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Our Corporate Team

Experience Brings Excellence

Our corporate leadership team manages MCNA's continuing growth throughout the United States. Combined, they have over 200 years of experience in patient care, financial administration and corporate compliance. Their commitment to service for Medicaid, CHIP and Medicare members is a core competency of MCNA.

We invite you to get to know our corporate leaders below:

Shannon Boggs-Turner, JD
Shannon Boggs-Turner, JD
Executive Vice President

Shannon Boggs-Turner serves as Executive Vice President for MCNA. Ms. Boggs-Turner is a proven executive with outstanding analytical skills and a wealth of experience in the management of both...

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Shannon Boggs-Turner serves as Executive Vice President for MCNA. Ms. Boggs-Turner is a proven executive with outstanding analytical skills and a wealth of experience in the management of both commercial and government sector health plans. While serving as Medicaid Commissioner for the Commonwealth of Kentucky, she received CMS approval for the first Deficit Reduction Act Medicaid Reform Plan in the nation. She has also served as the Executive Vice President for University Health Care, Inc., a provider-sponsored MCO with Medicaid and Medicare lines of business. During her tenure the plan was consistently ranked in the NCQA's Top 20 Medicaid Health Plans in America. Ms. Boggs-Turner's skills in the analysis and implementation of state and federal regulations help to ensure that MCNA's operational focus remains aligned with the evolving needs and requirements of each of the company's state partners.

Mayre Herring Thompson, MHSA, CHC
Mayre Herring Thompson, MHSA, CHC
Chief Compliance and Privacy Officer

Mayre Herring Thompson serves as Chief Compliance Officer for MCNA. Ms. Herring Thompson oversees MCNA's Compliance and HIPAA programs, including all regulatory compliance activities. She serves...

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Mayre Herring Thompson serves as Chief Compliance Officer for MCNA. Ms. Herring Thompson oversees MCNA's Compliance and HIPAA programs, including all regulatory compliance activities. She serves as a key point of contact with state partners. As a former regulator with Florida Medicaid, she monitored managed care plans for contract compliance and successfully participated in NCQA, URAC, and AAAHC accreditation surveys. Her experience with the Bureau of Managed Care at the Florida Agency for Health Care Administration serves as the basis for her focus on maintaining ongoing positive working relationships with state regulators. At MCNA, Ms. Herring-Thompson utilizes a results-oriented approach to ensuring all contract requirements are met that entails the proactive identification of potential compliance and privacy issues. She also oversees MCNA's URAC Claims Processing and Dental Plan Accreditation processes.

DeDe Davis
DeDe Davis
Vice President of Dental Management and Quality Improvement

DeDe Davis is a proven executive with a diverse background in clinical and non-clinical health care operations across Medicaid, Medicare, and commercial lines of business. As Vice President of...

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DeDe Davis is a proven executive with a diverse background in clinical and non-clinical health care operations across Medicaid, Medicare, and commercial lines of business. As Vice President of Dental Management and Quality Improvement, she operates in partnership with the Chief Dental Officers to implement and oversee MCNA's Utilization Management and Quality Improvement programs. While serving in the US Navy, Ms. Davis began her career in health care management and operations with Anthem Blue Cross and Blue Shield. She has also served as an executive responsible for health plan operations with the Amerihealth Mercy family of companies. Before joining MCNA's executive team, Ms. Davis was Vice President of Clinical and Medicare Operations for ikaSystems where she led the development of a comprehensive suite of medical and risk management technology products, including development and implementation of a base Medicare claims product. Her impressive track record demonstrates her abilities in connecting with clients, and leading the design and implementation of programs that result in statistically significant improvement in both clinical and operational outcomes within managed care plans.

Linda Altenhoff, DDS
Linda Altenhoff, DDS
Vice President of Program Integrity

Dr. Linda Altenhoff serves as the Vice President of Program Integrity for MCNA. Dr. Altenhoff is the former Chief Dental Officer for the Texas Health and Human Services Commission, Office of...

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Dr. Linda Altenhoff serves as the Vice President of Program Integrity for MCNA. Dr. Altenhoff is the former Chief Dental Officer for the Texas Health and Human Services Commission, Office of Inspector General and has held several leadership positions in national professional organizations including President of the Medicaid/Medicare/CHIP State Dental Association (MSDA) and member of the Board of Directors of the Association of State and Territorial Dental Directors (ASTDD). A Texas licensed general dentist, she has over 30 years of professional experience as a dental practitioner, a nationally recognized lecturer, and a leader in the oversight of Medicaid and CHIP oral health programs. Dr. Altenhoff provides expert oversight of MCNA's Special Investigation Unit as it carries out targeted fraud and abuse detection activities in conjunction with state partners and the Office of Inspector General.

René Canales
René Canales
Vice President of Network Development and Provider Engagement

René Canales serves as Vice President of Network Development and Provider Engagement for MCNA. René is an accomplished professional in all areas of Medicaid, CHIP, and Medicare Advantage...

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René Canales serves as Vice President of Network Development and Provider Engagement for MCNA. René is an accomplished professional in all areas of Medicaid, CHIP, and Medicare Advantage contracting, including provider relations, claims processing, and customer service. René began his career building provider networks in Texas and California before enlarging his scope with Metlife to oversee successful expansion in 14 states. He has also served as Compliance Officer with Premier Access Insurance Co. where he oversaw all compliance activities including the development of key internal policies relating to state and federal laws governing both commercial and government programs. As Vice President of Network Development and Provider Engagement, René oversees a staff a of highly trained network development professionals and continually looks for process improvements to simplify the provider experience and increase satisfaction with MCNA's services. He regularly collaborates with Executive leadership in all operational areas to guide MCNA's network development strategy across the country and ensure continuing focus on the "voice" of the provider.

Colleen Grace
Colleen Grace
Associate Vice President of Operations

Colleen Grace serves as Associate Vice President of Operations for MCNA. Ms. Grace has over 30 years of Medicaid operations experience, including leadership of major, large-scale managed care...

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Colleen Grace serves as Associate Vice President of Operations for MCNA. Ms. Grace has over 30 years of Medicaid operations experience, including leadership of major, large-scale managed care expansions and ongoing oversight of health and dental plans in the State of Texas. While leading the Health Plan Management section of the Texas Health and Human Service Commission she was instrumental in the development of policies that guided contract monitoring activities and drove collaborative working relationships with the state, health and dental plan leaders, stakeholders, associations, and legislative staff. Ms. Grace also served as the Director of Health Plan Operations with the Texas Association of Health Plans, a role in which she established best practices for health plans to accommodate planned change and facilitated Medicaid and CHIP operational forums. She uses her extensive knowledge of Texas Medicaid and CHIP program requirements to ensure the timely delivery of key business objectives and collaborates closely with MCNA's cross-functional teams to implement strategic initiatives designed to maximize the quality of services provided to our members, providers, and our valued state partners.

Thomas Isbell, DDS
Thomas Isbell, DDS
Executive Dental Director, Arkansas

Dr. Thomas Isbell serves as MCNA's Arkansas Executive Dental Director. Dr. Isbell earned his Doctor of Dental Surgery from the University of Tennessee College of Dentistry, and is a Fellow of the...

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Dr. Thomas Isbell serves as MCNA's Arkansas Executive Dental Director. Dr. Isbell earned his Doctor of Dental Surgery from the University of Tennessee College of Dentistry, and is a Fellow of the Academy of General Dentistry. A dental provider serving Medicaid patients in Arkansas for 45 years, Dr. Isbell provides expert insight into the state's evolving Medicaid program and serves as a critical link with the professional dental community. In 2017, he received the Distinguished Service Award from the Arkansas State Dental Association. He is a former President of the Arkansas Academy of General Dentistry and the Northeast Arkansas Dental Society. Dr. Isbell is a proponent of lifelong continuing education and the promotion of high quality dentistry in rural areas where children and adults may face greater challenges to access. As MCNA's Arkansas Dental Director, Dr. Isbell provides expert leadership for our team of Clinical Reviewers and serves as an invaluable resource to our Arkansas network providers.

David McKeon, DDS
David McKeon, DDS
Executive Director, Louisiana

Dr. David McKeon serves as MCNA's Louisiana Executive Director. His experience as a clinical professor with the Louisiana State University (LSU) School of Dentistry and in private practice in...

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Dr. David McKeon serves as MCNA's Louisiana Executive Director. His experience as a clinical professor with the Louisiana State University (LSU) School of Dentistry and in private practice in Louisiana provides Dr. McKeon with a high level of technical knowledge and an innate cultural understanding. This valuable experience allows MCNA to better meet the oral health care needs of the state's Medicaid population. He is the former Director of the Dental Health Resources Dental Authorization Unit at LSU, a position in which he also served as the Dental Director for the Louisiana Department of Health and Hospitals (DHH). Dr. McKeon's expertise in connection with the Louisiana Medicaid Program and the DHH ensure that MCNA is an efficient and highly responsive partner to the state.

Michael Giorlando, DDS
Michael Giorlando, DDS
Dental Director, Louisiana

Dr. Michael Giorlando serves as MCNA's Louisiana Dental Director. Dr. Giorlando is a graduate of the Louisiana State University School of Dentistry. After graduation, he served as a dental...

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Dr. Michael Giorlando serves as MCNA's Louisiana Dental Director. Dr. Giorlando is a graduate of the Louisiana State University School of Dentistry. After graduation, he served as a dental instructor of dental lab technology and as an assistant clinical professor at the LSU School of Dentistry Oral Medicine and Radiology Department from 1984 to 1992. In addition to his work with LSU School of Dentistry, Dr. Giorlando maintained a private general dental practice in New Orleans. His clinical experience paired with his executive administrative skills and team level management allow him to effectively communicate with MCNA's state partners and the Louisiana professional dental community. As MCNA's Dental Director, Dr. Giorlando provides oversight for and management of the company's Clinical Reviewers, which are the initial point of contact for dentists across the state. This collaborative relationship promotes MCNA's goal of assuring that Medicaid recipients are provided with quality, medically necessary dental care and services.

Scott Wieting, DDS
Scott Wieting, DDS
Executive Director, Nebraska

Dr. Scott Wieting serves as MCNA's Nebraska Executive Director. Dr. Wieting is a graduate of the University of Nebraska Medical Center College of Dentistry and has practiced in Nebraska for over...

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Dr. Scott Wieting serves as MCNA's Nebraska Executive Director. Dr. Wieting is a graduate of the University of Nebraska Medical Center College of Dentistry and has practiced in Nebraska for over 38 years. Throughout his career, he has dedicated his time and energy fulfilling leadership roles within the professional dental community. He is a former President of the Nebraska Dental Association, and currently serves as a Nebraska Delegate to the American Dental Association. He is also a member of the Nebraska Dental Association Legislative Committee. As Board Dentist for the Four Corners Board of Health, he takes an active interest in the overall health of the community. Dr. Wieting oversees all Nebraska program operations and, as MCNA's primary liaison with our state partner, ensures the appropriate coordination of all resources.

Robert E. Roesch, DDS, MAGD
Robert E. Roesch, DDS, MAGD
Dental Director, Nebraska

Dr. Robert Roesch serves as MCNA's Nebraska Dental Director. An inductee in the Nebraska Dental Association Hall of Fame, Dr. Roesch is a dynamic proponent of the dental profession who serves as a...

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Dr. Robert Roesch serves as MCNA's Nebraska Dental Director. An inductee in the Nebraska Dental Association Hall of Fame, Dr. Roesch is a dynamic proponent of the dental profession who serves as a voice for his fellow dentists through his expansive involvement in state and national professional dental organizations. He is a former President of the Nebraska Dental Association and the Nebraska Academy of General Dentistry, and he served for six years as the Speaker of the House of Delegates for the Academy of General Dentistry. He currently continues his service to the dental community as the Legislative Chair of the Nebraska Academy of General Dentistry. As MCNA's Nebraska Dental Director, Dr. Roesch provides expert guidance to our team of Clinical Reviewers and comprehensive oversight of the utilization management activities of the plan.

Barney Olsen, DDS, MS
Barney Olsen, DDS, MS
Dental Director, Utah

Dr. Barney Olsen serves as one of MCNA's Utah Dental Directors. Dr. Olsen, a board certified Pediatric Dentist, is a Diplomate of the American Board of Orthodontists and Fellow of the American...

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Dr. Barney Olsen serves as one of MCNA's Utah Dental Directors. Dr. Olsen, a board certified Pediatric Dentist, is a Diplomate of the American Board of Orthodontists and Fellow of the American College of Dentists. He earned his Doctor of Dental Surgery degree at the University of Texas Health Science Center at Houston School of Dentistry. Since 1994, he has operated a private practice providing comprehensive orthodontic and pediatric dental care and preventive services for children and adolescents in Utah. Additionally, Dr. Olsen is committed to excellence in higher education and the advancement of the dental profession. He is a staff dentist with the Primary Children's Medical Center in Salt Lake City, where he serves as an instructor for pediatric dental residents. Dr. Olsen is also an adjunct assistant professor at the University of Utah, teaching in the GPR Program for the School of Medicine and teaching dental ethics for the School of Dentistry. As an MCNA Dental Director for the State of Utah, Dr. Olsen helps to oversee all utilization management functions and MCNA's team of Clinical Reviewers.

David Stewart, DDS, MS
David Stewart, DDS, MS
Dental Director, Utah

Dr. David Stewart, a Diplomate of the American Board of Pediatric Dentistry, serves as one of MCNA's Utah Dental Directors. Dr. Stewart is a graduate of the University of Iowa College of Dentistry...

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Dr. David Stewart, a Diplomate of the American Board of Pediatric Dentistry, serves as one of MCNA's Utah Dental Directors. Dr. Stewart is a graduate of the University of Iowa College of Dentistry and completed his Certificate of Pediatric Dentistry at the Primary Children's Medical Center in Salt Lake City. Prior to pursuing his dental degree, he earned dual Masters Degrees in Public Health and Health Services Administration from the University of Utah. Dr. Stewart is currently an Assistant Professor at The College of Dental Medicine at Roseman University of Health Sciences, a role in which he focuses on standardizing pediatric didactic and clinical core content. He has also served as an attending Pediatric Dentist at the Primary Children's Medical Center since 2002, overseeing the clinical activities of the dental residents in the Pediatric Dental Residency Program. As an integral part of MCNA's leadership team in the State of Utah, Dr. Stewart helps lead our Utah-based team to ensure our members receive high quality preventive dental care and services.