Our Pathologists

Qualifications

The pathologists at Pathology Medical Services, P.C., are trained in many disciplines of pathology. Many of the pathologists are fellowship-trained specialists in multiple fields and possess special interests in many non-fellowship disciplines. Our pathologists maintain a strong internal consultation program. When an outside opinion is requisite, Pathology Medical Services, P.C. utilizes a network of nationally known and respected medical facilities for external consult. Mayo Medical Laboratories is utilized for much of the esoteric testing needs. Mayo Medical Laboratories is a distinctive leader in the field of esoteric testing, offering expert consultation services.

Deborah K. Davidson, D.O.

Board Certified Anatomic and Clinical Pathology

Dr. Deborah Davidson joined Pathology Medical Services, P.C. August 1, 1991. She is a graduate of the Texas College of Osteopathic Medicine, Fort Worth, Texas. She was an Anatomic and Clinical Pathology Resident at Scott and White Memorial Hospital in Temple, Texas and completed a Fellowship in Surgical Pathology at Mayo Clinic, Rochester, Minnesota. She is Board Certified in Anatomic and Clinical Pathology by the American Board of Pathology.

Ryan DeHaan, M.D.

Board Certified Anatomic and Clinical Pathology

Dr. Ryan DeHaan joined Pathology Medical Services, P.C. July 1, 2007. He is a graduate of the University of Kansas School of Medicine, Kansas City, KS. He completed his residency in anatomic and clinical pathology and a fellowship in surgical pathology at the Mayo Clinic in Rochester, Minnesota. He is board certified in anatomic and clinical pathology by the American Board of Pathology.

Serving as President

Michael J. Duggan, M.D.

Board Certified Anatomic and Clinical Pathology

Board Certified in Hematopathology

Dr. Michael Duggan joined Pathology Medical Services, P.C. January 1, 1991. He is a graduate of the University of Nebraska College of Medicine, Omaha, Nebraska. He was a resident at the University of Colorado Health Sciences Center, Denver, Colorado, in the Department of Pathology. He then completed his residency, as well as a fellowship in hematopathology at the University of Nebraska College of Medicine, Omaha, Nebraska. He served as Chief Resident in the Department of Pathology and Microbiology at the University of Nebraska Medical Center, Omaha, Nebraska and was a Clinical Coagulation Fellow in the Department of Hospital Laboratories, North Carolina Memorial Hospital, University of North Carolina, Chapel Hill, North Carolina. He is Board Certified in Anatomic and Clinical Pathology and Hematology by the American Board of Pathology.

Patrick A. Keelan, M.S., M.D.

Board Certified Anatomic and Clinical Pathology

Board Certified in Cytopathology

Dr. Patrick Keelan joined Pathology Medical Services, P.C. July 15, 1992. He is a graduate of the University of Nebraska College of Medicine, Omaha, Nebraska. He completed a Resident Program in Pathology and Laboratory Medicine at Mayo Clinic, Rochester, Minnesota, and was a Fellow in Surgical Pathology, Cytopathology and Hematopathology at the Ball Memorial Hospital, Muncie, Indiana. He is Board Certified in Anatomic and Clinical Pathology and Cytopathology by the American Board of Pathology.

Steffan R. Lacey, M.D.

Board Certified Anatomic and Clinical Pathology

Dr. Steffan Lacey joined Pathology Medical Services, P.C. June 1, 1983. He is a graduate of the University of Nebraska College of Medicine, Omaha, Nebraska. He completed his Residency in the Pathology Department, University of Kansas School of Medicine, St. Francis Regional Center, Wichita, Kansas. He is Board Certified in Anatomic and Clinical Pathology by the American Board of Pathology.

Darrell (Darek) R. Lester, Jr., M.D.

Board Certified Anatomic and Clinical Pathology

Board Certified in Hematopathology

Dr. Darek Lester joined Pathology Medical Services, P.C. July 1, 2001. He is a graduate of the Indiana University School of Medicine, Indianapolis, Indiana. He completed his Residency in the Pathology Department at the University of Iowa Hospitals and Clinics, Iowa City, Iowa and Fellowships in Hematopathology and Surgical Pathology at Barnes-Jewish Hospital-Washington University Medical Center, St. Louis, Missouri. He is Board Certified in Anatomic and Clinical Pathology and Hematopathology by the American Board of Pathology.

Serving as Treasurer

Christopher T. Masada, M.D.

Board Certified Anatomic and Clinical Pathology

Dr. Christopher Masada joined Pathology Medical Services, P.C. June 22, 1992. He is a graduate of the University of Nebraska College of Medicine, Omaha, Nebraska. He completed his Residency in the Department of Pathology and Microbiology at the University of Nebraska Affiliated Hospitals, Omaha, Nebraska, where he served as Chief Resident. He is Board Certified in Anatomic and Clinical Pathology by the American Board of Pathology.

Scott M. Noel, M.D.

Board Certified Anatomic and Clinical Pathology

Dr. Scott Noel joined Pathology Medical Services, P.C. July 1, 1994. He is a graduate of the University of Nebraska Medical Center, Omaha, Nebraska. He completed his Residency in Anatomic and Clinical Pathology at the University of Nebraska Medical Center, Omaha, Nebraska. He is Board Certified in Anatomic and Clinical Pathology by the American Board of Pathology.

Serving as Secretary

Charles M. Reese, M.S., M.D.

Board Certified Anatomic and Clinical Pathology

Board Certified in Cytopathology

Dr. Charles Reese joined Pathology Medical Services, P.C. July 14, 1997. He is a graduate of the University of Nebraska Medical Center, Omaha, Nebraska. He completed a Pathology Residency at the University of Arizona Health Sciences Center, Tucson, Arizona and a Fellowship in Cytopathology at Baylor College of Medicine, Houston, Texas. He is Board Certified in Anatomic and Clinical Pathology and Cytopathology by the American Board of Pathology.

Serving as Medical Director

Aina I. Silenieks, M.D.

Board Certified Anatomic and Clinical Pathology

Dr. Aina Silenieks joined Pathology Medical Services, P.C. July 1, 1986. She is a graduate of the University of Nebraska College of Medicine, Omaha, Nebraska. She completed her Residency in Anatomic and Clinical Pathology at the University of Michigan Medical Center, Ann Arbor, Michigan.

Brian D. Toalson, M.D.

Board Certified Anatomic and Clinical Pathology

Dr. Brian Toalson joined Pathology Medical Services, P.C. July 1, 1996. He is a graduate of the University of Missouri School of Medicine, Columbia, Missouri. He completed a Pathology Residency at the University of Iowa, Iowa City, Iowa, and a Surgical Pathology Fellowship at the University of Iowa, Iowa City, Iowa. He is Board Certified in Anatomic and Clinical Pathology by the American Board of Pathology.

Serving as Chairman of the Board