Our Staff

Wm. Kellar Winkelmeyer, M.D.

Dr. Winkelmeyer earned his medical degree at the University of Missouri-Columbia. He completed his post-doctoral training at the University of Missouri-Columbia and the Mayo Clinic in Rochester, Minnesota. Dr. Winkelmeyer is board certified in Internal Medicine and Nephrology and has been providing Nephrology care since 1986.

Myra June Watson, D.O.

Dr. Watson earned her medical degree from Kirksville College of Osteopathic Medicine. She completed her residency training in Internal Medicine at Tulsa Regional Medical Center and her Fellowship in Nephrology at the University of Missouri-Columbia. Dr. Watson is board certified in Internal Medicine and Nephrology and has been providing Nephrology care since 2001.

Linh Le, M.D.

Dr. Le earned his medical degree from the University of Texas Medical Branch in Galveston, Texas. He also completed his training in Internal Medicine and Nephrology at the University of Texas Medical Branch. Dr. Le is board certified in Nephrology and has been providing Nephrology care since 2000.

Alexandra Voinescu, M.D.

Dr. Voinescu earned her medical degree from the Iuliu Hatieganu University of Medicine and Pharmacy in Cluj-Napoca, Romania. She completed her training in Internal Medicine and Nephrology at the University of Missouri-Columbia. Dr. Voinescu is board certified in Internal Medicine and Nephrology and has been providing Nephrology care since 2007. Dr. Voinescu currently works with the group on a part-time basis.

Leslie Steckel, FNP-C, CNN-NP

Leslie is a Board Certified Nurse Practitioner with a Master’s Degree in Nursing and been a Nephrology nurse since 2000. She completed her nursing studies at the University of Missouri, Sinclair School of Nursing, Columbia, MO, with a Bachelor of Science in Nursing and received her Master’s Degree at University of Phoenix Master of Science/Family Nurse Practitioner. Leslie is also certified by the Nephrology Nursing Certification Commission as a Certified Nephrology Nurse – Nurse Practitioner (CNN-NP).