Larry Thiesen, MD

Dr. Thiesen is a board-certified medical doctor, licensed to serve in both Massachusetts and Rhode Island, with a passion for helping patients achieve optimal health and wellness. With advanced training in endocrinology and anti-aging medicine, Dr. Thiesen has extensive experience in diagnosing and treating hormonal imbalances, metabolic disorders, and age-related conditions.

Dr. Thiesen’s expertise in bioidentical hormone replacement therapy (BHRT) and peptide therapy allows him to provide personalized treatment plans that address each patient's unique needs and health goals at our modern clinics in New England. Dr. Thiesen is committed to staying up-to-date on the latest research and advances in peptide therapy, ensuring his patients receive the most safe and effective treatments available.

Dr. Thiesen’s compassionate and patient-centric approach to care emphasizes education, empowerment, and collaboration. By working closely with each patient to understand their individual needs and concerns, Dr. Thiesen helps patients achieve optimal health and wellness to enjoy a higher quality of life.

AAMG Medicine
Human Optimization
Seeds Scientific
Seeds Scientific


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Education & Training

Dr. Thiesen, renowned in cardiothoracic anesthesiology for over three decades, is devoted to the preoperative, intraoperative, and postoperative care of patients undergoing cardiothoracic surgery and related procedures. After completing a fellowship program at the esteemed Cleveland Clinic Foundation, he achieved board certifications in anesthesiology and perioperative transesophageal echocardiography. Dr. Thiesen's distinguished career features an associate professorship at Brown University, establishing the Southcoast Cardiac Anesthesia group in 2002, and heading the cardiac anesthesia department at Charlton Memorial Hospital.



of medical experience in the field of cardiac anesthesia



long-term relationships built on trust and proven results



performed, ranging from BHRT to hair regrowth, sexual wellness, and aesthetic injections



In anti-aging, ranging from BHRT to peptide therapies and aesthetic injectables


Dr. Larry Thiesen has achieved multiple certifications over his career, including:

  • Advanced Bioidentical Hormone Replacement Therapy certification from the Academy of Preventive and Innovative Medicine
  • Hormonal Health certification from the Hormonal Health Institute
  • Advanced training and certification in intravenous therapy from the International IV Nutritional Therapy

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95 Sockanosset Cross Road Suite 209

Cranston, RI 02920

Call: 401-900-5939

Trusted, Proven

Dr. Thiesen and his staff are absolutely amazing!! Dr. Thiesen is extremely knowledgeable, caring and his staff is very helpful, responsive, courteous and professional. As a patient of Dr. Thiesen, I have elected to take a peptide , CJC and have lost lbs and built up my muscle. My work outs are amazing now! I feel amazing, my skin texture and elasticity has improved so much that I'm in disbelief when I look in the mirror. Dr. Thiesen has also put me on BHRT and that has also improved my laundry list of mesopause symptoms I was having. I highly recommend Dr. Thiesen for all you need because he comes up with creative treatment plans and he's willing to try new approaches that are safe and proactive. We just love love love him and his team!

Anonymous Office Visit

I haven't felt this good since I was in my twenties! I can't thank you enough Dr. Thiesen! You are truly the best of the best! I am so grateful for you and your team who have helped me on my path to feeling healthy and happy again!

Anonymous Office Visit

I was so happy that I was referred to Dr. Thiesen. I sent a case of wine to who referred me because she is an angle for sending me to you!! You have changed my life in so many ways! I can sleep again, and I am so sharp again! I think straight , I'm on my A-Game again! I was almost talked into ADHD meds years ago and I am so glad I met you when I did! You have made me a better person and I can't thank you enough for this!

Anonymous Office Visit

Dr. Thiesen gave me the Genuis RF treatment, and I look 10 years younger!

Anonymous Office Visit

It was refreshing to find someone like Dr. Thiesen and his team here on the East Coast , so open and collaborative to customize a treatment plan tailored for me and my needs!

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*Individual results are not guaranteed and may vary from person to person. Images may contain models. MEDICAL DISCLAIMER: The information on this site is for informational and educational purposes only, does not constitute medical advice, and does not establish any kind of patient-client relationship by the use of this website.