Governors' Welcome

Welcome to the California Chapter website! This site has been developed to keep internal medicine physicians and subspecialists in California up to date on the developments and activities in our Chapter.

ACP is the nation's largest medical specialty organization. Membership comprises more than 160,000 internal medicine physicians, medical students, and allied health professionals. Our California Chapters have a growing membership of 12,650. We are your link to the larger organization, your grassroots advocacy partner, and your local supplier of educational, professional, and social programs. Our goal is to be your local professional home.

As Governors, we are responsible for representing our Chapters to the national organization; encouraging internal medicine physicians in our state to become members; helping members advance to Fellowship; recognizing members for their achievements; soliciting input and action on national and local political issues affecting internal medicine, and then addressing state legislature to speak for our members and their patients; hosting local scientific meetings and CME events; and encouraging Medical Student Members and Resident/Fellow Members to participate in local and national College activities. We offer valuable networking, professional development, advocacy, and educational activities to enhance your member experience.

Keep an eye on your inbox for our chapter newsletters and other communications from the chapters highlighting member achievements, as well as upcoming opportunities to engage with one another. You can also find contact information for our chapter. We welcome any suggestions you might have for our website and the chapter - We need your feedback so we can better serve you and do our part to help make us all better, happier internal medicine physicians.

We encourage you to visit this site frequently for updates and join us at one of our upcoming programs! And if you’re not currently a member, please consider becoming one and taking advantage of all the excellent ACP benefits.

If you have questions, please reach out to us or our chapter staff at any time. We look forward to engaging with you!


Chwen-Yuen ("Angie") A. Chen , MD, FACP
ACP Governor, ACP Northern California Chapter

Eric Hsieh, MD, FACP
ACP Governor, ACP Southern California Region 1 Chapter

Rejan C. McCaskill, MD, FACP
ACP Governor, ACP Southern California Region II Chapter

Tammy L. Lin , MD, MPH, FACP
ACP Governor, ACP Northern California Southern III Chapter