Our Team

Our management team has over 100 years of combined experience in leadership, management, revenue cycle and technology experience.

We are a service centered company where hard work and a positive approach is expected of everyone. The right way is not always the easy way, but we do whatever it takes to get the job done. In addition to a great management team, our staff works intelligently to ensure the most efficient results for partner organizations.

With California Medical Business Services on your team, we will work together to solve your medical practice management needs.

Alicia Vasquez

Alicia Vasquez

CRA, FRBMA
Chief Executive Officer
Laura Tierney

Laura Tierney

Chief Financial Officer
Laura Tierney
Chief Financial Officer

Laura Tierney is the Chief Financial Officer for California Medical Business Services. Laura manages the company’s finances, including financial planning, management of financial risks, record-keeping, and financial reporting. As CFO, Laura directly assists the CEO on all strategic and tactical matters relating to budget management, cost–benefit analysis, forecasting needs, and securing of new funding. Laura graduated with honor from the University of Wyoming in Laramie, Wyoming where she received a Bachelor of Science degree in Accounting. Laura moved to Southern California in 2014 when she joined CMBS as CFO.

Cathy Vesolowski

Cathy Vesolowski

Vice President of Clinical Operations
Stephanie Hatton

Stephanie Hatton

Director, Revenue Cycle
Stephanie Hatton
Director, Revenue Cycle

Stephanie Hatton is the Revenue Cycle Director for California Medical Business Services in Arcadia, California.  Ms. Hatton has over 19 years of revenue cycle management experience.  She is a member of the RBMA, HBMA, and MGMA and is a Certified Healthcare Billing and Management Executive (CHMBE).  Ms. Hatton worked with Noridian Medicare in 2014 to crosswalk their LCD’s from ICD-9 to ICD-10.  She specializes in Radiology but has worked with multiple specialties to streamline their revenue cycle and improve reimbursement.  Ms. Hatton also has expertise in MACRA, MIPS, HIPAA, and Compliance.

Howard Yang

Howard Yang

Director, IT
Howard Yang
Director, Information Systems

Mr. Yang joined CMBS in 2009 as the Information Systems Director and has over 25+ years’ experience in the medical industry. Mr. Yang is responsible for all aspects of IT service delivery and operation. Prior to joining the firm, Mr. Yang was a Project Manager at Toshiba America Medical Systems. He worked on various projects including customized decision supports, and designed and implemented new solutions to imaging systems for radiology and service departments. Mr. Yang has a Master’s degree in Computer Systems Engineering at Rensselaer Polytechnic Institute of Troy, New York.

Marc Behun

Marc Behun

Director, Integration
Marc Behun
Director, Integration

Marc Behun is the Director of Integration for California Medical Business Services in Arcadia, California. Marc started his IT career in 2002 and has 25 years’ experience in the healthcare industry. He is currently responsible for managing all of CMBS Telecommunications, as well as, many other IT projects that pertain with the growth of CMBS. In addition to IT duties, he is also the Facilities Manager for all of the CMBS sites. Prior to starting with CMBS Marc worked for a local radiology group and held the titles of IT Manager and PACS Manager.

Beth Filip

Beth A. Filip

Director, Quality and Compliance
Annabelle De La O

Annabelle De La O

Director, Service Center
Luz Chaidez

Luz Chaidez

Director, Human Resources
Michael Rockwell

Michael Rockwell

Manager, Transcription and Medical Records
Carlos Munoz

Carlos Munoz

MSIE, Certified in Lean Manufacturing, Operational Excellence Engineer
Cesar Muralles

Cesar Muralles

Business Analyst
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