Dr. William Norman Hamstra DO Surgeon

Dr. William Hamstra is a surgeon in Livermore, California. He is affiliated with multiple hospitals in the area, including Corona Regional Medical Center and John Muir Medical Center, Walnut Creek. He received his medical degree from Oklahoma State University College of Osteopathic Medicine and has been in practice for 22 years. Dr. Hamstra accepts several types of health insurance, listed below. He is one of 11 doctors at Corona Regional Medical Center and one of 42 at John Muir Medical Center, Walnut Creek who specialize in Surgery.

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Office Location

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Specialty & Clinical Interests

Surgeon: General Surgery, Bariatric, Breast

Education & Medical Training

Riverside Osteopathic Hospital - Henry H Ford
Residency, General Surgery, 1987 - 1991

Oklahoma State University College of Osteopathic Medicine
Class of 1986

Publications & Presentations

The effect of urethane on pituitary-adrenal function of female rats.
Hamstra, W. N., Doray, D., Dunn, J. D.

Insurances Accepted

  • Aetna Choice POS II
  • Aetna HMO
  • BCBS Blue Card PPO
  • BCBS California CaliforniaCare HMO
  • BCBS California PowerSelect HMO
  • BCBS California PPO
  • Blue Shield CA Local Access Plus HMO
  • Blue Shield California HMO
  • Blue Shield California PPO
  • CIGNA HMO
  • CIGNA Open Access
  • CIGNA PPO
  • First Health PPO
  • GHI PPO
  • Great West PPO
  • Health Net California Large Group PPO
  • Humana ChoiceCare Network PPO
  • Multiplan PHCS PPO
  • Multiplan PPO
  • Pacificare HMO
  • United Healthcare - Direct Choice Plus POS
  • United Healthcare - Direct Options PPO
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