Arthur John de Lorimier, M.D. for UC Davis Health

Arthur John de Lorimier, M.D.

Director of Pediatric Gastroenterology

Clinical Professor, Department of Pediatrics

To see if Arthur John de Lorimier is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).



Pediatric Gastroenterology



Locations and Contact

Glassrock Building

Glassrock Building
2521 Stockton Blvd.
Sacramento, CA 95817

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Phone: 916-734-3112

UC Davis Medical Group - Carmichael

UC Davis Medical Group - Carmichael
7551 Madison Ave.
Citrus Heights, CA 95610

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Additional Numbers

Physician Referrals

800-4-UCDAVIS (800-482-3284)

Philosophy of Care

As a 24 year veteran of Army Medicine I have come to recognize that healthcare is a team sport. As such, I actively seek the cooperative input of parents and primary caregivers in the care of my patients so that the therapeutic options I provide are practical and timely to the patient’s needs.

Coordination of care with other sub-specialists is essential to the care of my patients. I am willing to consider integrating non-traditional options in their care. I consider it a great honor to provide for the healthcare needs of children.

Clinical Interests

Dr. Arthur de Lorimier cares for patients with all forms of Pediatric gastrointestinal disorders to include feeding difficulties, motility disorders, functional disorders of the bowel, Inflammatory Bowel Diseases, and nutritional disorders.

As a Helms Medical Acupuncture trained physician, he provides acupuncture to appropriate patients as an adjunct to traditional treatments in the care of children with functional and motility disordersmof the gut.

Research/Academic Interests

Dr. de Lorimier is interested in the study of functional and motility disorders of the gastrointestinal tract, small bowel rehabilitation, and integrating non-traditional forms of healthcare in the care of his patients.


Pediatric Gastroenterology and Nutrition

Center/Program Affiliation

UC Davis Children's Hospital

Undergraduate School

B.A., History, Santa Clara University, Santa Clara CA 1986

Medical School

M.D., Loyola University, Stritch School of Medicine, Maywood IL 1991

Other School

M.D., Medical Acupuncture for Physicians, Helms Medical Institute, Potomac MD 2015


Pediatrics, Tripler Army Medical Center, Honolulu HI 1991-1992


Pediatrics, Tripler Army Medical Center, Hololulu HI 1992-1994


Pediatric Gastroenterology, Walter Reed Army Medical Center, Washington DC 1997-2000

Sacramento Top Docs Award, 2019, 2020, 2021, 2022

Golden Apple Award for Excellence in Teaching Residents, 2020

Secretary of Defense Superior Service Award, 2015

Order of Military Medical Merit, 2011

Ogden C. Bruton First Place Award: Sponsored by the Uniformed Services Section of the American Academy of Pediatrics for the best basic science research paper presentation: Murine Antibody Response to a vaccine for Enterotoxigenic Escherichia coli, March, 2000

Theodorou CM, Jackson JE, Stokes SC, Pivetti CD, Kumar P, Paxton ZJ, Matsukuma KE, Yamashiro KJ, Reynaga L, Hyllen AA, de Lorimier AJ, Hassan M, Wang A, Farmer DL, Saadai P. Early investigations into improving bowel and bladder function in fetal ovine myelomeningocele repair. J Pediatr Surg. 2022 May;57(5):941-948. doi:10.1016/j.jpedsurg.2021.12.046. Epub 2022 Jan 13. PMID:35093254.

Say DS, de Lorimier A, Lammers CR, Natale J, Lakshminrusimha S, Wiedeman J, Partridge E. Addendum to: Risk Stratification and Personal Protective Equipment Use in Pediatric Endoscopy During the COVID-19 Outbreak: A Single-center Protocol. J Pediatr Gastroenterol Nutr. 2020 Jun;70(6):755-756. doi:10.1097/MPG.0000000000002762. PMID:32443024.

Say DS, de Lorimier A, Lammers CR, Natale J, Lakshminrusimha S, Wiedeman J, Partridge E. Risk Stratification and Personal Protective Equipment Use in Pediatric Endoscopy During the Coronavirus Disease 2019 Outbreak: A Single-center Protocol. J Pediatr Gastroenterol Nutr. 2020 Jun;70(6):751-754. doi:10.1097/MPG.0000000000002731. PMID:32443023.

de Lorimier A, et al. Acupuncture Treatment for Functional Gastrointestinal Disorders in Children. World Congress Pediatr Gastroenterol Hepatol Nutrition, Montreal. 2016 Oct 6.

de Lorimier A. Smart Care Coordination: Managing Referrals and Appointing in the National Capital Region. American College of Physician Executives Webinar. 2014 Mar 27. (, slides at

Byrd W, de Lorimier A, Zheng ZR, Cassels FJ. Microencapsulated subunit vaccine approach to enterotoxigenic Escherichia coli and other mucosal pathogens. Adv Drug Deliv Rev. 2005 Jun 17;57(9):1362-80. doi:10.1016/j.addr.2005.01.014. Epub 2005 Apr 26. PMID:15935878.

Meza-Valencia BE, de Lorimier AJ, Person DA. Hirschsprung disease in the U.S. associated Pacific Islands: more common than expected. Hawaii Med J. 2005 Apr;64(4):96-8, 100-1. PMID:15921246.

Katz DE, DeLorimier AJ, Wolf MK, Hall ER, Cassels FJ, van Hamont JE, Newcomer RL, Davachi MA, Taylor DN, McQueen CE. Oral immunization of adult volunteers with microencapsulated enterotoxigenic Escherichia coli (ETEC) CS6 antigen. Vaccine. 2003 Jan 17;21(5-6):341-6. doi:10.1016/s0264-410x(02)00613-8. PMID:12531630.

Coster TS, Wolf MK, Hall ER, Cassels FJ, Taylor DN, Liu CT, Trespalacios FC, DeLorimier A, Angleberger DR, McQueen CE. Immune response, ciprofloxacin activity, and gender differences after human experimental challenge by two strains of enterotoxigenic Escherichia coli. Infect Immun. 2007 Jan;75(1):252-9. doi:10.1128/IAI.01131-06. Epub 2006 Oct 30. PMID:17074855.

Hutchinson J, de Lorimier A. Five Lessons Learned With Electronic Military Medical Records. Council on Clinical Information Technology: The AAP Practice Management Newsletter. 2006;4(2):6.

Pediatric GI with Acupuncture - UC Davis Children's Hospital