Physician to the First Lady. She delivered care domestically and internationally to the President, Vice President, First Lady, Second Lady, their families, and cabinet members. That experience gave her a deep understanding of the health challenges facing people with demanding schedules and high-pressure responsibilities. She held top secret and White House security clearances throughout her service, and she brings that same commitment to privacy and confidentiality to every patient relationship today.
Who is Dr. Horan right for?
Dr. Horan is a strong fit for executives and professionals with demanding schedules who need responsive, highly personalized care. Patients who value privacy and a physician who takes detailed personal and family history into account will feel at home here. Her background serving senior government officials gives her a clear understanding of high-pressure lifestyles and their health implications. Adults seeking comprehensive primary care with direct physician access and same-day availability are well served by her practice.
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Frequently Asked Questions
Dr. Horan specializes in executive health and family medicine. She designs individualized care plans based on each patient's personal and family history. Her focus is on comprehensive, accessible, relationship-driven primary care.
Dr. Horan brings more than 20 years of family medicine experience to her role as medical director at Signature by MedStar Health. She has cared for patients across a wide range of health needs, from preventive wellness to complex chronic conditions.
Dr. Horan served as a decorated Navy officer and as a White House Physician, including as Physician to the First Lady. She delivered care to the President, Vice President, First Lady, Second Lady, their families, and cabinet members, both domestically and internationally. That experience sharpened her understanding of the health needs of high-performing individuals.
Dr. Horan builds each care plan around the individual patient's personal and family history. She prioritizes genuine doctor-patient relationships and takes a personalized, comprehensive approach to every visit. Her goal is care that fits each patient's specific health needs and life circumstances.
Yes. Dr. Horan held top secret and White House security clearances throughout her military and executive service. She applies that same standard of confidentiality to every patient relationship at Signature by MedStar Health.
Yes. Members at Signature by MedStar Health reach Dr. Horan and her care team directly, 24 hours a day, seven days a week. A dedicated care navigator also assists with scheduling and coordination at any time.
Yes. Dr. Horan and her team arrange same-day visits for urgent needs. The practice prioritizes timely access so members do not face long waits when health concerns arise.
Dr. Horan works with executives, professionals, and adults who need highly personalized primary care. Her background serving senior government officials makes her particularly effective with patients navigating high-pressure responsibilities and demanding travel schedules.
Doctor profile last updated March 21, 2026