Dr. Megan HennessayDO

Dr. Hennessay treats a wide range of adult conditions. These include hypothyroidism, PCOS, hypertension, diabetes, hyperlipidemia, obesity, sleep apnea, and autoimmune conditions such as rheumatoid arthritis and lupus. She also addresses behavioral health concerns including anxiety, depression, ADHD, insomnia, and grief reactions. Additional conditions she manages include gout, hepatitis, tuberculosis, sexually transmitted infections, and TMJ dysfunction.

Yes. Dr. Hennessay holds board certification in Family Medicine. She earned her Doctor of Osteopathic Medicine degree and built her clinical foundation at Kaiser and other large health systems before founding her own practice.

Dr. Hennessay practices what she calls Personalized Primary Care. She blends traditional and holistic medicine to address the full picture of a patient's health. She prioritizes disease prevention, long-term wellness, and a direct relationship with each patient. Every visit goes to Dr. Hennessay directly, with no handoffs to a nurse practitioner or physician assistant.

Yes. Dr. Hennessay supervises a medical GLP-1 weight management program using semaglutide and tirzepatide. She approaches weight management as a chronic medical condition and includes comprehensive metabolic oversight. The program provides direct physician access throughout treatment.

Yes. Dr. Hennessay addresses anxiety, depression, stress, grief reactions, insomnia, and ADHD. For patients with an existing ADHD diagnosis from a psychiatrist, she evaluates medication refills on a case-by-case basis. Controlled medications require an in-person evaluation before she prescribes them.

Yes. Dr. Hennessay offers video visits for appropriate clinical situations. These work well for establishing care, certain medication refills, and follow-up consultations. All video visits go through a pre-screening process to confirm they are clinically suitable for a virtual format.

Yes. Dr. Hennessay performs cosmetic procedures through affiliated Hennessay Aesthetics. Services include Jeuveau, Tetra CoolPeel CO2 laser skin resurfacing, chemical peels, microneedling, and hyaluronic acid injectables. These services are available to both members and non-members.

Dr. Hennessay holds admitting privileges at Torrance Memorial Hospital and Providence Little Company of Mary. These affiliations allow her to coordinate hospital care and communicate directly with specialists and surgical teams when her patients need inpatient services.

Yes. Dr. Hennessay offers an Annual Executive Physical and Performance Longevity Assessment. The assessment includes advanced laboratory analysis, hormone evaluation, cardiovascular screening, body composition assessment via coordinated BodySpec DEXA scan, and cancer risk evaluation using the Galleri Multi-Cancer Early Detection Test as an add-on. A dedicated follow-up video visit is included.

Yes. Dr. Hennessay conducts visits in both English and Spanish. Hennessay Medical also maintains a Spanish-language version of its website for Spanish-speaking patients.