LOCAL HEALTHCARE PROVIDERS
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8 providers
Availability last updated 09/26/2025
The Longevity Collective is where wellness meets innovation, empowering adults across Marin County to live vibrantly and age with confidence. Nestled in the heart of Fairfax, California, our practice isn’t just a clinic—it supports your lifestyle. Each treatment is here to revive, destress and reenergize your body and mind.
We have state-of-the-art treatments grounded in science yet driven by our belief that age is just a number. The Longevity Collective team offers a dynamic suite of services: red light therapy, acoustic soundwave therapy, cranial therapy, peptide therapy, concierge medicine and pulsed electromagnetic field (PEMF) therapy. With the effectiveness of our cold plunge tubs followed by an infrared sauna, every visit is an experience of self-renewal tailored to your wellness needs.
Sessions here aren’t just an appointment. We offer new anti-aging and wellness experiences and we won't rush you out. We want to support your wellness goals. Our team will listen to your needs and recommend a plan that is right for you. Whether it’s alleviating pain, restoring energy, rejuvinating your skin, or talking with Dr. David Baldini, every recommendation is designed with one goal: to unlock the energy and vitality of every person who walks through our doors.
Start your journey with The Longevity Collective today—where each of our unique treatments brings you closer to your health goals. Call the office or request a consultation online today.
James Slezak, MD
Surgeon
771 Center Blvd
Fairfax, CA 94930
Dr. Melissa Loja, MD, MAS, FACS, FSVS, RPVI, completed medical school at the University of California at Davis. She went on to be among the first in the nation to complete a specialized integrated vascular surgery residency program at the University of California at Davis. Dr. Loja was selected for the highly competitive NIH funded T32 research grant, which led to widely cited publications. She attained a Master's degree in Clinical and Translational research from these efforts. In addition, she holds a Bachelor's degree in Biologic Sciences, also obtained at the University of California at Davis. Dr. Loja specializes in vascular and endovascular surgery, including carotid artery disease, aneurysm repair, dialysis access, treatment of mesenteric and renal artery disease and lower extremity revascularization. Among her clinical interests, limb salvage and peripheral arterial disease with a multidisciplinary focus is a particular passion of hers. She is expertly trained and highly skilled in endovascular as well as surgical management of peripheral arterial disease.
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Dr. Melissa Loja, MD
Surgeon
2301 Camino Ramon
Suite 290
San Ramon, CA 94583
Burzeen E. Karanjawala, MD, is a colorectal surgeon at Sacramento Colon and Rectal Surgery Medical Group. He sees patients at the Sacramento and Roseville, California, offices.
Dr. Karanjawala obtained a Bachelor of Arts in molecular and cell biology from the University of California, Berkeley. He also earned a Master of Science in physiology and biophysics from Georgetown University in Washington, DC.
Dr. Karanjawala graduated from medical school at New York Medical College in Valhalla, New York. He did his general surgery residency training at the University of Texas Health Science Center in Houston, Texas. He then completed his colon and rectal surgery residency at UT Physicians Colon and Rectal Clinic – Texas Medical Center in Houston, Texas.
Dr. Karanjawala worked for two years at the Lyndon B. Johnson General Hospital in Houston, Texas, first as a clinical instructor and then as an assistant professor.
He is board certified in both general surgery and colon and rectal surgery. Dr. Karanjawala has an interest in a wide variety of colorectal disorders. He is passionate about minimally invasive surgery and robotic surgery. He is also skilled at endoscopy and is keen on the surgical management of inflammatory bowel disease.
2023 Sutter Independent Physicians President’s Award Recipient for Excellence in Patient Care
Burzeen Karanjawala, MD
Colorectal Surgeon
1020 29th Street
Suite 350
Sacramento, CA 95816
Ryan Ched, MD, FACS, is a skilled general surgeon at Sierra Pacific Surgical in Roseville, Dorado Hills, Grass Valley, and Carmichael, California. He provides personalized advanced surgical care to his patients.
Certified by the American Board of Surgery, Dr. Chen has trained in both traditional and minimally invasive surgery techniques. He treats diseases ranging from breast and colon cancer to hernias, anorectal disorders, and gallbladder disease. Dr. Chen’s training prepared him to address various surgical issues and deliver personalized care for every individual.
It has always been Dr. Chen’s passion and goal to be a broad-based general surgeon serving a community in the area he calls home. Dr. Chen has remained dedicated to advancing patient care throughout his dynamic education and career. He has conducted extensive medical research as a research assistant in general surgery, pediatric surgery, radiology (cardiothoracic and breast imaging), and tumor virology. Dr. Chen has also contributed to several peer-reviewed publications and lectured on pre-operative opioid use in Crohn’s patients undergoing elective ileocolic resection.
Dr. Chen attended the University of California in Berkeley, California, where he earned his Bachelor of Arts in molecular and cell biology. He then completed his Doctorate of Medicine at Saint Louis University School of Medicine in Missouri. To further his medical expertise, Dr. Chen completed a demanding general surgery residency at the University of Louisville School of Medicine in Kentucky. In addition to his certification through the American Board of Surgery, he also holds certifications in Advanced Cardiac Life Support and Advanced Trauma Life Support.
Dr. Chen helps improve the health and lives of others, even beyond his medical practice. Through the Tar Wars initiative, he taught tobacco prevention and risk factors to elementary students at St. Louis-area schools. Through Sun Protection Outreach Teaching by Students (SPOTS), Dr. Chen also provided sun protection and skin cancer prevention education to adolescents in the St. Louis-area school district. He also dedicated his time by volunteering at Health Resource Center, a free clinic in North St. Louis, where he helped patients manage their health. Dr. Chen is fluent in both English and Mandarin.
Ryan Chen, MD
Surgeon
3939 J St.
Suite 330
Sacramento, CA 95819
Scott Braley, MD, FACS, is a board-certified general surgeon at Sierra Pacific Surgical, serving patients in Roseville, Dorado Hills, Grass Valley, and Carmichael, California.
Dr. Braley earned his medical degree from Texas Tech University Health Sciences Center in Lubbock. With experience as a medical director and lead general surgeon, Dr. Braley is proud to teach the next generation of medical staff as a professor.
Dr. Braley has held a variety of administrative appointments throughout his medical career, including but not limited to the Chair of the Department of Surgery (2014 – 2017) at Sutter Roseville Medical Center and the President of Access Surgery, Inc. (2013 – 2017). Notably, Dr. Braley has been awarded among Sacramento's top doctors in Sacramento Magazine (2016). He brings this unmatched experience to his patients at Sierra Pacific Surgical.
Dr. Braley is proud to hold several accreditations and licenses, including a certification in Advanced Trauma Life Support and being named a Fellow of the American College of Surgeons. Dr. Braley specializes in robotic surgery, laparoscopic surgery, acute care surgery, and specialized DaVinci Robotic Surgery.
Scott Braley, MD
Surgeon
3939 J St.
Suite 330
Sacramento, CA 95819
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