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 1-888-838-4636.

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Penny K. Patten
DVM, Diplomate ACVP
Clinical Pathology
University

Oklahoma State University

Bio

Penny completed both her DVM studies (2003) and clinical pathology residency training at Oklahoma State University, successfully completing her board certification exam in 2006. Penny joined ANTECH in 2006, and is located in a full service diagnostic facility in Dallas, TX. Penny is a member of the AVMA, ACVP, and ASVCP where she participates in the outreach committee, assisting with the society’s Facebook page, intended as a forum for all veterinarians with an interest in clinical pathology. Professionally, she enjoys cytology and hematology encompassing a wide variety of species including exotic, wildlife, production, and zoo animals. Away from work, Penny enjoys camping, hiking, and exploring national parks with her husband. She also loves knitting, cooking, and playing guitar.

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

Alana Pavuk
DVM, MS, Diplomate ACVP
Anatomic Pathology
University

North Carolina State University, Colorado State University

Bio

Alana earned her DVM from North Carolina State University in 2009, and practiced small animal medicine in North Carolina for one year prior to pursuing a pathology residency at Colorado State University. She also received a Master’s degree from Colorado State University for her work investigating a potential genetic predisposition for high-grade mast cell tumors in Chinese Shar-Pei dogs. She became board certified in 2013, and started working for ANTECH in 2014, while continuing as a small animal practitioner. She is no longer in private practice, but still maintains the perspective of a practicing veterinarian through her diagnostic work. Alana is a member of the ACVP, as well as a contributing member of the Mast Cell Tumor Subgroup of the Veterinary Cancer Society’s OncologyPathology Working Group. Her interests include oncopathology, especially mast cell tumors, oral tumors, and digital tumors, and respiratory pathology. Alana currently resides in Hillsborough, NC, with her husband, daughter, and one cat, Sawyer. Outside of professional pursuits, Alana enjoys hiking, Pilates, and above all, trail running through the mountains.

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

Don Petersen
VMD, Diplomate ACVP
Clinical Pathology
University

University of Pennsylvania, Kansas State University

Bio

After earning his VMD at the University of Pennsylvania in 1999, Don worked in small animal and exotics private practice in southern California, and Oregon. In 2008, he began a clinical pathology residency at Kansas State University, and completed board certification in 2011. Don resides in Portland with his wife, two children, three cats (Tiki, Ronde, and Mama cat) and one dog (Belle). In his free time, he enjoys surfing, biking, and hiking. He also puts his years of practice experience to good use volunteering with the Feral Cat Coalition of Oregon.

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

Ida Piperisova
DVM, Diplomate ACVP
Clinical Pathology
University

Veterinary and Pharmaceutical University Brno, Kansas State University, North Carolina State University

Bio

Ida completed her DVM studies in her home country of Czech Republic, graduating from the Veterinary and Pharmaceutical University Brno in 2004, and remaining there for postgraduate studies in anesthesiology. In 2006 Ida crossed the Atlantic, accepting a research assistantship in Immunohistochemistry at Kansas State University, before relocating to North Carolina State University in 2007 for residency training in Clinical Pathology. She has published on a variety of topics including innovations in veterinary student instruction and parasitic infections. She is a member of both the ASVCP and ACVP, where she has served on the Quality Assurance and Standards Committee. She is also a reviewer for both JAVMA and AJVR. She holds a masters certificate in health care leadership from Cornell University. Cytology, bone marrow evaluation, and quality control are areas of particularly interest to Ida. Upon completing her certification exam in 2010, Ida joined the ANTECH group in Lake Success, NY. She has embraced her new home in the Big Apple, and has become a committed NY Rangers fan. She resides with her very loud rescued domestic shorthair cat, Pidiha, and enjoys travel, cycling, hiking, snowshoeing, cooking, and good food and wine.

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

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.

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