Find a pathologist

Using the most advanced pathology technology, our pathologists deliver the highest quality state-of-the-art analysis and consultation. Find a pathologist among our diverse group of board-certified anatomic pathologists and clinical pathologists, regardless of where they live.

To request a pathologist consult, please call us at 888.838.4636.

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Michelle Plier
DVM, Diplomate ACVP
Clinical Pathology
University

University of California, Davis, North Carolina State University, University of Wisconsin, Madison

Bio

Michelle received her DVM degree from the University of California, Davis in 1991. After a private practice internship, she pursued a residency and instructorship in clinical pathology at North Carolina State University and the University of Wisconsin – Madison, respectively. She worked with other commercial and academic clinical pathology laboratories before joining ANTECH. She also teaches in the Western University clinical pathology rotation and instructs residents from other disciplines rotating through the laboratory. Michelle enjoys cytology, hematology, and large animal and avian/exotics cases.

To request a pathologist consult, please call us at 888.838.4636.

Melissa Popielarczyk
DVM, MS, Diplomate ACVP
Anatomic Pathology
University

University of Florida, Purdue University, Western University of Health Sciences

Bio

Melissa is a 1993 graduate of the University of Florida, College of Veterinary Medicine. During her DVM studies, she worked as a biological scientist in the Dept. of Comparative and Experimental Pathology, where she developed an interest in pursuing a career in pathology. She worked for 2 years as an associate veterinarian in a small animal and avian practice in Palm Bay, Florida prior to completing an Anatomic Pathology Residency at Purdue University, where she also earned a master’s degree. She completed her board certification in 2001 and is a diplomate of the American College of Veterinary Pathologists in Anatomic Pathology. Melissa is a member of the AVMA, Charles Louis Davis, D.V.M. Foundation and the ACVP. Her interest is general surgical pathology and she enjoys both large and small animal cases. Melissa joined ANTECH in 2003 as a staff pathologist at the NY Laboratory in Lake Success. She resides in Clifton Park, NY with her husband, two boys, ages 18 and 15, and her rescue dog, Eli.

To request a pathologist consult, please call us at 888.838.4636.

Barb Powers
DVM, PhD, Diplomate ACVP
Anatomic Pathology
University

Purdue University, Colorado State University

Bio

Barb graduated from Purdue University with her DVM in 1981. She then did a one year small animal internship at Colorado State University, and subsequently completed her pathology residency and PhD in 1986, becoming ACVP board certified in 1987. Barb then joined CSU’s Animal Cancer Center as pathologist and researcher in cancer and radiation pathology for 10 years. In 1996 she became Director of CSU’s Veterinary Diagnostic Laboratories, serving in that position for 22 years. She was president of Colorado Veterinary Medical Association from 2003-2004 and president of the American Association of Veterinary Laboratory Diagnosticians (AAVLD) from 2006-2007. She served on AAVLD’s Accreditation Committee from 1998-2010. At CSU, she and her colleagues validated an ELISA for Chronic Wasting Disease (CWD) in cervids and established one of the country’s largest CWD testing centers. She cochaired the committee on the National Animal Health Laboratory Network from 2008-2018, helping to secure federal funding. Barb has authored or co-authored over 210 publications, mostly related to small animal oncology, radiation pathology or orthopedic pathology. Barb joined ANTECH in 2018. Her areas of interest are oncologic pathology, equine endometrial pathology, oral pathology and orthopedic pathology. In her free time Barb enjoys spending time in her mountain log home that her husband built, spending time with her dogs, Summer and Tango, hiking, and gardening.

To request a pathologist consult, please call us at 888.838.4636.

Rose Ranck
DVM, Diplomate ACVP
Anatomic Pathology
University

Michigan State University, North Carolina State University

Bio

Rose earned her DVM in 2004 from Michigan State University. During vet school, she discovered her love of pathology while working as a student technician at the MSU Diagnostic Center for Population and Animal Health. She then relocated to North Carolina for residency training in anatomic pathology at North Carolina State University, and earned her board certification in 2007. Rose is a member of the American College of Veterinary Pathologists, American Veterinary Medical Association, and the International Society of Veterinary Dermatology. Her areas of particular interest are dermatology and oncology. Rose joined ANTECH in 2007 and works at the Durham NC location. When not reading biopsies, she enjoys traveling (especially to our country’s national parks), hiking, and following her favorite sports teams: the Michigan State Spartans, Cleveland Indians, and Carolina Hurricanes.

To request a pathologist consult, please call us at 888.838.4636.

Lon J. Rich
DVM, PhD, Diplomate ACVP
Clinical Pathology
University

University of California, Davis, Cornell University

Bio

Lon is a 1964 graduate of University of California, Davis. He completed his PhD and clinical pathology residency training at Cornell University. Lon earned Diplomate status in 1973, the inaugural certification class in the specialty of clinical pathology within the ACVP. Lon is member of the AVMA, CVMA, SCVMA, ACVP, and ASVCP. Lon founded Professional Animal Laboratories (PAL), later partnering with VCA ANTECH, Inc., laying the foundation for what was to become ANTECH West. With ANTECH, Lon has held several leadership roles, including past Chief Medical Officer of ANTECH West. He resides in Irvine, CA, with his spouse, and enjoys antique collecting, mountain hiking, fly-fishing in Idaho and Montana, and handyman projects.

To request a pathologist consult, please call us at 888.838.4636.

Bill Ruehl
VMD, PhD, Diplomate ACVP
Clinical Pathology
University

University of Pennsylvania, University of California, Davis, Stanford University

Bio

Bill is a 1979 graduate of the University of Pennsylvania, where he completed a small animal internship the following year. Wasting no time, the next day he moved to beautiful California, and has spent the majority of his career there. Bill completed a Clinical Pathology residency at University of California, Davis, completing board certification in 1985. Following his PhD studies, Bill was appointed Assistant Professor in the Departments of Pathology and Comparative Medicine at Stanford University School of Medicine, where he was Director of the (Veterinary) Clinical Laboratories, and conducted research and teaching. Bill joined ANTECH in early 2001, reads cytologies and provides clinical pathology consultation. He has previously managed ANTECH’s San Jose laboratory and was instrumental in opening two additional Northern California laboratories. Bill has contributed to several dozen papers and book chapters in veterinary medicine and basic science areas as an author, coauthor and editor. He also authored more than a dozen patents in the United States and other countries, as well as several pharmaceutical approvals issued by the US Food and Drug Administration, and by analogous pharmaceutical regulatory agencies abroad. In his spare, time Bill continues to interact informally with University of California, Davis veterinary faculty, teaches occasionally and enjoys reading, hiking, inline skating and other sporting activities. Bill’s son attends engineering college and his daughter attends veterinary school (sometimes the acorn doesn’t fall far from the oak tree!).

To request a pathologist consult, please call us at 888.838.4636.

Byron F. Ruiz
DVM
Anatomic Pathology
University

University of San Carlos, University of Chile, University of Pennsylvania

Bio

Dr. Ruiz brings over 30 years’ experience to his work at ANTECH. He received his DVM from the University of San Carlos in Guatemala City, where he subsequently was in private practice and taught pathology in the veterinary school. In 1983, Byron did a postdoctoral study in pathology at the University of Chile in Santiago, on a scholarship from the Organization of American States. In the US, Byron completed a Pathology Residency at the University of Pennsylvania School of Veterinary Medicine, and received the C.L. Davis Veterinary Pathology Award. In 1992, he came to North Carolina to work for Labcorp-Roche Biomedical Corporation. Byron has been with ANTECH since 1998. Byron has worked at the Bronx Zoo, the University of Pennsylvania, and the University of Connecticut, and has maintained his clinical veterinary license in Guatemala. In 2008, Dr. Ruiz was recognized at the annual Consejo Nacional de Ciencia y Tecnologìa Converciencia by the government of Guatemala for his work in veterinary science. His interests are in oncology, and exotic and avian pathology. He lives in Durham, NC, with his wife, Sandy, a clinical social worker, and his cat, Amber. He enjoys running, travel, and playing with his new grandson.

To request a pathologist consult, please call us at 888.838.4636.

Melissa D. Sánchez
VMD, PhD, Diplomate ACVP
Anatomic Pathology
University

University of Pennsylvania

Bio

Melissa is a graduate of the Veterinary Medical Scientist Training Program (VMSTP, VMD/PhD program) at the University of Pennsylvania (UPenn). She completed a PhD in Virology/Cell and Molecular Biology focusing on the antibody immune response against West Nile virus in horses. Following the VMD/PhD, she embarked in an Anatomic Pathology residency at UPenn. During her residency she was awarded the Pfizer/Ricardo Ochoa Minority Fellowship granted by the American College of Veterinary Pathologists/Society of Toxicologic Pathology Coalition for Veterinary Pathology Fellows. Upon successful completion of the residency and boards, she served as a faculty member in the Department of Pathobiology at the School of Veterinary Medicine at UPenn, where she served as chief of the small animal autopsy and immunohistochemistry services. Her clinical and research interests include oral pathology and neuropathology. She has led diagnostic pathology studies, primarily in the area of oral pathology. Melissa joined ANTECH in 2016, and is the Chair of the Antech Oral Pathology Specialty Service. She is also a member of the International Society of Veterinary Dermatology (ISVD) and Clinical Associate Professor at Western University of Health Sciences/College of Veterinary Medicine.

To request a pathologist consult, please call us at 888.838.4636.

Tiffany Scanlon
VMD, Diplomate ACVP
Anatomic Pathology
University

Brown University, University of Pennsylvania

Bio

Tiffany grew up in the Philadelphia area. She received an undergraduate degree in English from Brown University and graduated from the University of Pennsylvania School of Veterinary Medicine in 2001. After graduation she worked for two years as an equine practitioner seeing a mixture of pleasure and performance horses, including Thoroughbred and Standardbred race horses in Pennsylvania, Delaware, and Maryland. After deciding to pursue a career as a pathologist, she returned to Penn for her residency, and stayed on as lecturer in the pathobiology department until signing on with ANTECH’s Baltimore branch in the fall of 2007. Tiffany is a member of the ACVP and a clinical professor of veterinary medicine, Western University of the Health Sciences. Her interests include ocular pathology and equine pathology. An avid open water long distance swimmer and thoroughbred racing fan, she lives in southern California with her cockapoos Harrison and Finnegan. She also enjoys bikram yoga, spending time in her mountain cabin, and weight lifting.

To request a pathologist consult, please call us at 888.838.4636.

Chris A. Schiller
DVM, Diplomate ACVP
Anatomic Pathology
University

University of Tennessee, Stanford University

Bio

Dr. Schiller received her undergraduate degree in zoology in 1980 and her DVM degree in 1985 from the University of Tennessee. She practiced equine ambulatory medicine for two years before completing postdoctoral training at Stanford University in the Department of Lab Animal Medicine and a pathology residency at the National Zoological Park in conjunction with the Armed Forces of Pathology. She became board certified in anatomic pathology in 1993. She has expertise in exotic companion animal pathology and zoo animal pathology as well as lab animal pathology. Additional areas of interest include pathology of the GI tract, liver and oncologic pathology. Dr. Schiller is married to Dr. Grant Rezabek who is an anatomic pathologist at Oklahoma State University State Diagnostic Laboratory and also consults as an equine and large animal pathology specialist for ANTECH. Drs. Schiller and Rezabek live with their five Boston terriers in Stillwater, OK. The “Schiller-Rezabek” ranch in Stillwater breeds and raises cutting horses, averaging three foals a year with three to six horses in full-time cutting training. Dr. Schiller enjoys riding and showing cutting horses and has “the trophy buckles” to show her success including a personal best with her first homebred horse to show “Pablo”, finishing sixth at the 2014 NCHA futurity (out of 380 horses) and a championship at the Abilene Spectacular, January 2015.

To request a pathologist consult, please call us at 888.838.4636.

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