Anne Arundel Urology

Our Physicians


Raymond G. Herzinger, M.D.
James D. Biles, M.D., F.A.C.S.
Edward M. Zagula, M.D.
John E. Danneberger, M.D.
David W. McDermott, M.D., F.A.C.S., F.A.A.P.

Eric J. Schwartz, M.D.
Kent G. Krejci, M.D.
Mara R. Holton, M.D.
Steven D. Rock, M.D.
Robert S. Hanley, M.D.

A urologist is a physician who has specialized knowledge and skill regarding problems of the male and female urinary tract and the male reproductive organs. Urology is classified as a surgical suburology. Urologists are trained to provide both medical and surgical treatment.

Raymond G. Herzinger, M.D. Dr. Herzinger
Board Certified Urologist

Undergraduate Degree:
Brigham Young University, UT

Medical Degree:
George Washington University, Washington, D.C.

Internship:
Tripler Army Hospital, HI

Residency:
Walter Reed Army Medical Center, Washington, D.C.

Board Certification:
American Board of Urology

Private Practice in Anne Arundel County since 1973

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James D. Biles, M.D., F.A.C.S. Dr. Biles
Board Certified Urologist

Undergraduate Degree:
Yale University, CT

Medical Degree:
Columbia University, NY

Internship:
Tulane University, LA

Surgical Residency:
Church Home Hospital, MD

Urology Fellowship:
John Hopkins Hospital, MD

Board Certification:
American Board of Urology
Fellow, American College of Surgeons

Private Practice in Anne Arundel County since 1975

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Edward M. Zagula, M.D. Dr. Zagula
Board Certified Urologist

Undergraduate Degree:
Wheeling College, WVA

Medical Degree:
West Virginia University, WV

Internship:
Bridgeport Hospital, CT

Surgical Residency:
Bridgeport Hospital, CT

Urology Residency:
Vanderbilt University, TN

Board Certification:
American Board of Urology

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John E. Danneberger, M.D. Dr. Danneberger
Board Certified Urologist

Undergraduate Degree:
University of Delaware, DE

Medical Degree:
University of Pittsburgh, PA

Internship:
Bethesda Naval Hospital

Surgical Residency:
Duke University, NC

Board Certification:
American Board of Urology

Private Practice in Anne Arundel County since 1989

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David W. McDermott, M.D., F.A.C.S., F.A.A.P. Dr. McDermott
Board Certified Urologist

Undergraduate Degree:
United States Military Academy, West Point, NY

Graduate Degree:
University of Santa Clara, CA

Medical Degree:
University of Texas, TX

Internship:
United States Air Force Center, Lackland, TX

Surgical Residency:
Massachusetts General Hospital, MA

Pediatric Urology Residency:
Children's Hospital Center, MA

Board Certification:
American Board of Urology Fellow, American College of Surgeons
Specialty Fellow, American Academy of Pediatrics

Private Practice in Anne Arundel County since 1973

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Eric J. Schwartz, M.D. Dr. Schwartz
Board Certified Urologist

Undergraduate Degree:
University of Pennsylvania, Philadelphia, PA

Medical Degree:
New York University, New York, NY

Internship, Surgical Residency and Fellowship:
University of Connecticut Health Center, Farmington, CT

Board Certification:
American Board of Urology

Private Practice in Anne Arundel County since 2004

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Kent G. Krejci, M.D. Dr. Krejci
(pronounced KRAY-chee)
Board Certified Urologist

Undergraduate Degree:
Lafayette College, Easton, PA

Medical Degree:
Temple University School of Medicine, Philadelphia, PA

Internship:
Mayo Clinic, Rochester, MN

Residency:
Mayo Clinic, Rochester, MN

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Mara R. Holton, M.D. Dr. Holton
Board-certified Urologist

Undergraduate Degree:
University of Vermont, Burlington, VT

Medical Degree:
Temple University School of Medicine, Philadelphia, PA

Internship:
University of Maryland, Baltimore, MD

Residency:
University of Maryland, Baltimore, MD

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Steven D. Rock, M.D. Dr. Rock
Board Certified Urologist

Undergraduate Degree:
St. Lawrence University, NY

Medical Degree:
State University of New York, Buffalo, NY

Internship, Surgical Residency and Fellowship:
University of Maryland Medical System, Baltimore, MD

Board Certification:
American Board of Urology

Practicing in Calvert and St. Mary's counties 1998-2002
Private Practice in Anne Arundel County since 2002

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Robert S. Hanley, M.D. Dr. Hanley
Board Certified Urologist

Undergraduate degree:
Boston College, Chestnut Hill, MA

Medical degree:
Georgetown University, Washington, DC

Internship:
Massachusetts General Hospital, Boston, MA

Residency:
Lahey Clinic, Burlington, MA

Dr. Hanley completed his residency at the prestigious Lahey Clinic in Massachusetts with special training in minimally invasive and robotic surgery.


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David William McDermott, Jr. M.D.
Board Certified Urologist

Undergraduate degree:
Washington and Lee University, Lexington, VA

Medical degree:
University of Texas health Science Center at San Antonio School of Medicine, San Antonio TX

Internship:
Brigham and Women's Hospital - affiliated with Harvard Medical School, Boston, MA

Residency:
Brigham and Women's Hospital - affiliated with Harvard Medical School, Boston, MA


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Juddson Trent Chason M.D.
Board Certified Urologist

Undergraduate degree:
Southern Methodist University, Dallas TX

Medical degree:
Northwestern University Feinberg School of Medicine, Chicago IL

Internship:
University of Maryland Department of General Surgery, Baltimore, MD

Residency:
University of Maryland Department of General Surgery, Baltimore, MD


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