Apollo Medical Holdings




Kenneth Sim, M.D.

Executive Chairman & Co-Chief Executive Officer

Dr. Sim has been the Chairman of NMM since 2013 and has been a member of NMM’s board of directors since 2006. Dr. Sim is also the Chairman of the board of APC. Dr. Sim is a Fellow of the American College of Surgeons and was awarded the Independent Physician Leadership Award in 2014 by the Los Angeles County Medical Association. Dr. Sim is also a member of the Governing Board of Directors at Alhambra Hospital Medical Center and a Board Member on the National Council of Asian Pacific Islander Physicians.

As an entrepreneur, Dr. Sim founded “Healthcare City” in the City of Industry, California, which helped streamline the healthcare process by providing outpatient health services at one location including surgical center, senior wellness center, laboratory, radiology and urgent care.He received his bachelor's degree from the University of California Los Angeles and received his medical training from the Loma Linda University School of Medicine and the Autonomous University of Guadalajara, Guadalajara, Mexico.

Thomas S. Lam, M.D., M.P.H.

Co-Chief Executive Officer & PresidenT

Dr. Lam has been a member of ApolloMed’s board of directors since January 2016. Dr. Lam has served as Chief Executive Officer of NMM since January 2006. Dr. Lam has served as Chief Executive Officer of NMM since January 2006 and has been a member of NMM’s board of directors since 2005. From January 2006 to September 2014, Dr. Lam was the Chairman and CEO of APC. Since October 2014, he has served as the Chief Executive Officer and Chief Financial Officer of APC.

Dr. Lam was the recipient of the Corporate Citizens of the Year Award from the Board of Directors of East Los Angeles College Foundation in April 2014. In February 2015, YMCA Board of Directors of West San Gabriel Valley honored Dr. Lam as the recipient of Heart of the Community Award. Dr. Lam received his medical training from New York Medical College and gastroenterology training from Georgetown University. Dr. Lam serves as the nominee of NMM.

Hing Ang


Mr. Ang has been the Executive Vice President since 2014 and Chief Financial Officer of NMM since 2016. Mr. Ang spent his last 10 years with NMM where he gained extensive health care operation experience through the senior director of operations since 2007 to his current positions. Prior to joining NMM, Mr. Ang held a variety of senior management positions for a variety of companies internationally. Mr. Ang is a Fellow of the Association of Chartered Certified Accountants in England and he is also licensed as a Certified Public Accountant in California.

Eric Chin


Mr. Chin has served as the Chief Financial Officer of Network Medical Management, Inc., one of the Company's subsidiaries, since March 2018. Prior to joining Network Medical Management, Mr. Chin served as the Controller/Head of Finance - Real Estate of Public Storage, a New York Stock Exchange listed company and a member of the S&P 500. From May 2011 to October 2015, he served as Assistant Vice-President - Financial Reporting of Alexandria Real Estate Equities, Inc., a New York Stock Exchange listed company and a member of the S&P 500. Mr. Chin began his career at Ernst & Young LLP in 2002.

In his role as an Assurance Senior Manager at Ernst & Young LLP, Mr. Chin provided assurance services to both publicly traded companies and private companies. In addition to providing audit and attestation services, Mr. Chin assisted clients with services related to equity offerings, debt offerings and technical research. Mr. Chin is a Certified Public Accountant and a Certified Healthcare Financial Professional. He received his Bachelor of Arts degree in Business/Economics with Accounting and Computing from UCLA.

Adrian Vazquez, M.D.


Dr. Vazquez, has served as ApolloMed’s Chief Medical Officer since March 2014, having previously served as ApolloMed’s President and Chairman of the ApolloMed board of directors from 2008 to 2011. Dr. Vazquez co-founded ApolloMed Hospitalists in 2001. He received his B.S. in biology from the University of California, Irvine, his medical degree from the UC Irvine School of Medicine and his residency in internal medicine from the Los Angeles County-University of Southern California Medical Center.

Albert Young, M.D.


Dr. Young has served as the Chief Administrative Officer of NMM since 2019 and have previously served as Chief Medical Officer since 2006. Dr. Young is also the Chief Medical Officer of APC. Dr. Young received his medical degree from West Virginia University School of Medicine and completed his internal medicine residency training at Los Angeles County and USC Medical Center. Upon completing his residency training, Dr. Young completed a Fellowship in pulmonary medicine. An advocate of general preventive medicine, Dr. Young also obtained a Master’s in Public Health from UCLA in 1998.

Brandon Sim

Interim Chief Technology Officer

Mr. Sim has served as the Interim Chief Technology Officer of NMM since 2019. Prior to joining ApolloMed, Mr. Sim served as Quantitative Researcher at Citadel Securities since 2015. From 2012 to 2014, Mr. Sim served as Chief Technology Officer at Theratech, a medical device company focused on developing a low-cost, simple-to-use patch for automated drug delivery. Mr. Sim received his Master of Science in Computer Science and Engineering and Bachelor of Arts in Statistics and Physics, Magna Cum Laude with High Honors, from Harvard University.