4765 Carmel Mountain Road, Ste 207B
San Diego, CA 92130
Dr. James Fontaine is a board-certified physician in San Diego specializing in evidence-based longevity medicine, bioidentical hormone optimization, and advanced cardiovascular disease prevention. Based in the Torrey Hills community of Carmel Valley, Dr. Fontaine brings more than three decades of clinical experience to help patients extend both lifespan and healthspan with strength, vitality, and purpose.
A graduate of the University of Southern California’s Keck School of Medicine, Dr. Fontaine has dedicated his practice to preventive medicine. He believes in focusing on the early detection and reversal of cardiometabolic dysfunction and the strategic use of hormones to optimize long-term health. His practice is grounded in a simple but uncompromising philosophy: “if it isn’t measured, it isn’t managed.” Every patient’s care begins with advanced diagnostic including comprehensive cardiometabolic panels, precision hormone analysis, CIMT carotid scanning with plaque characterization, and state-of-the-art cardiovascular imaging as indicated. This proven process allows him to identify disease before symptoms arise and tailor interventions with accuracy.
Dr. Fontaine’s approach goes far beyond traditional hormone clinics or med-spa models. He blends the most effective principles of traditional, functional, and lifestyle medicine to uncover and treat the root causes of chronic disease. His precision-based hormone therapy is designed to enhance vitality, metabolic resilience, cognitive performance, and long-term longevity with treatment plans based on data and the scientific literature.
Known for his deep expertise and personalized patient partnerships, Dr. Fontaine works with individuals who are committed to proactive health and elite-level prevention. His mission is unwavering: to help every patient align their healthspan with their lifespan and thus live longer, stronger, and with exceptional quality of life.
A Southern California native, Dr. Fontaine enjoys a wide variety of outdoor sports and loves exploring the US on his motorcycles, including riding “2 up” with his wife, Julie.
Each men’s health service is aimed at improving and enhancing sexual health using noninvasive techniques that increase wellness.
Our aesthetic treatments are aimed at enhancing features and improving lives by helping with unwanted weight gain, reducing fine lines, and more.
Each health and wellness service intends to help you age in a healthy way with preventive screenings, hormone treatments, and nutrition assistance.
We offer multiple services to address symptoms of poor blood flow, low libido, and more.
There's no need to struggle with excess weight alone. We can help.
Rejuvenate your skin and regain a youthful appearance through our state of the art technology and services.
When I came to Dr. Fontaine several years ago, I was going into early menopause and experiencing so many symptoms. Hot flashes, fatigue, pain, brain fog, and depression that were being dismissed by my regular doctors. Dr. Fontaine was truly a godsend. He listened, took my concerns seriously, and helped me create a plan that worked for my body. Over time, we adjusted my medication, and I now feel 100% better. I’m so grateful for his care and support!
Louise initially treated me with Botox at an MD clinic I had been using for years. I was so pleased with my results, when she moved to Fontaine MD I followed her even though it was much farther away. Recently, I decided to also get fillers and expressed to her my desire for a very natural and youthful look, and she nailed it! She is a licensed RN with an Art degree therefore she really understands the anatomy and symmetry of the face. She is welcoming, professional, never rushes and very skilled at injecting both Botox and fillers, I highly recommend Louise!I also highly recommend Fontaine MD, great Doctor, and staff in a lovely, serene setting. They were instrumental in aiding me in a 20+ lb weight loss (so easy) and I could not be more grateful. I feel and look so much better and have maintained my new weight. That is not easy for many 60-year-old females.
Louise is absolutely wonderful to work with! I have seen her for both an IPL facial and Botox (my very first time!). She took the time to answer my questions, address my concerns, and put my mind at ease. I could sense that I was in the hands of someone who was going to take care of me. Louise cares about her clients and their desired outcomes. I have done IPL facials in the past with other providers and the procedures felt very harsh on my skin. With Louise, my skin was not red, bumpy, or painful after and my sunspots were treated effectively! I also trusted Louise with my first Botox experience. Louise made me feel both comfortable and excited about the natural but effective results I was hoping to have! I am thankful I found Louise and will be a returning client!
Louise listened to my skin concerns, made recommendations and completed Botox and filler procedures that that made an amazing difference!
Before seeing Dr. Fontaine, I had no idea I could feel better. I just assumed that as I got older, low energy, hormonal struggles, and general decline were just part of life—something I had to accept. Looking back, I realize how much I had normalized feeling exhausted, unmotivated, and off-balance. My energy had dipped, my sleep was inconsistent, and no matter what I did, things like weight gain and mood swings seemed unavoidable. I wasn’t in crisis—I just wasn’t thriving. Dr. Fontaine completely changed that. From the first appointment, he took the time to listen, evaluate my symptoms, and explain what was really happening in my body. Seeing my lab results was an eye-opener—I finally had real data that explained why I felt the way I did. Within a couple of months of starting treatment, I started feeling like myself again. My energy improved, my focus sharpened, and I finally started sleeping through the night. Over time, the changes were undeniable—I was stronger, my mood was steady, and I didn’t feel like I was constantly fighting against my own body. Dr. Fontaine has been with me every step of the way, adjusting my treatment as needed and making sure I feel my best. He’s thorough, knowledgeable, and truly invested in his patients' well-being. I never feel rushed in my appointments, and he always takes the time to answer my questions. I didn’t realize how much I was missing out on until I started feeling this good again. Now, I feel like I’ve regained the energy, confidence, and vitality I thought were long gone. I’m beyond grateful to Dr. Fontaine for helping me.
112
Total Reviews
4.9
Average Rating
4765 Carmel Mountain Road, Ste 207B
San Diego, CA 92130
Mon - Thu: 8:30am - 5:00pm
Fri: 8:30am - 2:00pm