General Practitioners

• Osteoporosis
• Arthritis
• Medical Weight Loss
  To achieve excellence, we combine our clinical skills with state of the art laboratory tests to obtain an accurate diagnosis of symptomatic hypogonadism or the andropause syndrome. The Opal Medical Clinic in Houston, Texas opened in 2007 and is one of the first expert led Clinic in the country to offer diagnosis and treatment of straightforward or complex low testosterone problems. We have patients coming from the Houston area, and as far as Mexico, Canada, and the Middle East. Besides diagnosis and just offering testosterone treatment, we offer a complete approach and offer wellness examinations. In our programs, we include weight loss, nutritional and exercise counseling. In our weight loss programs, we help calculate calorie requirements for you and give advice on how to regain testosterone naturally. We can also advise on the types of exercises that will help with building up testosterone.
• Family Practice
  Robert S. Tan MD, MBA, AGSF is Founder & Director of the OPAL Medical Clinic. He is board certified in Family Medicine & Geriatric Medicine. He is also certified with the Royal College of Physicians London, Royal Australian College General Practitioners, American College of Physician Executives & American Medical Directors Association. He is a member of the American Association Clinical Endocrinologists and Fellow of the American Geriatrics Society. His academic appointments include Clinical Professor of Family Medicine at the University of Texas and also was Associate Professor of Internal Medicine at Baylor College of Medicine, where he spent many years caring for veterans.  Dr Tan was voted by his peers to be in the prestigious Best Doctors in America for several consecutive years since 2001.
• Emergency Care
• Colonoscopy
  Results of the tests will be communicated to the client in a follow up visit, with suggestions on how to prevent disease and optimize health. Clients can also be referred for colonoscopy screening for colon cancer.
• Erectile Dysfunction
• Electrocardiogram
  This includes a thorough history and physical, body weight and composition analysis, blood work to determine cardio-neurological and cancer risks and EKGs.

Gynecologists

• Endometriosis

Internists

• Internal Medicine
• Colon Cancer
• Prostate Cancer
  The search continues for the ideal androgen for replacement therapy. It should target bone, muscle and the brain specifically, without untoward effects on the prostate or heart. The major goal of androgen substitution is to replace testosterone at levels as close to physiological levels as possible. Testosterone enanthate and testosterone cypionate, (150-200mg ), administered intramuscularly every 1-2 weeks have been the mainstay of testosterone substitution, besides the topicals. A major disadvantage is the strongly fluctuating levels of plasma testosterone, which are not in the physiological range at least 50% of the time. Lower doses given more frequently (50-100mg), administered intramuscularly every 7 days produce more sustained levels, but may be less practical for long-term therapy. These prohormones are converted peripherally to dihydrotestosterone (DHT) and 17beta-estradiol (E2), generating supraphysiological levels. The significance of this is unclear, however, it has been suggested that continuous or repeated supraphysiological levels may increase the risk of prostate cancer. Orally administered testosterone is an acceptable oral alternative in Canada and Europe for some time, but is not yet available in the U.S..

Neurologists

• Multiple Sclerosis
  Rarely penile diseases such as Peyroine’s disease can lead to ED. Stroke, spinal cord disorders, temporal lobe epilepsy, urinary tract symptoms and multiple sclerosis might also lead to erectile dysfunction Central to this is what we call endothelial dysfunction. Further, medications for other common problems could be causative and cannot be neglected as an important contribution to this malady, for example in out-patient clinics around 25% of ED was diagnosed as drug-mediated. Among these drugs, the prime agent is thiazide diuretics followed by beta-blockers. These drugs either reduce blood pressure or act on the smooth muscles of the corpus cavernosa. Other drugs such as benzodiazepines, serotonin inhibitors, cimetidine, digoxin, metoclopramide would also increase ED.
• Epilepsy

Psychiatrists

• Depression
• Anxiety

Endocrinologist

• Diabetes Care
• Endocrinology
  The OPAL Medical Clinic is a specialized center for mid life individuals and beyond. Our motto is for “Optimal Aging & Longevity”.The clinic is directed by Dr Robert S. Tan and is located in Houston, TX, USA. Our expertise is in: Aging Endocrinology & Sexual Health to include...
• Hypothyroidism
  The challenges will be discussed in turn. To begin, one of the greatest challenges for the clinician is whether the “symptoms” of aging can be caused by low testosterone. In many cases, this is so as evidenced by reversal of symptoms with hormonal replacement. In other cases, it is less apparent, especially in the presence of multiple comorbidities. The astute diagnostician should able to decipher between low testosterone symptom complex and conditions such as anemia, depression, hypothyroidism, chronic disease states, side effects of medications and even psychological disorders. The second challenge is the reliability of screening instruments including the ADAM and the AMS. While sensitive, they lack specificity. The third challenge is the issue of whether fertility declines with aging and its relationship with androgens. The fourth challenge is the definition of low testosterone. Depending on whether one uses total, free or bioavailable testosterone, the prevalence differs. In addition, while standardization with laboratory values is desirable to make a diagnosis, could there be existence of relative hypogonadism? The fifth challenge is the choice of blood test. While arguably, the dialysis equilibrium for free testosterone is probably the gold standard, it is not widely available to clinicians. Age and obesity confound testosterone levels through its effects on SHBG. The sixth challenge is that saliva testing for hormones has been contemporary in some areas in the United States but its validity has not been well documented yet. The seventh challenge is that of late, there are propositions for the use of prohormones such as DHEA and even progesterone to slow the aging process. The main issue has been that while it is true that there are studies of association to prove the hypotheses, causal relationships are lacking, particularly in human models. The eight challenge is that of the role of estrogens in men. Undeniably, estrogens are important in men, such as for bone health and possibly the brain; but much is unknown at this point.
• Thyroid

Radiologist

• MRI
  In their examination, they have utilized MRI and PET outputs to identify auxiliary and useful changes in the cerebrum. Changes in neurometabolism noted on PET filtering, give some proof of direct neurological impact of testosterone substitution. It is outstanding that testosterone can impact visual spatial areas in typical patients and it is conceivable that unobtrusive upgrades in visual aptitudes of the present patient were owing to testosterone substitution. This may have significant ramifications for the restoration of some Dementia patients. Testosterone may likewise effectsly affect muscle quality and henceforth portability in fragile patients.
• Computed Tomography

Plastic Surgeons

• Botox
  Many are ignorant that Anti Aging medicines are not constrained to Botox and Facelifts. There are various Clinics progressing in the direction of the advancement of Anti Aging medications making them progressively suitable for generally wellbeing rebuilding. The Opal Medical Clinic in Houston is one spot where you can look for assistance for vanquishing age and reestablishing your general prosperity. These can be a few tests that are sent to break down the physical prosperity of people...

Physical Therapists

• Physical Therapy
  A facility providing therapy and training for rehabilitation. The center may offer occupational therapy, physical therapy, vocational training, and special training such as speech therapy.
• Occupational Therapy
• Geriatrics