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Internal Medicine


An endocrinologist is a specialist who has studied hormonal conditions and knows the best treatment options, even when conventional treatments do not work well. Unlike a family practice doctor or general practitioner, an endocrinologist studies hormones and hormone diseases in depth and specializes in providing patients with the best and latest treatments available for hormone imbalances.

Dr. Anna Ruiz Allison is our Internal Medicine, Endocrinologist and also serves as the Medical Director for Pasadena Health Center (PHC). She received her training in Puerto Rico and is originally from New York. Dr. Allison has completed a fellowship with MD Anderson hospital and has over 30 years of experience.

Common Illnesses Treated

  • Adrenal disorders
  • Osteoporosis
  • Diabetes
  • Endocrine disorders
  • Heart problems
  • Pituitary disorders
  • Thyroid disorders
  • Weight & Metabolism
  • Women’s health issues

Make an Appointment

To schedule a visit with Dr. Ruiz, please call 713-554-1091. For non-urgent inquiries only, you may also Contact Us online.