Opal Medical Clinic is Houston's specialized center for midlife medicine and beyond, delivering individualized age management, hormone optimization, and men's and women's health care under the motto “Optimal Aging & Longevity.” Founded in 2007 by Dr. Robert S. Tan, MD — one of the first clinics in Houston to offer hormone replacement therapy and age management strategies — Opal Medical has built nearly two decades of clinical expertise in aging endocrinology, sexual health, and the full spectrum of hormonal conditions that emerge across the midlife years. Dr. Tan is nationally recognized for his work in testosterone medicine: patients and colleagues alike describe him as someone who “essentially wrote the book on men's health and testosterone replacement.” His approach combines deep endocrinological expertise with practical, patient-centered care delivered in a private, unhurried setting. Opal Medical operates by appointment only, reflecting its commitment to personalized, thorough care rather than high-volume throughput. A wellness membership program provides regular follow-ups and ongoing support for patients working toward long-term health optimization goals.

About the Physician

Dr. Robert S. Tan, MD, is a Clinical Professor at the University of Texas and a nationally recognized expert in aging endocrinology, testosterone replacement therapy, and men's health. With more than 27 years of clinical experience, Dr. Tan was among the earliest physicians in the United States to specialize in low testosterone treatment, and he built Opal Medical Clinic in 2007 as one of the first dedicated hormone therapy and age management centers in Houston. His academic background at the University of Texas has kept him at the forefront of research and clinical standards in testosterone medicine, bioidentical hormone replacement, and the intersecting conditions that accompany hormonal decline — memory loss, metabolic dysfunction, sexual health, and musculoskeletal aging. Patients consistently describe Dr. Tan as thorough, patient, knowledgeable, and a great communicator — a physician who listens carefully and explains complex hormonal issues in terms that make practical sense. He brings the same rigor to women's hormonal health, including menopause management, osteoporosis, and female androgen insufficiency.

Services Offered

• Low Testosterone Treatment (TRT) — Opal Medical is one of the earliest centers in the United States specializing in low testosterone conditions, offering innovative and evidence-based TRT protocols for hypogonadism, andropause, and related hormonal deficiencies in men.
• Bioidentical Hormone Replacement Therapy (BHRT) — Customized BHRT programs developed in partnership with area compounding pharmacists, offering natural progesterone, estrogen, DHEA, and other hormones through topical, injectable, and other delivery routes tailored to each patient's individual needs.
• Menopause Treatment — Comprehensive evaluation and individualized treatment of menopause, including hormone-related bone loss (osteoporosis), female androgen insufficiency syndrome, and the full range of symptoms accompanying the menopausal transition.
• Andropause Management — Specialized care for men navigating andropause — the male hormonal aging process — addressing testosterone decline, metabolic changes, sexual dysfunction, fatigue, and mood changes through individualized clinical protocols.
• Erectile Dysfunction Treatment — Evaluation and management of erectile dysfunction within the context of broader hormonal and vascular health, addressing root causes including low testosterone, vascular factors, and hormonal imbalances.
• Executive Physicals — Comprehensive, customized executive health evaluations including advanced bloodwork, body composition analysis, cardiac imaging, DEXA scans, and genetic screening — tailored assessments for high-achieving individuals who need a complete clinical picture of their health status.
• Memory Loss Evaluation & Treatment — Assessment and integrative management of memory loss and cognitive decline with attention to the hormonal, metabolic, and nutritional factors — including testosterone and thyroid status — that research increasingly links to cognitive function.
• Enlarged Prostate (BPH) Management — Clinical evaluation and management of benign prostatic hyperplasia within the context of men's overall hormonal health, ensuring that testosterone therapy and prostate health are managed together with appropriate monitoring.
• Vitamin Injections — Injectable vitamin supplementation including high-dose B12 and concentrated Vitamin D to address deficiencies that commonly contribute to fatigue, immune dysfunction, mood disturbances, and reduced quality of life.
• Wellness Membership Program — An ongoing membership for patients seeking regular follow-ups, monitoring, and support to sustain their health optimization goals over time — providing continuity and accountability beyond individual visits.

What to Expect

Opal Medical Clinic is located at 3311 Richmond Avenue, Suite 205, Houston, TX 77098. Phone: (713) 401-9396. Fax: (713) 490-3543. Email: info@opalmedical.com. Website: opalmedical.com. The practice operates by appointment only — call or email to schedule. Dr. Tan welcomes new patients from Houston and the surrounding region who are seeking expert, personalized care for hormonal health and age management.