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Mr. Conrad serves as co-founder and President of MBC Systems a leading medical billing service.

He also serves as co-founder, director, and member of the Executive Management Committee of Southern California Sports Rehabilitation a leader in land and aquatic physical therapy services.

Michael Weinstein



Mr. Weinstein co-founded and serves as Chairman of MBC systems, a leading medical billing service provider with extensive experience in the Workers' Compensation system, and Chairman President and co-founder of Winston Financial Group Inc, a diversified financial services company.

Mr. Weinstein is also President, Director, co-founder, and Chairman of the Executive Management Committee of SCSR. Prior to SCSR, he co-founded and served as President of Michael Kaye, formerly one of the nation's largest furniture manufacturers.

Mr. Weinstein has been a member of the Board of Directors of the YMCA of Greater Whittier since 1999, and currently serves on the Executive Committee of the Board and as Chairman of the Golf Committee.


Director of Operations

In her role as Director of Operations, Erica Weinstein-Galvez’s primary focus is on daily operations of MBC Systems.

She has been with the company for over 20 years and has complete knowledge of the entire medical billing and revenue generating process.

She evaluates the efficiency of MBC Systems work flows according to operational objectives and applies improvements.


Information Technology Manager 

Henry Nguyen earned his Bachelor of Science degree in Information and Computer Science from the University of California, Irvine.

He began working with MBC Systems in 2009 and, in 2012 was named the Information Technology Manager.

In this position, Henry directs, develops, and delivers technology solutions in order to advance MBC Systems goals.


Collections Manager 

Tammy originally worked for MBC Systems from 2005 through 2012 then rejoined the team on November 1st, 2018.

Tammy is our Collections Manager and her role to generate maximum revenue for our clients, identify denial trends then make any required corrections to avoid denials on future claim submissions. She also works closely with payers on their unfair payment patterns.

She works closely with the collection staff to insure they have all tools needed to excel in their jobs, work efficiently while providing an enjoyable work environment. Tammy has been in Healthcare Administration since the early 1980’s and has an extensive knowledge of Professional and Facility Billing & Collections.


Billing Manager

In her dual role at MBC Systems, Tina Plascencia is responsible for ensuring quality control and compliance with state and federal laws.

Tina joined MBC Systems in 2001 and since that time has excelled at her various positions before moving into her current one in 2013.

Her expertise with ICD-10 and CPT coding is only matched by a desire to maintain compliance at all times. Tina is responsible for day to day billing workflows and relevant industry changes.


Client Services

Kimmie Le joined MBC Systems in 1998, working in a variety of positions.

Kimmie handles a wide set of tasks such as client billing, general human resource questions, employee benefits, and reporting.



At MBC Systems, everything flows from our core values of Integrity, Service, Excellence and Passion. We search constantly for motivated, success-driven people who rise to the challenge of contributing to their own on-going growth and success while contributing to ours.

For inquiries please email with attached resume.

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1809 East Dyer Road, Suite 311
Santa Ana,CA 92705
(949) 863-0022
949-863-0023 - Fax
Service Area:
Los Angeles
Orange County
San Diego
& all of California

We bill it. You get paid.

1809 East Dyer Road, Suite 311
Santa Ana, CA 92705
(949) 863-002