Dr. William Greg Siefert

Medical Doctor

Welcome to the website of Dr. William Siefert, a highly skilled and patient-centered healthcare professional with extensive experience in evaluating and treating patients in both private practice and hospital environments. Dr. Siefert has over 35 years of experience in anesthesia administration, pain management, and hearing loss. He is an expert in clinical practices and has led the adaptation of performance measurement and value-based payment systems to align with 21st century healthcare trends.

Throughout his career, Dr. Siefert has provided exemplary organizational and administrative leadership, improving cost effectiveness and quality of care. He possesses sophisticated team management skills, delegating duties within multi-professional care teams. Dr. Siefert is also known for his dedication to patient education, ensuring that patients are well-prepared for procedures and tests and helping them establish the necessary lifestyle changes to improve their health.

In his free time, Dr. Siefert enjoys staying active and healthy through cycling and hiking. He is committed to helping others achieve their health and wellness goals and hopes that his website will serve as a helpful resource to all those who visit. Thank you for stopping by!

Professional Credentials

Certifications / Licenses

  • Diplomate American Board of Anesthesiology, 1987

  • ABA subspecialty certification- Pain Management, 1998

  • American Board of Pain Medicine, 1998

  • Licensure Ohio, New York, Kentucky,

education background

  • M.D. from Ohio State University, Columbus, Ohio, conferred on 03/16/1979
  • B.A. in Chemistry, Magna Cum Laude from Miami University, Oxford, Ohio, conferred on 06/08/1975
  • Postgraduate Training:
  • Pain Management Fellowship at University of New Mexico, Albuquerque, NM from 10/2005-10/2006
  • Residency in Anesthesiology at Ohio State University Hospitals, Columbus, Ohio from 07/1981-06/1983
  • Residency in Ophthalmology (partial) at Duke University, Durham, North Carolina from 01/1980-10/1980
  • Internship at Mount Carmel Medical Center, Columbus, Ohio from 01/1979-12/1979

Professional Experience

  • Orthopedic Institute – Paducah , KY – locums

  • Injury-Care – Erlanger OH,  Bowling Green, KY and Lexington, KY

  • Locum Tenens – Pain Management and Anesthesia

  • Genesis HealthCare, Pain Management   Zanesville, OH

  • Anesthesia Locum Tenens after Pain Fellowship

  • Pain Management Fellowship  UNM

  • Deaconess Hospital, Evansville, Indiana

  • Anesthesia and Pain Management Services – Locum Tenens

  • Arizona Anesthesia, Phoenix, Arizona.  Independent Practice in Anesthesia and Pain Management

  • University of Colorado, Pain Treatment Center, Denver, Colorado.  Assistant Clinical Professor in Pain Management

  • Anesthesia Services.  Denver Health Center, Denver, CO

Connect with Dr. William Greg Siefert

Dr. W.L. Gregory Siefert is a highly experienced healthcare professional with extensive training and certifications in anesthesiology and pain management. With a career spanning over three decades, Dr. Siefert has held various positions in private practice, hospitals, and pain treatment centers across the United States. He is a diplomate of the American Board of Anesthesiology and holds subspecialty certification in pain management from the same board, as well as certification from the American Board of Pain Medicine. Dr. Siefert’s professional expertise and commitment to patient-centered care have resulted in an impeccable track record of zero intraoperative fatalities or malpractice suits related to pain medicine practice.


Monday - Friday: 9:00-5:30

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Dayton, OH