Cornerstone of Southern California, Celebrating 40 Years
Phil Kosanovich, MBA
President & Chief Executive Officer

Phil has a senior leadership profile that spans from entrepreneurial ventures to global corporations. His experience includes consulting, operational, and executive-level roles in the behavioral health and addiction treatment industries that include co-founding and growing two residential and outpatient treatment centers. Phil is an inclusive and transformational leader with a reputation for building strong client/patient-centered teams focused on clinical excellence. He has an extensive record of success in leading companies through transitional periods of growth and creating and maintaining strong external partner relationships.

Phil’s expanded healthcare industry experience was with Landauer, where he started two subsidiary companies and led company operations in Australia and China. Prior to his 30 years in the healthcare industries, Phil was president of human resource and financial services related subsidiaries of Travelers, Equitable, Lincoln Financial Group, and Chicago Title & Trust. He has served on the executive board and in multiple leadership roles of a global human resources trade organization and elected into that industry groups Hall of Leaders. Phil has served on the boards of several healthcare-related charities and is the Chair of the Community Relations Commission in his hometown. Phil earned an MBA from DePaul University and a Bachelor of Science in Business Administration from Valparaiso University. He is in long term recovery.

Author’s publications

The Growing Danger of Fentanyl with Xylazine & Treatment Options

By Phil Kosanovich on October 25, 2023
Fentanyl and Xylazine: The Increasing Dangers and Treatment Options In the last 10 years, the dangers of Fentanyl exposure have become increasingly more wide spread, including and especially across public platforms and social media. And though both healthcare professionals and government establishments, including the U.S. Department of Justice Drug Enforcement Administration (DEA), the Federal Drug […]
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Celebrating National Recovery Month: Together We are Stronger

By Phil Kosanovich on September 18, 2023
Celebrating National Recovery Month This September Addiction is a disease that not only affects the individual, but their entire network – family, friends, community, and beyond. While consistently misunderstood and stigmatized, it’s vital for individuals and community members to have a platform that both celebrates and encourages new recovery and sobriety practices, giving them the […]
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The Value of Staying Sober “One Day at a Time”

By Phil Kosanovich, MBA on May 2, 2024
“On a day-at-a-time basis, I am confident I can stay away from a drink for one day. So, I set out with confidence. At the end of the day, I have the reward of achievement. Achievement feels good and that makes me want more!” – Bill Wilson, founder of Alcoholics Anonymous The phrase of taking […]
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Why Choose Cornerstone of Southern California?

By Phil Kosanovich, MBA on May 2, 2024
Since 1984, Cornerstone of Southern California has pioneered addiction treatment in Southern California under the direction of Dr. Michael Stone. Cornerstone is in the beautiful setting of Orange County, California and offers a network of licensed dual diagnosis mental health and addiction treatment centers alongside many sober living homes. We specialize in the full spectrum […]
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What to Expect with Medical Detoxification

By Phil Kosanovich, MBA on April 28, 2024
Medical detox in addiction rehabilitation marks the initial phase of recovery from substance abuse, but what happens during detox? Detox involves the removal of the substance to allow the body to expel accumulated toxins and recover. Withdrawal symptoms, resulting from this process, vary based on factors like substance type, individual health, and duration of abuse. […]
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How To Find the Right Detox Center for You

By Phil Kosanovich, MBA on April 27, 2024
Substance abuse disorders are life-altering for individuals and their loved ones, but the path to recovery is both courageous and achievable. Central to the recovery journey is selecting the appropriate rehabilitation and detox center to provide essential support and guidance. With many factors to consider when choosing a rehab and detox facility, the decision can […]
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