North American Medical Management (NAMM) California, Inc., part of OptumCare®, develops and manages provider networks, offering a full range of services to assist physicians and other providers in their managed care and business operations (the “Clients”). For over 25 years, NAMM has been an innovator in health care with a track record for quality, financial stability, extraordinary services and superior electronic capabilities. NAMM is well positioned to continually invest in its infrastructure and systems for the benefit of its Clients and to accommodate the impending changes that will come forth from healthcare reform. The NAMM Clients represent a network of over 600 primary care physicians and 1,500 specialists and work with the premier hospitals in their respective markets.
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NAMM California Questions
The NAMM California annual revenue was $77.8 million in 2026.
Rod St.clair is the CMO of NAMM California.
96 people are employed at NAMM California.
NAMM California is based in Ontario, California.
The NAICS codes for NAMM California are [5416, 54, 55, 541, 541611, 551, 54161].
The SIC codes for NAMM California are [87, 874, 67, 671].
Top NAMM California Employees
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Rod St.clair
CMO at NAMM California
Ontario, CA, US25+ -
Rod st.
CMO at NAMM California
Ontario, CA, US1 -
25+
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Diane Gephart
Executive Director at NAMM California
Upland, CA, US22 -
Dan-Yu Wang
Regional Medical Director at NAMM California
Los Angeles, CA, US55+ -
1
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Sherri Olubode
Senior Medical Coder at NAMM California
Moreno Valley, CA, US12 -
Debbie Adams
Director of Case Management at NAMM California
Corona, CA, US22 -
Carol Hairston
Vice President Health Services at NAMM California
Fullerton, CA, US25
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