American Shared Hospital Services
Two Embarcadero Center, Suite 410
San Francisco, CA 94111

Tel: 415-788-5300 or 800-735-0641
Fax: 415-788-5660

Click for information about Board Governance.

Our Executive Officers and Board of Directors have over 100 years of healthcare experience.

Executive Officers

Ernest A. Bates, M.D.

ERNEST A. BATES, M.D., founder of the Company, has served as Chairman of the Board and Chief Executive Officer since the Company's incorporation. A board-certified neurosurgeon, he is currently Emeritus Vice Chairman of the Board of Trustees of The Johns Hopkins University and serves on the Board of Visitors of the Johns Hopkins Medical Center and the Johns Hopkins Neurosurgery Advisory Board. He serves on the boards of the University of Rochester, FasterCures, Shared Imaging, LLC and the Salzburg Global Seminar. Dr. Bates was appointed to the California Commission for Jobs and Economic Growth and the Magistrate Judge Merit Selection Panel. From 1981-1987 he was a member of the Board of Governors of the California Community Colleges, and he served on the California High Speed Rail Authority from 1997 to 2003. Dr. Bates is a member of the Board of Overseers at the University of California, San Francisco, School of Nursing. He is a member of the Milken Institutes. He is a graduate of the School of Arts and Sciences of Johns Hopkins University and the University of Rochester School of Medicine and Dentistry. Dr. Bates is the father of former Board Member and current Company Vice President of Sales and Business Development, Ernest R. Bates.

Craig K. Tagawa

Mr. Tagawa joined American Shared in 1988 and has served as its Chief Operating Officer since 1999 and Chief Financial Officer since 1992. Additionally, he is GK Financing's Chief Executive Officer. Mr. Tagawa is the former Chair of the Industrial Policy Advisory Committee of the Engineering Research Center for Computer-Integrated Surgical Systems and Technology at The Johns Hopkins University. He received an undergraduate degree from the University of California at Berkeley and an MBA from Cornell University.

Ernest R. Bates

Mr. Bates, Vice President of Sales and Business Development since January 2007, previously served as an American Shared Director from 2004 until January 2007. He was Managing Director, Institutional Fixed Income Sales of HSBC Securities (USA) Inc. from 2003 to 2006 and was Managing Director, Head of Asian Product for HSBC from 1999 to 2003. From 1993 through 1999, Mr. Bates held various positions with Merrill Lynch, last serving as Vice President, European Syndicate for Merrill Lynch International. He received his undergraduate degree from Brown University and an MBA from The Wharton Business School, and is the son of Founder Dr. Ernest A. Bates.

Company Officers

Willie R. Barnes

Mr. Barnes is Corporate Secretary for American Shared and served as a Director from 1984 to 2004. He is currently a Partner of Musick, Peeler & Garrett LLP. Formerly he was a Senior Partner of Manatt, Phelps, Rothenberg & Phillips. From 1975 to 1979, he served as Commissioner of Corporations, the state regulatory agency responsible for administering laws regulating specified financial institutions, including credit unions, industrial loan companies, consumer finance lenders, and commercial finance lenders, the California Corporate Securities Law and the Franchise Investment Law. He was a Director of Franchise Finance Corporation of America from 1994 to 2001 and a Director of Spirit Finance Corporation from 2003 to 2007 and chaired its Nominating and Governance Committee. Mr. Barnes received a Bachelor of Arts degree from the University of California in 1953 and a law degree from the UCLA Law School in 1959.

Board of Directors

Ernest A. Bates, M.D.


Daniel G. Kelly, Jr.
DANIEL G. KELLY, JR., is a newly elected member of the Board of Directors. Mr. Kelly was a partner of Davis Polk &Wardwell LLP, an international law firm, from 1999 to 2015, co-founding its Silicon Valley office in 1999. During his time at Davis Polk, Mr. Kelly had an extensive corporate practice representing companies, private equity funds and financial institutions in a broad array of complex transactions, and also acted as a senior advisor to boards and special committees on numerous sensitive matters. Prior to joining Davis Polk, Mr. Kelly was a senior officer of a major investment banking firm, the chief legal officer of an NYSE-listed corporation and a partner involved in management of two other law firms. Mr. Kelly received his B.A. in History from Yale University and his J.D. from Columbia University School of Law.

David A. Larson, M.D.

DAVID A. LARSON, M.D., PhD, FACR, FASTRO, is a newly elected member of the Board of Directors. He is an internationally recognized authority on brain tumors and on central nervous system and body radiosurgery, intensity modified radiotherapy, and highly conformal radiotherapy. He holds a PhD degree in high energy physics from the University of Chicago and an MD degree from the University of Miami School of Medicine. He completed his medical internship at the University of California, San Francisco and his radiation oncology residency training at Harvard Medical School, where he also served as attending physician and instructor. Dr. Larson has been a member of the UCSF academic faculty since 1986, leading to joint professorial appointments in the Departments of Radiation Oncology and Neurosurgery. He has authored more than 200 scientific papers, reviews, and book chapters. He was elected by his peers to the presidency of numerous professional societies, including the American Society for Therapeutic Radiology and Oncology (ASTRO), the Northern California Radiation Oncology Society (NCROS), and the International Stereotactic Radiosurgery Society (ISRS). He is a Fellow in the American College of Radiation Oncolgy (FACRO), the American College of Radiology (FACR), and the American Society for Therapeutic Radiology and Oncology (FASTRO). He has been recognized as one of America's top doctors every year since 1991.

S. Mert Ozyurek

S. MERT OZYUREK is a newly elected member of the Board of Directors. He is currently the President of Ozyurek A.S., the preferred supplier of Elekta Gamma Knife systems to hospitals in Turkey, and EMKA, LLC in the United States. Prior to that, he served as Vice President in Ozyurek A.S., overseeing international business and business development. He joined Ozyurek A.S., the family business, and served as a Sales Manager for nine years, after completing military service in the Turkish Air Force. Mr. Ozyurek founded a marble export company in Turkey in 1995. He is a member partner in the subsidiary that the Company has developed for its future operations in Turkey. He received a B.A. degree in Mining Engineering at Middle East Technical University in Ankara, Turkey.

John F. Ruffle

JOHN F. RUFFLE has been a director since 1995. He retired in 1993 as Vice-Chairman of the Board and a Director of J.P. Morgan & Co. Incorporated and Morgan Guaranty Trust Co. of New York. He is a Trustee Emeritus of The Johns Hopkins University. From December 1996 to May 2009 he was a member of the board of trustees of certain mutual funds in the J.P. Morgan Family of mutual funds and certain investment funds managed by J.P. Morgan Investment Management, Inc. From March 2004 to January 2007, he was a director for Reckson Associates Realty Corp. Mr. Ruffle graduated from The Johns Hopkins University, has an MBA in finance from Rutgers University, and is a Certified Public Accountant.

Raymond Stachowiak

RAYMOND C. STACHOWIAK joined the Board of Directors in 2009. He founded Shared Imaging in 1994 with the purchase of the assets of Shared Imaging Partners, L.P. He has served as President and Chairman since its inception. In December 1999, he acquired Advanced Healthcare Resources, Inc. of Iowa. Together these entities comprise Shared Imaging, LLC. Shared Imaging, LLC is a preferred independent provider of CT, MRI and PET/CT equipment and services. He received his undergraduate degree in Business from Indiana University in 1979 and received an MBA from Indiana University in 1985. Mr. Stachowiak has CPA (Certified Public Accountant), CPIM (Certification in Production and Inventory Management) and CIA (Certified Internal Auditor) certifications.

Stanley S. Trotman, Jr.

STANLEY S. TROTMAN, JR., has been a director of the Company since 1996. He retired in 2000 as a Managing Director with the Health Care Group of PaineWebber Incorporated, an investment banking firm. Mr. Trotman was with PaineWebber since 1995 following its consolidation with Kidder, Peabody, also an investment banking firm, and since 1990 had co-directed Kidder, Peabody's Health Care Group. Prior to this position, he headed the Health Care Group at Drexel Burnham Lambert, Inc. where he had been employed for approximately 22 years. He is currently a director of Web MD Health Corp. and Ascend Health Care Corp., and was a director of Oncure Medical Corp. from 1999 to 2007. Mr. Trotman received his undergraduate degree from Yale University in 1965 and obtained an MBA from Columbia Business School in 1967.

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