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About me

My practice is focused on health care fraud / Medicare audit defense, internal audits / investigations, compliance and regulatory matters. I have represented a wide variety of clients in connection with Zone Program Integrity Contractor (ZPIC) and Program Safeguard Contractor (PSC) defense cases 

Before entering private practice, I served as Deputy Director for Legal Programs at the United States Department of Justice (DOJ), Executive Office for United States Attorneys (EOUSA).

Prior to serving in Washington, D.C., I worked as an Assistant United States Attorney in the Southern District of Texas, Houston office, where he primarily handled False Claims Act matters and cases. I was subsequently appointed as Chief of the Financial Litigation Unit for the Southern District of Texas.

In 1997, I was detailed to the EOUSA in Washington, D.C. as its first National Health Care Fraud Coordinator. In this capacity, I advised Assistant United States Attorneys around the country on civil and criminal health fraud statutes, schemes, investigative tools, privacy concerns, and compliance issues. I have taught and lectured at more than 50 national conferences and seminars to DOJ prosecutors, investigators, auditors, and industry representatives on a variety of civil and criminal fraud and regulatory issues.


I am married and have two sons, ages 16 and 18. 




Languages spoken: Spanish

Practice areas


  1. Health Care: 100%
    23 years



Hourly ($495-625/hour), contingent (30-40%), Fixed (sometimes), Retainer (always), Free consultation (60 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

11 total 

Are you an attorney? Endorse this lawyer

  • Robert Corey Heit

    I endorse this lawyer. Robert is an excellent attorney and an even better person. I had the privilege to work with Robert and I consider him a great friend and mentor.


    Robert Heit Personal injury Attorney
    Relationship: Worked for lawyer

  • Paul Stuart Weidenfeld

    Robert is a great lawyer and a terrific person. I am pleased to endorse him!


    Paul Weidenfeld Health care Attorney
    Relationship: Other

Contact info

Liles Parker, PLLC

800 Rockmead Dr. (By Appointment Only)
Three Kingwood Place, Suite 165
Houston, TX, 77339

Liles Parker, PLLC

3400 N. McColl Rd. (By Appointment Only)
McAllen, TX, 78501

Liles Parker, PLLC

1100 NW LOOP 410 (By Appointment Only)
Suite 700
San Antonio, TX, 78213



DCActive 200107/06/2016
TXEligible To Practice In Texas 199308/17/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2015
Rated "Superb"AVVO2015
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2014
Rated "Superb"AVVO2014
"Top Lawyers in Washington, DC"The Legal Network2014
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2013
"Top Lawyers in Washington DC"The Legal Network2013
AVVO Rating of "Superb"AVVO2012
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale--Hubbell2012
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale--Hubbell2011
AVVO Rating of "Superb"AVVO2011
AVVO Rating of "Superb"AVVO2010
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2010
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2009
Legion of HonorOrder of DeMolay 2008
Named "Legal Editor" for the "Fraud and Abuse Answer Book"DecisionHealth2008
Achievement Award for Legal Service to AMBA MembersAmerican Medical Billing Association2008
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2008
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2007
Named Outside General CounselAmerican Medical Billing Association2006
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubell2005
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2005
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2004
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2003
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2002
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2001
Appreciation Award for Labor Law WorkU.S. Attorney's Office, SDTX2001
Named "Senior Litigation Counsel"U.S. Department of Justice2000
Director's Award (Agency's Highest Award - for HCF work)EOUSA, Dept. of Justice1998
Named "National Health Care Fraud Coordinator" EOUSA, Dept. of Justice1997
Work experience
TitleCompany nameDuration
PartnerLiles Parker, PLLC2006 - Present
PartnerMartyn Liles, PLLC2002 - 2006
Senior CounselJenkens & Gilchrist2001 - 2002
Deputy DirectorExecutive Office for U.S. Attorneys, Dept. of Justice1999 - 2000
National Health Care Fraud CoordinatorExecutive Office for U.S. Attorneys, Dept. of Justice1997 - 1999
Chief, Financial Litigation UnitU.S. Attorney's Office, Houston TX1995 - 1997
Asst. U.S. AttorneyU.S. Attorney's Office, Houston TX1994 - 1995
Association namePosition nameDuration
National Alliance of Medical Auditing SpecialistsMember2015 - Present
American Association of Professional CodersMember2012 - Present
Health Care Compliance AssociationMember2010 - Present
Christian Trial Lawyers AssociationMember2006 - Present
American Health Lawyers AssociationMember2001 - Present
District of Columbia BarMember2001 - Present
State Bar of TexasMember1993 - Present
Publication nameTitleDate
Journal of Diabetes Science and Technology"Legal and Regulatory Challenges Currently Facing Diabetes Treatment Provider and Related Durable Medical Equipment Suppliers"2013
CodingLine PRINT"Why HIPAA Privacy and Security are Becoming More Important Every Day"2012
Published by "Practice Management Institute"Certified Medical Compliance Officer (CMCO)®2011
Advocate MD Advisor Magazine"Are ZPICs Tougher than RACs when Conducting a Medicare Audit?"2011
Billing and Coding Advantage MagazineCover Story: “Face to Face with Robert Liles, Esq.” (Article Discusses Third-Party Billing Company Issues)2007
The Biggest Legal Mistakes Physicians Make"The 10 Biggest Mistakes Physicians Make When Handling Overpayments"2005
Journal of Health Care Compliance"When Should a Provider Disclose and What is the Impact?2002
CodingLine PrintHealth Privacy2001
School nameMajorDegreeGraduated
South Texas College of LawN/AJD - Juris Doctor1992
Trinity University, San Antonio TXHospital AdministrationMaster's in Hospital Administration1985
Trinity University, San Antonio TXMaster's in Business AdministrationM.B.A.1984
University of the SouthEconomicsB.A. in Economics1982
Speaking engagements
Conference nameTitleDate
State Medical Association -- Winter Conference"Physician Compliance Challenges – Regulatory Risks Areas to be Considered by Your Practice”2015
Private Duty Conference“Understanding HIPAA and other Privacy Issues Affecting Your Private Duty Agency"2015
PMI National Conference -- San Antonio, TX"Compliance and the Physician Practice: A Glimpse of the Future"2015
National Webinar"Don't Forget, The OIG Is Not the Only Game in Town!"2015
May 2015 Webinar“Using an Overseas Billing Company and /or Using the Cloud to Store Your Data: What are the Risks and Benefits of these Practices?”2015
Home Health Conference“Employment Law Issues Impacting Home Health Agencies"2015
Home Health Conference“Preparing and Responding to Various Medicare Claims Audits”2015
Doctor's at Renaissance Conference Center"South Texas Takedown -- How to Stay within the Four Corners of the Law"2015
APPNATop 10 Steps You Can Take to Improve Compliance and Stay Out of Trouble with the Government"2015
15th Annual National Medical Billing Conference"Provider Exclusions, HIPAA Changes and Legal Issues with ICD-10"2015
15th Annual National Medical Billing Conference"Compliance Report -- Concerns and Risks for Billers and Coders"2015
TAHCH Private Duty Conference“Risky Business. . . Avoiding Legal Pitfalls to Protect Your Business and Bottom Line"2014
Regulatory Educational Group Services"Top 10 Steps You Can Take to Improve Compliance and Stay Out of Trouble with the Government"2014
NSCHBC Annual Conference -- Puerto Rico“Be Careful Before Moving to Cloud Computing: A Contrarian View of the Inevitable”2014
NAMAS Annual Conference“Enhanced Provider Exclusion Rules and the Impact on Your Screening Obligations"2014
NAMAS Annual Conference“When to Disclose – Legal Obligations and Options"2014
NAMAS Annual Conference“Enhanced Provider Exclusion Rules and the Impact on Your Screening Obligations"2014
Fall Conference"Risky Business: Avoiding Program Integrity Pitfalls Currently Facing Your Health Care Practice "2014
2014 Webinar Series“Human Resource / Employee Relations Risks"2014
2014 AMBA Webinar Series“Identifying Risks and Modifying Your Compliance Plan to Take These Risks Into Account"2014
Rio Grande Valley Healthcare Fraud and Compliance Conference“Overview of Health Care Compliance and Relevant Statutory Provisions Now Facing South Texas Providers.”2013
Physician Practice Conference & Annual Business Meeting“Red Hot Compliance Update -- 2013”2013
Webinar"Social Media Concerns for Providers and Billers"2012
National Webinar -- January 6, 2012"HIPAA, HITECH and Emerging Risk Areas for 2012"2012
Fifth Annual Medical Coding Conference"Building an Effective Anesthesia Compliance Program"2012
Revenue Cycle Management 2011"Responding to Unannounced Audits"2011
PMI Annual ConferenceFederal Compliance Panel Addresses Compliance Risks2011
National Webinar -- December 7, 2011"Reading the Tea Leaves -- Issues of Concern Covered in HHS-OIG's 2012 Workplan2011
National WebinarReturning Overpayments to the Government2011
National Webinar"What to do When the Auditor Knocks"2011
CodingCon Summer 2011 Vegas: Medical Coding, Billing and National ConferenceImpact of Healthcare Reform on Healthcare Entities2011
Annual ConferenceThird-Party Billing Company Compliance Concerns2011
"Certified Medical Officer Course"Compliance Officer Certification -- Dallas, Texas2011
"Certified Medical Compliance Officer" CourseCompliance Officer Certification -- Las Vegas2011
"Certified Medical Compliance Officer" CourseCompliance Officer Certification -- San Diego2011
"Certified Medical Compliance Officer" CourseCompliance Officer Certification -- Alexandria, VA2011
Webinar: Health Care Reform and Third-Party BillersImpact of the Health Care Reform Act2010
South Texas Home Health ConferenceResponding to ZPIC Audits and Investigations2010
Practice Management Institute Annual ConferenceMedicaid Intregity Contractors: The Newest Challenge Faced by Providers2010
Annual ConferenceResponding to an Audit by Medicaid Integrity Contractor2010
Rocky Mountain AMBA WebinarCurrent Issues Facing Third-Party Billing Companies2009
Health Care Policy Conference -- Washington, DCOverview of Current Federal Enforcement Efforts2009
Annual Convention -- Las Vegas, NVMedicare Audits: How to Respond to a RAC Review2009
9th Annual AMBA National ConferenceRAC, PSC and ZPIC Audits -- How to Respond if Your Practice is Audited2009
21st Annual PAHCOM Conference -- Phoenix, AZCurrent Risks Faced by Physician Practices2009
2009 National Conference -- San Antonio, TXResponding to PSC and RAC Audits2009
2009 Medical Billing and User Conference -- Orlando, FLIssues Facing Third-Party Billing Companies2009
PMI Regional Conference -- Las Vegas, NVA New Breed CMS Auditor: PSCs and RACs2008
PMI Regional Conference -- Anaheim, CAA New Breed of CMS Contractors: PSCs and RACs2008
DecisionHealth Regional Conference -- Atlanta, GAKeynote Speaker: Post-Election Legislative Initiatives2008
DecisionHealth Regional Conference -- Atlanta, GAProvider-Vendor Relationships: How to Stay on the Right Side of the Red Line2008
DecisionHealth Fall Health Care Conference -- San Antonio, TXRACs and PSCs: Addressing Audits by CMS Contractors2008
CMHC Survival Strategies -- Houston, TXHow to Conduct an Internal Compliance Audit of Your Clinic2008
CMHC Survival Strategies -- Miami, FLHow to Respond if Your Clinic is the Subject of an Invesitgation2008
Central Illinois Chapter Meeting -- Chicago, ILIssues Facing Third-Party Companies2008
AMBA National Conference -- Las Vegas, NVRegulatory Compliance Concerns with Percentage-Based Billing Agreements2008
AMBA Central Texas Chapter Meeting -- Austin, TXIssues Facing Third-Party Billing Companies2008
Semmelweis Annual Conference -- Washington, DCHistory and Current Status of the False Claims Act2007
MAB Annual Convention -- Las Vegas, NVCompliance Violations and Penalties2007
AMBA Conference for Medical Office Professionals -- Largo, MDHealth Care Fraud: Audits and Investigations2007
Semmelweis Society Annual Conference -- Washington, DCBad Faith Peer Review Concerns2006
Prosecuting Chiropractic Fraud Cases -- Harrisburg, PAChiropractic Fraud Issues2006
MGMA Health Care Fraud Issues Faced by Medical Group Managers -- Washington, DCHealth Care Fraud Update2006
AMBA National Annual Conference -- Las Vegas, NVKeynote Speaker: Health Care Compliance2006
2006 Medical Practice Coding & Compliance SummitHealth Care Fraud: Issues and Concerns from a Legal Perspective2006
Intensive Session in Trial Advocacy SkillsTrial Advocacy Skills2003
Health PrivacyHIPAA Privacy: An Essential Element of an Effective Compliance Strategy2003
Handling Overpayments — Selected Issues and ConsiderationsOverpayment Issues2003
NITA Intensive Session in Trial Advocacy Skills -- Washington, DCTrial Advocacy Skills2002
How to Respond to a Federal Investigation of Your Hospital or Medical PracticeResponding to an Investigation of Your Practice2002
How To Respond to a Federal Investigation of Your CompanyResponding to Federal Investigations2002
Ohio Hospital Association: Member TeleconferenceNew Leadership: What to Expect from DOJ and HHS-OIG2001
Health Care Fraud Enforcement Issues and Considerations2001 Podiatric Coding & Practice Management Summit2001
Health Care Fraud Enforcement Efforts This Year and Beyond.Health Care Fraud Enforcement Efforts2001
Health Care Fraud Enforcement & Voluntary Disclosure ConsiderationsVoluntary Disclosure Issues2001
Annual Meeting: Legislative UpdatePharmaceutical Legislative Initiatives2001
Ukrainian Prosecutors and Interior Ministry of Interior Law Enforcement OfficialsCivil and Criminal Health Care Fraud Enforcement2000
Evaluator Team Leader TrainingPriority Prosecution Areas2000
ABA Health Care Fraud ConferenceHealth Care Fraud Review Panel2000
Midwest Regional Nursing Home Fraud and Abuse ConferenceModerator, Nursing Fraud and Abuse Enforcement Panel1999
FLTC: Basic Health Care Fraud Enforcement -- Glynco, GACivil & Criminal Health Care Fraud Statutes1999
Advanced health Care FraudQui Tams1999
National Level Health Care Fraud Working GroupFalse Claims Act and National Project Developments1998
EOUSA Civil Chiefs Seminar -- Columbia, SCUse of the False Claims Act in Civil Health Care Matters1998
Basic Affirmative Civil Enforcement SeminarUse of the False Claims Act1998
Texas Statewide Financial Litigation ConferenceHealth Care Fraud Collection Issues1997
Basic Health Care Fraud Prosecution Team TrainingInvestigative Techniques & Issues1997
Affirmative Civil EnforcementRole of Auditors & Investigators1997