Leaders at Zenith and in Healthcare
Dr. David Pak
Chief Executive Officer & President
Dr. David Pak has been practicing medicine as a board-certified internist for over 25 years and he still continues to enjoy seeing patients to this day. He founded Allied Institute of Medicine in 2000 which consisted of seven primary clinics, a transitional care program, wellness center primarily focused on geriatrics, hospitalists, house call program, telehealth. All service lines were sold to Humana in 2012. He went on to do consultant work for Optum and Vanguard health systems. He later became the medical director for a startup in Las Vegas to help build the Culinary Health Center. He was instrumental in recruiting all of the clinicians, developing SOPs and workflows for the internal medicine, family practice and pediatric services for the union workers for all of the major casinos. After his non-compete expired in 2018 he returned to his home in Texas.
He immediately dove back into what he loves and created ZENITH Independent Physicians Network an IPA for primary care clinicians focused on senior care in 2022. His ultimate goal is to improve patient care and outcomes by ensuring each patient receives the right care, at the right time, and at the right place. When he is not burning the midnight oil or welcoming new business ventures, you can find Dr. Pak on the tennis court, or golfing with Kristy, his wife and best friend.
Chief Financial Officer
Kristine Pak is a Certified Public Accountant with over 25 years of private and public industry accounting experience. Prior to Zenith Integrated Specialists, she was the Controller of P3 Health Partners which focused on delivering patient-centered care in Nevada and Arizona. Kristy is thrilled to be back in Texas to help improve the quality of healthcare in the community she calls home. In her spare time, Kristine enjoys playing tennis and golf with family and friends.
Revenue Cycle Director
Joining our team with over 30 years of experience in the medical field, Tomasa has been an entrepreneur since 1998. Alongside her husband Jerry O’hern, Tomasa has opened multiple businesses within multiple sectors of the market. Starting in 1992 working for an ophthalmologist in her hometown of Kerrville, Texas she grew a love for the medical field. This led her to open her first business OMB, a turnkey RCM at age of 21 in San Antonio, Texas. Throughout the 15 years alongside her RCM, she co-owned an IT and EMR company. She moved back to Kerrville, Texas in 2011 to be closer to family where she went on to own her restaurant and clothing boutique.
During her free time, Tomasa enjoys spending quality time with friends and family. She also enjoys spending time and going on walks with her three dogs.