714.505.9000 cpas@hmwccpa.com


Arthur Wiederman, CPA

Art Wiederman is a partner and works in HMWC CPAs & Business Advisors’ division, Wiederman & Chamberlain, that specializes in serving dental practices. The division’s services include accounting, tax compliance and planning, financial planning, retirement planning, and financial practice management consulting.

Art’s expertise is not only in taxation issues for dentists but also in his knowledge of dental practice metrics and benchmarks. Art has the ability to look at a dentist’s profit and loss statements and practice management reports and identify profit holes in his client’s practice. In addition, Art’s specialties include buy-in and buy-out consulting, practice start-ups, compensation plan development, operation evaluations, and litigation support for dentists.


Art has over 30 years of experience in serving dental practices. He began his career in the tax department of the national CPA firm Deloitte, Haskins and Sells (now Deloitte) from 1981-1984 and left in 1984 to take over the Pacific Institute’s Financial Services Division. Art bought the company and it was renamed Wiederman & Associates in 1989, and then developed it into a boutique CPA practice specializing in serving dentists. Pam Chamberlain joined the firm in 1988 and became a partner in 2014, when it was renamed Wiederman & Chamberlain. In 2018, W&C became a division of HMWC, continuing to serve dental practices exclusively.

As an expert in dental practice accounting and financial management, Art is a regular lecturer at state, local and national dental conferences, dental societies, dental schools, and hosts the “The Art of Dental Finance” podcast.

  • B.S. in Accounting from California State University, Long Beach


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Tustin, CA 92780











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