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John Phillip Gearhart, MD

Robert D. Jeffs Professor
Professor of Urology
Appointment Phone


Main Location

Johns Hopkins Outpatient Center

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Out of State Patients

Call 410-464-6641 (8a.m. to 6p.m., EST, Mon-Fri)

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International Patients

Call +1-410-502-7683 (7a.m. to 6p.m., EST, Mon-Fri)

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  • Robert D. Jeffs Professor
  • Director of Pediatric Urology
  • Professor of Urology
  • Professor of Pediatrics

Centers & Institutes

  • Children's Center
  • James Buchanan Brady Urological Institute
  • Sidney Kimmel Comprehensive Cancer Center


Ambiguous Genitalia, Bladder Exstrophy, Major Urologic Birth Defects, Pediatric Urology, Urology, Urology / Urologic Surgery

Research Interests

Bladder exstrophy; Disorders of sexual development (DSD); Major urological birth defects


Dr. John P. Gearhart is a professor of pediatrics and urology at the Johns Hopkins School of Medicine, and serves as Director of Pediatric Urology at the Johns Hopkins Children''s Center. His clinical and surgical interests focus on the evaluation and treatment of children born with major congenital birth defects, bladder exstrophy, disorders of sexual development and childhood urinary cancers.

Dr. Gearhart received his M.D. from the University of Louisville School of Medicine in 1975. After an internship in surgery and residencies in surgery and urology at the Medical College of Georgia, he completed a fellowship in pediatric urology at Alder Hey Children''s Hospital of the University of Liverpool School of Medicine in 1981.

Following two years as a urologist at St. Mary''s Hospital in Huntington, West Virginia, he completed a second fellowship in pediatric urology at Johns Hopkins in 1985 and joined the Johns Hopkins faculty thereafter as an associate professor of pediatric urology.

Over the course of his distinguished career, Dr. Gearhart has been lauded as a pioneer in pediatric urology and reconstructive genitourinary surgery. He has published extensively and has received numerous awards and guest lectureships. He is a member of several national and international professional organizations and is a founding member of the Society of Reconstructive Genitourinary Surgeons.


  • English


American Urological Association

American College of Surgeons (Fellow)

American Academy of Pediatrics - Urology Section

Society of Pediatric Urology

British Association of Urological Surgeons

Society of Reconstructive Genitourinary Surgeons (Founding Member)

Maryland Urological Association

European Society of Pediatric Urology (Invited Member)

British Association of Pediatric Urologists

Royal Society of Medicine, London, England

Society of Pediatric Urological Surgeons (Invited Member)

Additional Resources

Additional Resources +
  • Education +


    • University of Louisville School of Medicine (Louisville KY ) (1975)


    • Medical College of Georgia - Registrar / Urology (Augusta GA ) (1980)


    • Johns Hopkins University School of Medicine / Pediatric Urology (Baltimore MD ) (1985)
    • Alder Hey Children's Hospital / Pediatric Urology (Liverpool UK ) (1981)


    • Urology, American Board of Urology (1982)
  • Research & Publications +

    Research Summary

    Dr. Gearhart's clinical and surgical research interests focus largely on the evaluation and treatment of the bladder muscle, nerve supply, and collagen content of the extrophied bladder. He also oversees long-term follow up studies of patients with disorders of sexual development. Additionally, he studies and implements new techniques to evaluate and treat children with childhood kidney tumors, and to reconstruct the bladders of children who have undergone previous failed bladder exstrophy closures.

  • Academic Affiliations & Courses +
  • Activities & Honors +


    Awarded Fellowship ad hominem of the Royal College of Surgeons, Edinburgh, 2008

    Invited guest lecturer, World Congress of Pediatric Surgery, Buenos Aires, Argentina, 2007

    1st Charles J. Devine Memorial Lecture at American Urological Association, Genitourinary Reconstructive Surgeons Meeting, 2007

    Invited guest lecturer, European Society of Pediatric Urology, 1992, 2004, 2006

    Gordon Stenning Award, Australian Society of Pediatric Urology, 2005

    Asian Society of Pediatric Urology, 2005

    1st J. Herbert Johnston Memorial Lecture, British Association of Pediatric Surgeons, 2004

    Mater’s Lecture in Pediatric Urology, AAP Annual Meeting, 2003

    Lavengood Memorial Lectureship, Cornell University School of Medicine, 2003

    Special Consultant on Pediatric Surgery/Urology, National Health Service, London, England, 2002

    Invited Guest Lecturer, American Urological Association, 2001

    Invited Guest Lecturer, American College of Surgeons, 2001

    Invited Guest Lecturer, Society of Pediatric Urology, 1992, 1997

    Invited Guest Lecturer, Society of Fetal Urology, 1996

    Anglo-American Visiting Professor Teaching Scholarship and Medal, Royal Society of Medicine, 1995

    Pediatric Poster Session Winner, American Urological Association, 1989, 1994

    Winner, Pediatric Poster Section, Kimbrough Urologic Seminar, 1989

    Outstanding Alumnus, Morehead State University, 1987

    Research Award, American Academy of Pediatrics, Urology Section, 1987

  • Videos & Media +
  • Events +
  • Contact & Locations +


    Johns Hopkins Outpatient Center
    601 N. Caroline Street
    Baltimore, MD 21287
    Phone: 410-955-5358
    Appointment Phone: 410-955-6108
    Fax: 410-955-0833
    Location Map
    The Johns Hopkins Hospital
    600 N. Wolfe Street
    Sheikh Zayed Tower
    Baltimore, MD 21287
    Phone: 410-955-5358
    Appointment Phone: 410-955-6108
    Fax: 410-955-0833
    Location Map
    Johns Hopkins Medicine - Green Spring Station
    10755 Falls Road
    Pavilion I
    Lutherville, MD 21093
    Phone: 410-955-5358
    Appointment Phone: 410-955-6108
    Fax: 410-955-0833
    Location Map


    • Urology

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