Samuel Smith, M.D., Medical Director
Dr. Samuel Smith joined Associated Pathologists in 1978 and became the Medical Director of PathGroup Labs at its inception. He has over 20 years of hospital and independent laboratory Medical Director experience. He is a member of numerous medical societies and professional organizations including Tennessee Medical Association, Nashville Academy of Medicine and the American Society for Clinical Pathology. He received his M.D. at University of Louisville in 1973.

Terry Casey, M.D., Medical Director
Dr. Casey has been with Associated Pathologists since 1998 and currently serves as a Managing Member of the group and Medical Director of PathGroup Nashville’s Anatomic Pathology Laboratory. Born in New Orleans, Dr. Casey attended Tulane University School of Medicine where he attained his M.D. in 1981. His postgraduate training occurred in the Department of Pathology at Vanderbilt University Medical Center. Dr. Casey is Board certified in Anatomic and Clinical Pathology with Hematology Subspecialty Certification.

Vladimir Kravtsov, Ph.D, M.D.
Medical Director, Molecular Pathology and Flow Cytometry, Board Certified in Clinical Pathology & Hematopathology 
Dr. Kravtsov earned his M.D. degree at the Kuban State Medical Institute in Russia and went on to receive his Ph.D. degree in Philosophy in Medicine from Leningrad Institute of Experimental Medicine. Dr. Kravtsov completed his Residency training in Pathology and Fellowship in Hematology at Vanderbilt University and his Clinical Fellowship in Hematopathology at the University of Washington in Seattle, WA. He has served as a Senior Scientist at Tel Aviv University, Assistant Professor of Medicine in Hematology and Oncology at Vanderbilt University and Medical Director and Chief Hematopathologist of DiaTech Oncology in Montreal. Dr. Kravtsov authors several patents in the area of Medicine and more than 50 publications in scientific journals. He is a Fellow of the College of American Pathologists and an active member of the American Medical Association, American Society of Hematology and Clinical Cytometry Society.

Ludmila Matyakhina, Ph.D, FACMG
Director Clinical Cytogenetics
Dr. Matyakhina brings over 25 years of Cytogenetics expertise to our organization including over 20 years of research with over 50 publications. She has her master of science’s degree in Cytology and Genetics from Novosibirsk State University and her Ph.D. in Genetics from Institute of Cytology and Genetics, Russia. She served as a Fellow at the National Institutes of Health with subsequent positions at Georgetown University Hospital and Quest Diagnostics Nichols Institute. Dr. Matyakhina is board certified by the American Board of Medical Genetics (ABMG) in Clinical Cytogenetics after training in the Metropolitan Washington, D.C. Medical Genetics Fellowship Program.  She has extensive expertise in many areas of Cytogenetics with a primary interest in Cancer and Molecular Cytogenetics.

James L. Prescott Ph.D.
Molecular Diagnostics Director
Dr. Prescott joined PathGroup Labs in 2008. He has a Ph.D. in Molecular Biology and has nearly 20 years of Molecular Biology experience, including 10 years of Molecular Diagnostics experience. Dr. Prescott is Board certified by the American Board of Bioanalysis (ABB) as a High Complexity Clinical Laboratory Director (HCLD) in Molecular Diagnostics. He received his Ph.D. from the Mayo Graduate School in 1997, and a Bachelor of Science degree in Biochemistry from Cal Poly in San Luis Obispo in 1986. Prior to coming to PathGroup Labs, Dr. Prescott was the Molecular Development Manager for Carilion Consolidated Labs, Molecular Operations Manager for Innovative Pathology Services, and a Senior Scientist for LabCorp, Dianon Systems and UroCor.

Dewayne Belew
Assistant Vice President-Laboratory Operations
Mr. Belew joined PathGroup in October of 2005. Prior to joining PathGroup, Dewayne spent 22 years in Hospital Administration, Healthcare Marketing, Public Relations and Fundraising. He also taught Marketing, Advertising, and Public Relations for nine years as an Adjunct Professor at Lee University in Cleveland, Tennessee. Dewayne earned his B.S. degree at Middle Tennessee State University and his Master of Science Degree at the University of Tennessee in Knoxville. Dwayne manages PathGroup's operations in Chattanooga, Knoxville, Johnson City, TN and Virginia.

Vickie Clinard, MS, MT (ASCP)
Microbiology and DNA Manager
Ms. Clinard joined PathGroup Labs in July of 2003. Vickie has over 20 years of experience in Clinical Microbiology and Molecular Diagnostics while working for the Tennessee Department of Health and major academic and non-academic hospitals. She earned her BA and Masters in Health Care Administration from the University of Tennessee.

Ken DeGraff
Director of Project Administration
Mr. DeGraff joined PathGroup in May of 2000. He has over 30 years of business experience in a variety of industries. He joined PathGroup as the in-house Software Trainer and Supporter and was promoted to I.T. Director in December of 2004. He is responsible for assisting PathGroup’s project owners to document, organize and track projects. Ken has a B.S. in Business Administration and is a CPA (Certified Public Accountant).

Randy Flesher
Assistant Vice President-Anatomic Laboratory Operations, RT (CSMLS) and HT (ASCAP)
Mr. Flesher joined PathGroup in 2004 as the Histology Supervisor. Although formally trained as a Medical Technologist, Randy has been working in the Anatomic Pathology field for 15 years. As Anatomic Operations Manager, he oversees operations in the Histology, Cytology, Flow Cytometry, and Clinical Cytogenetics departments. He recently completed an M.B.A. with a focus in Health Care Management.

Jeffrey W. Johnson
Clinical Operations Manager /Clinical Compliance Officer
Mr. Johnson joined the company November, 2005. He was formally supervisor of the clinical lab at HCA Horizon Medical Center from 2000 to 2005. Mr. Johnson received his B.S. in Medical Technology at Austin Peay University in 1993.

Debbie Stinnett
Assistant Vice President-Laboratory Operations, MT (AMT)
Ms. Stinnett joined PathGroup in June of 1997. She has 25 years of experience in a variety of laboratory environments with technical experience in Flow Cytometry, Molecular, Anatomic and Clinical areas. As Operations Manager, Debbie is currently responsible for many of the pre-analytic processes of our laboratory to include Client Services, Medical Data Integrity (MDI), Transportation, Supply and Accessioning.

Dan Apple
Senior Vice President–Laboratory Operations
Mr. Apple joined PathGroup in 2005. With over 30 years of business experience and 25 years in healthcare, he previously served as Senior Vice-President–Operations in the Central Division of LabCorp, a national independent clinical laboratory.