Dr. Maria M Oliva-Hemker MD Pediatric Gastroenterologist

Dr. Maria Oliva-Hemker is a pediatric gastroenterologist in Baltimore, Maryland and is affiliated with multiple hospitals in the area, including Greater Baltimore Medical Center and Howard County General Hospital. She received her medical degree from Johns Hopkins University School of Medicine and has been in practice for 28 years. Dr. Oliva-Hemker accepts several types of health insurance, listed below. She is one of 16 doctors at Greater Baltimore Medical Center and one of 9 at Howard County General Hospital who specialize in Pediatric Gastroenterology.

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Office Location

See Contact Information

Specialty & Clinical Interests

Pediatric Gastroenterologist: General Pediatric Gasteroenterology

Hospital Affiliation

Greater Baltimore Medical Center

Johns Hopkins Hospital
Ranked #7 in Pediatrics: Gastroenterology & GI Surgery

Howard County General Hospital

Kennedy Krieger Institute

Education & Medical Training

Johns Hopkins University
Residency, Pediatrics, 1986–1989

Johns Hopkins University School of Medicine
Class of 1986

Certifications & Licensure

American Board of Pediatrics
Certified in Pediatric Gastroenterology

American Board of Pediatrics
Certified in Pediatrics

MD State Medical License
Active through 2015

Publications & Presentations

The Prevalence of Clostridium difficile Infection in Pediatric and Adult Patients with Inflammatory Bowel Disease.
Hourigan, S. K.,Oliva-Hemker, M.,Hutfless, S.

Liver Enzyme Elevations within Three Months of Diagnosis of Inflammatory Bowel Disease and Likelihood of Liver Disease.
Goyal, A.,Hyams, J. S.,Lerer, T.,Leleiko, N. S.,Otley, A. R.,Griffiths, A. M.,Rosh, J. R.,Cabrera, J. M.,Oliva-Hemker, M. M.,Mack, D. R.,Rick, J. N.,Pfefferkorn, M. D.,Carvalho, R.,Grossman, A. B.,Hitch, M. C.,Sudel, B.,Kappelman, M. D.,Saeed, S. A.,Faubion, W. A.,Schaefer, M. E.,Markowitz, J. F.,Keljo, D. J.

Increased effectiveness of early therapy with anti-tumor necrosis factor-α vs an immunomodulator in children with Crohn's disease.
Walters, T. D.,Kim, M. O.,Denson, L. A.,Griffiths, A. M.,Dubinsky, M.,Markowitz, J.,Baldassano, R.,Crandall, W.,Rosh, J.,Pfefferkorn, M.,Otley, A.,Heyman, M. B.,LeLeiko, N.,Baker, S.,Guthery, S. L.,Evans, J.,Ziring, D.,Kellermayer, R.,Stephens, M.,Mack, D.,Oliva-Hemker, M.,Patel, A. S.,Kirschner, B.,Moulton, D.,Cohen, S.,Kim, S.,Liu, C.,Essers, J.,Kugathasan, S.,Hyams, J. S.

See all 53 publications

Insurances Accepted

  • Aetna Choice POS II
  • Aetna HMO
  • BCBS Blue Card PPO
  • BCBS California PPO
  • Blue Shield California HMO
  • Blue Shield California PPO
  • CareFirst BCBS Maryland POS
  • CareFirst BlueChoice Advantage
  • CareFirst BlueChoice Network POS
  • CareFirst BluePreferred PPO
  • CIGNA HMO
  • CIGNA Open Access
  • CIGNA PPO
  • First Health PPO
  • Great West PPO
  • Health Net California Large Group PPO
  • Health Net HMO - Employer Group
  • Humana ChoiceCare Network PPO
  • Multiplan PHCS PPO
  • Multiplan PPO
  • United Healthcare - Direct Choice Plus POS
  • United Healthcare - Direct Options PPO

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