Associated Pathologists, LLC d/b/a PathGroup, is the largest physician owned pathology group in the United States. With more than 175 pathologists, we provide a wide range of anatomic, clinical and molecular services to hospitals, multi-speciality groups, surgery centers, physician offices and other clinical reference laboratories, and have done so since 1965. Associated Pathologists is an academic style group practice that has superb range and depth of experience, expertise and certifications in all subspecialty areas of pathology.

Physician Leadership

Derek C. Welch, MD, FCAP

President, Associated Pathologists, Chief Medical Officer
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Richard B. Hessler, MD

Vice President of Physician Services & Chief of Pathology, Erlanger Health System
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Pranil K. Chandra, DO, FCAP, FASCP

Senior Vice President, Chief Genomics Officer
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Marigny B. Roberts, MD

Senior Vice President Health Systems, Hospital Operations and Physician Services
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Ryan M. Jones, MD

Vice President of Physician Services
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Kathryn Knight, MD

Senior Advisor
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Expert Pathologists

Bijan Amirghassemi, MD

S. Jaweed Ansari, MD

Michael I. Argyres, MD

Charles H. Aust, Jr., MD

Joshua Baalwa, MD, PhD

Jaya Bajaj, MD, MHA

Oscar Eugene Battles, MD

Gail Bentley, MD

Christina Birsan, MD

Michael E. Black, MD

Keith D. Bohman, MD

Summer Bohman, MD

Jody S. Brahney, MD

Kathy S. Bruner, MD

Jaime A. Campbell, MD, MS

Diana Castro-Villabon, MD

Frances L. Cate, MD

Justin M. Cates, MD, PhD

Pranil K. Chandra, DO

Alex G. M. Chang, MD

Henry Chen, MD, PhD

Jared L. Cobb, MD

Ben W. Davis, MD

Mairo L. Diolombi, MD

Sarah Amelia Donnell, MBBS

Olena Dorokhova, MD, PhD

James E. Dunnington, MD

Derek Ellingson, DO

Kristina J. Fasig, MD

John H. Fasig, MD

Eugene G. Fong, MD

Rebecca L. Foust, MD

Annie Garcia, MD

Maria K. Garcia, MD

Lan L. Gellert, MD, PhD

Lili Geng, MD

Henning E Gertz, MD

Alexia Ghazi, DO

Javed Iqbal Gill, MD

Medha Godbole, MD

Andrew L. Golden, MD

Tiffany M. Graham, MD

G. Scott Hall, MD

Aaron Harper, MD

Dawn Harter, MD

Taylor L. Hartley, MD, MPH

Richard B. Hessler, MD

Wesley Hiser, MD

He Huang, MD, PhD

David J. Huddleston, MD

Ryan M. Jones, MD

Rujuta Kanhere, MD

Kathryn T. Knight, MD

Meghan Koch, DO

Vladimir D. Kravtsov, II, MD

Kenneth Rand Lamm, MD

Angela Lapus, MD, MPH

Julie W. Lemmon, MD

Daryl B. Lundgrin, MD

Nitin Marwaha, MD

Joshua Mayne, MD

Benton R. Middleman, MD

Carl M. Minami, MD

Melinda R. Mohr, MD

Mufaddal Najmuddin, MD

Agne Naujokas, DO

Jorge M. Oliver, MD

Payam Samareh Pahlavan, MD, MSc, FRCPC, FCAP

Amy C. Parsons, MD

Jeremiah Pasion, MD

Melissa Patton, MD

Justin S. Poling, MD

Lori M. Proctor, MD

Barbara Proctor, MD

Nathan Carr Pulkingham, MD

Seshamma Reddy, MD, PhD, FCAP

Heather M. Rietz, MD

Marigny B. Roberts, MD

Mansoor A. Sajid, MD, PhD

Chet Lee Schwab, MD

S. Michelle Shiller, DO, AP/CP, MGP

Shruti A. Shukla, MD

Walt Simon, MD

Amrit Pal Singh, MD

David C. Spence, MD

Elijah Stiefel, MD

Alison E. Stoner, MD

John Summerville, MD

Douglas G. Toler, MD

Siavash Toosi, MD

Dana C. Tunnell, MD

Leilani Valdes, MD

Jingchuan Wang, MD, PhD, FCAP

Derek C. Welch, MD

Linda Winneberger, MD

Amy Elizabeth Wright, MD

Haiying Zhang, MD

Wei Zhang, MD

Xin Jin (Joseph) Zhou, MD

Christiaan Erik de Vries, MD

Emeritus

Samuel H. Dillard, Jr., MD

James H. Godfrey, Jr., MD

Larry G. Graham, MD

Edgar H. Pierce, Jr. MD

Mary P. Schatz, MD

Samuel A. Smith, MD

Dean G. Taylor, MD

Robert W. Wahl, MD

Retired

Jere W. Baxter, MD

Donna J. Boden, MD

Pramod K. Carpenter, MD

Dan E. Connor, MD

Jimmy L. Costin, MD

Chris J. Dempsher, MD

Warren J. Eisenstein, MD

Lori D. Emerson, MD

Alan K. Galloway, MD

Jerry L. Gibbs, MD

Thomas E. Hanes, MD

Samuel L. Harboldt, MD

Steven M. Jones, MD

Roy W. Kirchberg, MD

Wayne J. Lennington, MD

Elsie P. Ollapally, MD

Terry B. Ponder, MD

Abdul K. Shamsuddin, MD

John W. Templeton, MD

Rena M. Thomison, MD

John B. Thomison, Jr., MD

Neal E. Wearner, MD

In Memorium

Richard D. Buchanan, MD

William H. Farthing, Jr., MD

Michel N. Haddad, MD

John D. Jones, MD

Hugo C. Pribor, MD, PhD

John B. Thomison, MD

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Click here to access the latest in client resources, including technical bulletins, useful links, patient letters, and more.

PathGroup Services

Primary Care/Internal Medicine

Fast, accurate, clinical pathology services.

The latest in hematology and oncology diagnostic services.

Featured News

PathGroup Chooses Proscia to Deliver Next Generation of Cancer Diagnosis for Millions of Patients

NASHVILLE and PHILADELPHIA – March 1, 2023 – Proscia®, a leading provider of digital and computational pathology solutions, today announced that PathGroup, one of the largest providers of anatomic, clinical, digital, and molecular pathology services in the United States, will … Continued

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Associated Pathologists

Physician Leadership

Derek C. Welch, MD, FCAP

Richard B. Hessler, MD

Pranil K. Chandra, DO, FCAP, FASCP

Marigny B. Roberts, MD

Ryan M. Jones, MD

Kathryn Knight, MD

Expert Pathologists

Bijan Amirghassemi, MD

Bijan Amirghassemi, MD

S. Jaweed Ansari, MD

S. Jaweed Ansari, MD

Michael I. Argyres, MD

Michael I. Argyres, MD

Charles H. Aust, Jr., MD

Charles H. Aust, Jr., MD

Joshua Baalwa, MD, PhD

Joshua Baalwa, MD, PhD

Jaya Bajaj, MD, MHA

Jaya Bajaj, MD, MHA

Oscar Eugene Battles, MD

Oscar Eugene Battles, MD

Gail Bentley, MD

Gail Bentley, MD

Christina Birsan, MD

Christina Birsan, MD

Michael E. Black, MD

Michael E. Black, MD

Keith D. Bohman, MD

Keith D. Bohman, MD

Summer Bohman, MD

Summer Bohman, MD

Jody S. Brahney, MD

Jody S. Brahney, MD

Kathy S. Bruner, MD

Kathy S. Bruner, MD

Jaime A. Campbell, MD, MS

Jaime A. Campbell, MD, MS

Diana Castro-Villabon, MD

Diana Castro-Villabon, MD

Frances L. Cate, MD

Frances L. Cate, MD

Justin M. Cates, MD, PhD

Justin M. Cates, MD, PhD

Pranil K. Chandra, DO

Pranil K. Chandra, DO

Alex G. M. Chang, MD

Alex G. M. Chang, MD

Henry Chen, MD, PhD

Henry Chen, MD, PhD

Jared L. Cobb, MD

Jared L. Cobb, MD

Ben W. Davis, MD

Ben W. Davis, MD

Mairo L. Diolombi, MD

Mairo L. Diolombi, MD