About Comprehensive Medical Solutions

Meet Our Team

About Our Company

CompMed was founded in January of 2010 by Doug Esbach and Clarissa Harris in a collaboration of medical billing, accounting, and business management expertise with over 75 years of cumulative experience. The core management group of this entity has worked in the Mid-Atlantic/Southeast since the mid 1980’s; providing expertise during the computerization and automation of the billing process to the current requirements of the Patient Protection and Affordable Care Act (PPACA) and Accountable Care Organizations (ACOs). This extensive experience and superior reputation for personalized client service has allowed CompMed to grow in a superior service level niche for clients who desire local hands on management.  CompMed uses Best of Breed technology with the strength to bring an end-to-end solution to market. It was the capability and flexibility that led them to choose the highly intuitive Imagine software platform. This exceedingly automated software expanded the CompMed capabilities and allowed us to offer services to almost all types of physician practices.

In an environment fraught with the perils of rapid change, government regulations, and changing reimbursement; CompMed is uniquely qualified to respond to the informational and practice management needs of today’s medical practice.


Meet Our Team

Doug Esbach

Doug Esbach

Chairman and Chief Executive Officer, Co-Founder

Mr. Esbach co-founded CompMed in January 2010 to provide expert medical billing, accounting, and business management to the physician community in the Mid-Atlantic and Southeast regions. He has over 30 years in the industry as Executive Vice President of Sales and Marketing with regional and national firms such as CompMed, Per Se Technologies, National Data Corporation, and MPM.

Prior to that he was Branch Manager and General Sales Manager for IBM/ROLM Corporation for the South Florida Region.

Mr. Esbach graduated from James Madison University and holds a Bachelor of Business Administration degree in Marketing and Management.

Mr. Esbach resides in Ft. Myers, Florida and is based in CompMed’s corporate office in Chattanooga, Tennessee.


Angela Patterson

Angela D. Patterson, FACMPE, CPCO

Chief Operating Officer

Ms. Patterson joined CompMed in January 2010 as an expert in medical billing, Human Resources, and HIPAA Compliance. She has over 25 years experience in practice management and medical billing working for such companies as CompMed, Medaphis/Per Se Technologies, ABC/National Data Corporation, and MPM. Ms. Patterson is instrumental in assisting our software vendor with software development and improvements to make the billing process more efficient and automated. Ms. Patterson analyzes managed care contracts for CompMed clients and leads the Credentialing Team.

Ms. Patterson received a BS degree from Berry College in Rome, Georgia where she double majored in Economics and Business Management and minored in Accounting.

She is certified by the American Academy of Procedural Coders (AAPC) as a Certified Professional Compliance Officer (CPCO). Ms. Patterson has earned the professional designation of Fellow from the American College of Medical Practice Executives (FACMPE), the certification entity of the Medical Group Management Association (MGMA). Ms. Patterson serves as CompMed’s Compliance Officer and Security Officer. She is responsible for maintaining and enhancing CompMed’s Compliance Plan program.

Ms. Patterson is a member of the RBMA (Radiology Business Management Association), National MGMA, Tennessee MGMA, and Cleveland, Tennessee MGMA.  She is the 2022 President Elect of the Cleveland MGMA Chapter. She is an active member of her local Cleveland, Tennessee Chapter of the AAPC and has served in various Officer roles such as President and Treasurer. 

Ms. Patterson resides in Cleveland, Tennessee and is based in CompMed’s corporate office in Chattanooga, Tennessee.

Tara Jarnagin

Vice-President Client Financial Services

Ms. Jarnagin joined CompMed in January of 2010 and has provided Client Financial Services to the medical practice field since 1997.  She has worked extensively with Radiology and Anesthesia practices in both operational and financial reporting and budgeting and provides expertise in assessing outside vendor products such as banking, malpractice insurance, and retirement programs. She worked with Management Sciences Network and MPM before joining CompMed.  Ms. Jarnagin is a long time member of the Dalton Medical Group Manager’s Association.

Ms. Jarnagin resides in Ooltowah, Tennessee and  is based in CompMed’s  Processing Center in Dalton, Ga.


Valerie Sisson, CPC, RCC

Director of Operations

Ms. Sisson joined CompMed in January 2010 as Coding Supervisor.  She has over 10 years experience in radiology and anesthesia coding and billing.  She supervises CompMed’s staff of certified coders, conducts internal coding audits, and provides coding education and re-training.  She oversees CompMed’s billing offices.

Ms. Sisson was employed by MPM as a Certified Coder prior to joining CompMed.

She is certified by the American Academy of Procedural Coders (AAPC) as a Certified Procedural Coder (CPC) and by the Radiology Coding Certification Board (RCCB) as a Radiology Certified Coder (RCC).  She is pursuing the CEMC (Certified Evaluation and Management Coder) designation with the AAPC.

She is an active member of her local Chattanooga, Tennessee AAPC Chapter and Dalton, Georgia MGMA.

Ms. Sisson resides in Chatsworth, Georgia and is based in CompMed’s main Processing Center in Dalton, Georgia.


Sarah Sharp

Assistant Director of Operations

Ms. Sharp joined CompMed in January 2010.  She has over 10 years experience working with radiology,  anesthesia, and facility-based provider’s electronic billing processes.  She ensures that client demographic and charge interface files are received, electronic claims are filed, electronic payment files are processed in, secure text notices are delivered, paper statements are generated, and that work flows to and from our clearinghouse efficiently.  

She is an active member of her local Dalton, Georgia MGMA.

Ms. Sharp resides in Dalton, Georgia and is based in CompMed’s main Processing Center in Dalton, Georgia.

Rachael Morrison

Rachael Morrison

Credentialing Manager

Ms. Morrison joined CompMed in March 2010.  She has over 16 years experience working with a variety of provider types and specialties.  She ensures that all individual provider and group credentialing is maintained and kept up-to-date.  She sets up EFTs, prepares the initial enrollments, and processes recredentialing/revalidations timely.  She completes most of her work online in the insurance portals, such as PECOS, CAQH, Availity, etc.  Rachael’s credentialing success is attributed to developing relationships with insurance company provider representatives across the United States.

Ms. Morrison resides in Cleveland, Tennessee and is based in CompMed’s main Processing Center in Dalton, Georgia.

Clarissa A. Harris

Co-Founder, Retired