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Endocrine Calcium Clinic

The Endocrine Calcium Clinic helps streamline the evaluation and treatment of problems associated with calcium disorders and mineral abnormalities.

Based in the Department of Endocrinology, the Calcium Clinic provides access to a multidisciplinary team of experts who specialize in treating a vast number of common and rare calcium disorders, offering DXA bone density scanning, an on-site laboratory to test for calcium and bone diseases, and an infusion center for administering medications.

The Endocrine Calcium Clinic addresses problems associated with the regulation of the body's bone, mineral and hormone functions. Important minerals like calcium, phosphorus and magnesium are critical for the body’s normal functioning, and are often taken for granted as a part of everyday activities. Too much or too little of these minerals can be detrimental to the body’s ability to function properly, and can lead to other serious problems or complications.

Common problems associated with calcium disorders include vitamin D deficiency, intestinal disorders, kidney stones, osteoporosis and parathyroid disorders such as hyperparathyroidism. Additionally, metabolic abnormalities associated with obesity, bariatric surgery and organ transplantation are diagnosed and treated. Download our Parathyroid and Calcium Disorders Guide to learn more.

Cleveland Clinic’s endocrinology services are ranked No. 3 in the nation by U.S.News & World Report. The Calcium Clinic consists of a team of experts that specialize in the treatment of a number of common and rare calcium disorders, as well as a unique focus on bone and mineral regulation problems associated with the surgical treatment of obesity. Ancillary facilities allow our experts to perform specialized testing not found in most medical centers, and patients are provided access to therapies using the latest forms of oral and injectable medications for many bone diseases.

Our Endocrine Calcium Clinic team is committed to providing patients the best diagnostic and therapeutic services. Links to detailed information about each physician is provided below:

Dr. Angelo Licata

Consultant Director, Endocrinologist

Dr. Angelo Licata is an endocrinologist and Consultant Director of the Cleveland Clinic Endocrine Calcium Clinic. A graduate of the University of Rochester, he completed his residencies in Internal Medicine at Washington University Hospital, as well as Georgetown University Hospital, and a fellowship in Endocrinology, Diabetes and Metabolism at the National Institute of Health. He is an expert on osteoporosis, calcium deficiencies, and bone and metabolic disorders.

Dr. Leila Khan


Dr. Leila Khan is a specialist in the Endocrine Calcium Clinic, and a staff physician in the Endocrinology & Metabolism Institute. She is board certified in Internal Medicine and Endocrinology, Diabetes & Metabolism. She graduated from medical school in 2004 from the University of Maryland, completed internal medicine residency and chief residency at Hershey Medical Center, and went on to complete her fellowship in endocrinology at the University of Pittsburgh. Dr. Khan’s specialty interests include diabetes, thyroid nodules and disorders, hypercalcemia, osteopenia, parathyroid and calcium disorders and vitamin D deficiency.

Dr. Susan Williams

Internist, Nutrition
& Bariatric Bone Disease Expert

Dr. Susan Williams is an internist in the Endocrine Calcium Clinic, and a staff physician in the Medicine Institute. She is board-certified in internal medicine, nutrition, nutrition support and bone densitometry. Dr. Williams obtained her undergraduate degree in education from Kansas State University, has a master’s degree from the University of Rhode Island in human and clinical nutrition; completed the U.S. Air Force internship in clinical nutrition, and served as an officer, nutrition professional and reservist in the U.S. Air Force. She later went on to attend medical school at the Wright State University School of Medicine, residency in the Kettering Medical Center Network and a fellowship in clinical nutrition and metabolism at the Cleveland Clinic. Dr. William’s specialty interests include bone and mineral metabolism, metabolic bone disease, calcium disorders, malabsorption and malnutrition in adults, and bariatric medicine.

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Call us for an Appointment

  • To find an endocrinologist or diabetes specialists for your needs, contact the Endocrinology & Metabolism Institute at 216.444.6568 (or toll-free 1.800.223.2273, ext. 46568).
  • To find a bariatric surgeon, contact the Bariatric and Metabolic Institute at 800.339.9829.

Same-day Appointments

To arrange a same-day visit, call 216.444.CARE (216.444.2273).