TEL: 503-963-3030 
FAX: 503-963-3140

Breathing is an incredibly complex process that sustains us every minute of every day. Dr. Chapa believes that the problems of the respiratory system are fascinating to solve, but also gratifying to help patients with, because breathing well is so fundamental to living well.

Before his career as a physician, Dr. Chapa was a professional runner and has experience pushing his body to the limits while also dealing with asthma. He believes that combining an expert understanding of the medical science and physiology of breathing with that direct life experience helps set him apart as a physician.

Dr. Chapa has called Oregon home for his entire life; he thinks there is nowhere more special. Dr. Chapa deeply enjoys helping people in this community that he has always been a part of and where he has a lifetime bond.

Outside of work, Dr. Chapa enjoys cooking, gardening, reading, trail running, and traveling.

Other Activities

Member, American Thoracic Society


Fellowship, Pulmonary & Critical Care Medicine, Oregon Health & Science University, Portland, OR, 2022

Residency, Internal Medicine, Oregon Health & Science University, Portland, OR, 2019

MD, The University of Chicago Pritzker School of Medicine, Chiago, IL, 2016

MS, Journalism, University of Oregon, Eugene, OR, 2008

BA, Political Science, Stanford University, Palo Alto, CA, 2007


Critical Care Medicine

Pulmonary Medicine – Board Eligible


OHSU Department of Medicine Clinical Teaching Award

American Thoracic Society Minority Trainee Development Scholarship

Best Clinical Research Award: American College of Physicians Oregon Chapter


Chapa, Joaquin, Alyson Haslam, and Vinay Prasad. “Interpreting the Effectiveness of Cancer Screening From National Population Statistics: Is It Sound Practice?.” Mayo Clinic Proceedings. Vol. 94. No. 6. Elsevier, 2019

Chapa, Joaquin, Zeeshan Haq, and Adam S. Cifu. “Comparative analysis of the factors associated with citation and media coverage of clinical research.” Scientometrics 112.3 (2017): 1271-1283.

Chapa, Joaquin, Gary An, and Swati A. Kulkarni. “Examining the relationship between pre-malignant breast lesions, carcinogenesis and tumor evolution in the mammary epithelium using an agent-based model.” Plos one 11.3 (2016): e0152298.

Chapa, Joaquin, et al. “Examining the pathogenesis of breast cancer using a novel agent-based model of mammary ductal epithelium dynamics.” PloS one 8.5 (2013): e64091. APA