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Office
3181 SW Sam Jackson Park Rd
Portland, OR 97239Phone+1 503-494-8311
Education & Training
- Oregon Health & Science University (OHSU Health)Fellowship, Endocrinology, Diabetes, and Metabolism, 2007 - 2010
- Oregon Health & Science University (OHSU Health)Residency, Internal Medicine, 2004 - 2007
- Oregon Health and Science University School of MedicineClass of 2004
- University of Oregon’s Robert Donald Clark Honors CollegeBA, 2000
Certifications & Licensure
- OR State Medical License 2006 - 2025
- WA State Medical License 2022 - 2025
- MN State Medical License 2021 - 2024
- American Board of Internal Medicine Internal Medicine
- American Board of Internal Medicine Endocrinology, Diabetes and Metabolism
Awards, Honors, & Recognition
- Most Outstanding Curriculum Block OHSU Medical School, 2016
- CMS Meaningful Use Stage 1 Certification EpicCare Ambulatory EMR, Epic Systems Corporation, 2012-2013
- Medical Housestaff Teaching Award 2007
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Clinical Trials
- Efficacy and Safety of Nasal Glucagon for Treatment of Hypoglycemia in Adults Start of enrollment: 2013 Nov 01
- PK/PD Study With G-Pump (Glucagon Infusion) in T1DM Patients Start of enrollment: 2014 Mar 01
- Context Aware Data Gathering Study Start of enrollment: 2020 Aug 11
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Publications & Presentations
PubMed
- 96 citationsA Glycemia Risk Index (GRI) of Hypoglycemia and Hyperglycemia for Continuous Glucose Monitoring Validated by Clinician Ratings.David C Klonoff, Jing Wang, David Rodbard, Michael A Kohn, Chengdong Li
Journal of Diabetes Science and Technology. 2023-09-01 - 32 citationsPrediction of Hypoglycemia During Aerobic Exercise in Adults With Type 1 Diabetes.Ravi Reddy, Navid Resalat, Leah M. Wilson, Jessica R. Castle, Joseph El Youssef
Journal of Diabetes Science and Technology. 2019-01-17 - 10 citationsEnabling fully automated insulin delivery through meal detection and size estimation using Artificial Intelligence.Clara Mosquera-Lopez, Leah M Wilson, Joseph El Youssef, Wade Hilts, Joseph Leitschuh
NPJ Digital Medicine. 2023-03-13
Journal Articles
- Comparative Pharmacokinetic/Pharmacodynamic Study of Liquid Stable Glucagon vs Lyophilized Glucagon in Type 1 Diabetes SubjectsCastle JR, El Youssef J, Branigan D, Newswanger B, Strange P, Cummins M, Shi L, Prestrelski S, J Diabetes Sci Technol, 1/1/2016
- Randomized Trial of a Dual-hormone Artificial Pancreas with Dosing Adjustment During Exercise Compared with No Adjustment and Sensor-augmented Pump TherapyJacobs P, El Youssef J, Reddy R, Resalat N, Branigan D, Condon J, Preiser N, Ramsey K, Jones M, Edwards C, Kuehl K, Leitschuh J, Rajhbeharrysing U, Castle JR, Diabetes, Obesity and Metabolism, 1/1/2016
- Non-adjunctive Use of Continuous Glucose Monitoring for Diabetes Treatment DecisionsCastle JR, Jacobs PG, J Diabetes Sci Technol, 1/1/2016
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Abstracts/Posters
- Comparative PK/PD Study of Liquid Stable G-Pump Glucagon vs. Novo Nordisk Glucagen Delivered to T1DM Patients via an Omnipod PumpCastle JR, Advanced Technologies and Treatments for Diabetes, 1/1/2015
- The Use of Redundant Dexcom New Generation Sensors to Assess Sensor Accuracy and PerformanceCastle JR, Diabetes Technology Meeting, 1/1/2012
- Assessment of Hepatic Glycogen Using Magnetic Resonance Spectroscopy: Implications for Bi-hormonal Artificial PancreasCastle JR, American Diabetes Association 72nd Scientific Session, 1/1/2012
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Lectures
- Is Mini-Dose Glucagon the Answer to Preventing Exercise-Related Dysglycemia?Portland, OR - 6/14/2014
- Hypoglycemia1/1/2017
- Glucose HomeostasisOHSU School of Medicine - 1/1/2017
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Press Mentions
- Georgia and Its Hospitals Scramble to Prepare for Coronavirus SurgeApril 1st, 2020
- Oregonians with Diabetes Facing Tough Choices as Insulin Prices SoarFebruary 4th, 2019
- Xeris Pharmaceuticals Kicks off Dual-Hormone Artificial Pancreas TrialAugust 20th, 2018
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