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The Ria Health Team
Our experienced team is committed to transforming alcohol addiction treatment
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Our Medical Team
John Mendelson, MD
CMO, Emeritus
Professor of Medicine, UCSF; Senior Research Scientist Friends Research Institute; Medical Director, Bay Area Addiction Research and Treatment (BAART) Programs; Distinguished in Clinical Research and Primary Care Medical Practice.
Vipul Patel, MD
Ria Health Physician
Dr. Vipul Patel is a board certified internist with over 25 years of experience who has practiced addiction medicine since 2000. He helps Ria members overcome alcohol misuse.
Trinette L. Radasa, DNP
Psychiatric Mental Health Nurse Practitioner
Trinette L. Radasa holds a Doctorate in Nursing Practice and three nursing certifications: ACNS, FNP, and PMHNP. She directs the PMHNP-DNP program at the University of San Francisco and is a member of the Ria Health medical team.
Brian Clear, M.D. FASAM
Chief Medical Officer
Dr. Brian Clear is board certified in family medicine and addiction medicine, with 14 years leading addiction medicine programs, most recently as founding Chief Medical Officer of Bicycle Health.
Ben Gardner, DNP
Registered Nurse and Nurse Practitioner
Ben Gardner is a certified Nurse Practitioner with a Doctorate in Nursing Practice from the University of San Francisco. He brings over a decade of experience in critical care and diagnostics to the Ria Health medical team.
Oseni Abiri, APRN, MSN, MPH, PMHNP-BC
Nurse Practitioner
Oseni Abiri is a board-certified psychiatric mental health nurse practitioner with more than 15 years of clinical experience. He specializes in treating alcohol use disorder and co-occurring mental health conditions.
Guylaine Dunac, DNP, FNP-BC, PMHNP-BC
Nurse Practitioner
Guylaine Dunac is a dual board-certified Family Nurse Practitioner and Psychiatric Mental Health Nurse Practitioner with a Doctor of Nursing Practice from Nova Southeastern University.
Andrea Krasno, PMHNP-C
Psychiatric Mental Health Nurse Practitioner
Andrea Krasno has worked as a registered nurse since 1978. She received an MSN from Monmouth University and was certified as a Psychiatric Nurse Practitioner in 2009.
James Walker, MD
Ria Health Physician
Dr. James Walker is a board certified adult and addiction psychiatrist with over 10 years of clinical experience. He has worked at Ria Health since 2022, helping members build a healthier relationship with alcohol.
Michael Krivitsky, MD
Ria Health Physician
Dr. Michael Krivitsky is Board Certified in Internal Medicine and Addiction Medicine with more than 35 years of experience. He is a knowledgeable, compassionate provider who helps patients achieve their health and recovery goals.
NITA KOFCHOCK, PMHNP
Psychiatric Mental Health Nurse Practitioner
Board Certified Psychiatric Mental Health Nurse Practitioner and Women’s Health Nurse Practitioner. 15 years’ experience, including emergency and outpatient psychiatry, and residential treatment. Recent clinical work within psychiatry and chemical dependency.
Our Administrative Team
BILL Stapleton
CEO
Bill serves as CEO of Ria Health. Prior to Ria, he founded HealthPlanOne, a leader in marketing and contact center solutions focused on Medicare. Bill has also held senior roles at Oxford Health Plans, HCA, and Health Net, Inc. He earned his CPA at KPMG, received a B.A. from The College of the Holy Cross and an M.B.A. from Harvard Business School.
Susan Harrington
CFO
Susan is a seasoned corporate leader with a passion for innovation and global impact. She boasts a remarkable 14-year career at Fresenius Medical Care in M&A and finance leadership, overseeing $5 billion in investments across 35 transactions. Susan’s dedication to addressing unmet needs in healthcare, along with her “one-step” philosophy, drives her towards achieving ambitious goals. She received a B.S. from Fairfield University and an M.B.A. and M.S.F. from Boston College.
Mike Stapleton
CIO
Mike has been CIO for several successful startups and early stage companies. Balancing agility and stability and costs, he has been able to allow these companies to excel at their core missions.
Fernanda De Lara
Head of People Operations
Starting her career in recruitment, Fernanda swiftly moved through roles in people success and HR. Now leading Ria Health’s People Operations, she’s an advocate for cultivating an exceptional company culture and guiding individuals to fulfilling career paths. Passionate and forward-thinking, she ensures our work environment is not just productive, but also inclusive and inspiring.
Josh Gold
Vice President, Business Development
Josh is an experienced growth leader in Behavioral Health. Previously with Aware Recovery Care - led growth efforts through two fundraising rounds and expansion into 7 new markets.
Board Members
Carol Vallone
Board Chair
Seasoned CEO and board member who has launched, scaled, and sold SaaS and tech-enabled services companies, and currently advises high-growth healthcare organizations. Board chair of McLean Hospital, the #1 ranked psychiatric hospital in America, and the largest psychiatric affiliate of Harvard Medical School. Board and finance committee member for the Mass General Brigham hospital system. Board chair of public biopharm, MindMedicine; board chair of private CrowdComfort; independent director of PE-backed Arosa and independent director of PE-backed HighTop Health.
Martin Rosenzweig, MD
Board Member
Former Chief Medical Officer for Behavioral Health at Unitedhealth Group. Licensed physician, and board advisor to behavioral health startups.
Michael Balmuth
Board Member
Managing Partner at SV Health Investors and is focused on digital health and healthcare services investments. He backs strong management teams offering innovative services and technology-enabled solutions for healthcare providers, payers, patients/employers and pharmaceutical/life sciences companies. His track record of investing in healthcare services and technology includes recent M&A exits at Aligned Telehealth, AmWell, Aerocare, Healthify, Maestro Health, CambridgeSoft, DiagnosisOne and Octagon Research.
Michael O'Rourke
Board Member
Michael is a Partner at Peloton Equity, where he focuses on investments in Provider and Payor Services. He joined the firm at its predecessor, Ferrer Freeman & Company, where he advanced from Associate to Partner. He began his career at CIT Group in healthcare investment banking. Michael has served on the boards of eight Peloton portfolio companies and currently serves on the boards of ClearSky Health, Grenova, HPOne, and Ria Health. He holds a Bachelor’s degree from the University of Virginia’s McIntire School of Commerce.
Drew McCartney
Board Member
Mr. McCartney has been the CEO of five institutional capital-backed tech, service, and e-health enterprises, specializing in building and scaling organizations with multiple exits to strategic and financial acquirers. Since 2007, Drew has been called upon by private equity sponsors to turn around businesses operating below their potential, building teams, driving growth, and creating value across diverse healthcare service platforms. Drew and the teams he assembled have achieved monetization for the business and sponsors across multiple sectors, including specialty pharmacy, senior/elder care services, brain injury services, mental health and addiction services, and physician practice management expansion. Currently, Drew advises on four behavioral health boards, engaged by investment sponsors from the PE and debt communities. Previously, Drew worked at Baxter International for 15 years. Drew holds a bachelor’s degree in government and foreign affairs from the University of Virginia.
John Mendelson, MD
Board Member, CMO Emeritus
Professor of Medicine, UCSF; Senior Research Scientist Friends Research Institute; Medical Director, Bay Area Addiction Research and Treatment (BAART) Programs; Distinguished in Clinical Research and Primary Care Medical Practice.