LukejohnWelchDayMD

Gastroenterology • San Francisco, CA

Assistant Professor, Medicine, UCSF School of Medicine

Join to view full profile

Dr. Day is on Doximity

As a Doximity member you'll join over two million verified healthcare professionals in a private, secure network.

Connect with other colleagues in the same hospital or clinic
Search all U.S. specialist profiles and refer a patient
Read the latest clinical news and earn CME/CEU credits

See Dr. Day's full profile

Already have an account?

Office
1001 Potrero Ave
3D-5
San Francisco, CA 94110
Phone+1 415-206-8823
Is this information wrong?

Education & Training

University of California (San Francisco)Fellowship, Gastroenterology, 2007 - 2010
University of California (San Francisco)Residency, Internal Medicine, 2004 - 2007
Stanford University School of MedicineClass of 2004

Certifications & Licensure

CA State Medical License 2005 - 2025
FL State Medical License 2012 - 2021
American Board of Internal Medicine Gastroenterology

Publications & Presentations

PubMed

American Indian and Alaska Native Digestive Health: Challenges, Opportunities, and a Path Forward.
Tyson A Burningham, Lukejohn W Day> ;Gastroenterology. 2023 Dec 1
American Indian and Alaska Native Digestive Health: Challenges, Opportunities, and a Path Forward.
Tyson A Burningham, Lukejohn W Day> ;Clinical Gastroenterology and Hepatology. 2023 Dec 1
Transportation barriers and endoscopic procedures: barriers, legal challenges, and strategies for GI endoscopy units.
, Karl Kwok, Theodore R Levin, Jason A Dominitz, Kashyap Panganamamula, Andrew D Feld, Bruce Bardall, Kara Newbury, Lukejohn W Day> ;Gastrointestinal Endoscopy. 2023 Oct 1
Evaluating Disparities in Colon Cancer Survival in American Indian/Alaskan Native Patients Using the National Cancer Database.
Harika Nalluri, Schelomo Marmor, Saranya Prathibha, Asher Jenkins, Michelle Kihara, Michael A Sundberg, Lukejohn W Day, Mary J Owen, Ann C Lowry, Todd M Tuttle, Kassan...> ;Journal of Racial and Ethnic Health Disparities. 2023 Jul 11
1 citations
Interventions to improve the performance of ERCP and EUS quality indicators.
Rajesh N Keswani, Anna Duloy, Jose M Nieto, Kashyap Panganamamula, M Hassan Murad, Fateh Bazerbachi, Aasma Shaukat, B Joseph Elmunzer, Lukejohn W Day> ;Gastrointestinal Endoscopy. 2023 May 1
1 citations
Health Advocacy, Policy, and Legislation for Gastroenterology Practices.
Naser M Khan, Bruce Hennessy, Michael Lajin, Husna Qazi, Lukejohn Day> ;Clinical Gastroenterology and Hepatology. 2023 Aug 1
4 citations
Bridging the Racial, Ethnic, and Gender Gap in Gastroenterology.
Byron Cryer, Sandra Quezada, Joan A Culpepper-Morgan, Lukejohn Day, Vivek Kaul, Celena NuQuay, M Bishr Omary> ;Clinical Gastroenterology and Hepatology. 2022 Oct 1
Bridging the Racial, Ethnic, and Gender Gap in Gastroenterology.
Byron Cryer, Sandra Quezada, Joan A Culpepper-Morgan, Lukejohn Day, Vivek Kaul, Celena NuQuay, M Bishr Omary> ;Gastroenterology. 2022 Oct 1
19 citations
Endoscopic approach to eosinophilic esophagitis: American Society for Gastrointestinal Endoscopy Consensus Conference.
Seema S Aceves, Jeffrey A Alexander, Todd H Baron, Arjan J Bredenoord, Lukejohn Day, Evan S Dellon, Gary W Falk, Glenn T Furuta, Nirmala Gonsalves, Ikuo Hirano, Vani J...> ;Gastrointestinal Endoscopy. 2022 Oct 1
6 citations
Interventions to improve adenoma detection rates for colonoscopy.
Aasma Shaukat, Anne Tuskey, Vijaya L Rao, Jason A Dominitz, M Hassan Murad, Rajesh N Keswani, Fateh Bazerbachi, Lukejohn W Day> ;Gastrointestinal Endoscopy. 2022 Aug 1
2 citations
Interventions to improve the performance of upper GI endoscopy quality indicators.
Fateh Bazerbachi, Kashyap Panganamamula, Jose M Nieto, M Hassan Murad, Rajesh N Keswani, Aasma Shaukat, Lukejohn W Day> ;Gastrointestinal Endoscopy. 2022 Aug 1
3 citations
GI endoscope reprocessing: a comparative review of organizational guidelines and guide for endoscopy units and regulatory agencies.
, Pushpak Taunk, Rahul Shimpi, Ravi Singh, James Collins, V Raman Muthusamy, Lukejohn W Day> ;Gastrointestinal Endoscopy. 2022 Jun 1
Patient Experience in the Gastrointestinal Endoscopy Unit
Lukejohn W. Day, Thomas J. Savides> ;Clinical Gastroenterology and Hepatology. 2021 Dec 2
8 citations
American Society for Gastrointestinal Endoscopy radiation and fluoroscopy safety in GI endoscopy.
Karl Kwok, Nazia Hasan, Anna Duloy, Faris Murad, Jose Nieto, Lukejohn W. Day> ;Gastrointestinal Endoscopy. 2021 Aug 13
113 citations
AGA Clinical Practice Guidelines on the Medical Management of Moderate to Severe Luminal and Perianal Fistulizing Crohn's Disease.
Joseph D. Feuerstein, Edith Y. Ho, Eugenia Shmidt, Harminder Singh, Yngve Falck-Ytter, Shanaz Sultan, Jonathan P. Terdiman, Shahnaz Sultan, Benjamin L. Cohen, Karen A....> ;Gastroenterology. 2021 Jun 1
18 citations
AGA Clinical Practice Guidelines on Intragastric Balloons in the Management of Obesity.
Thiruvengadam Muniraj, Lukejohn W. Day, Levi Teigen, Edith Y. Ho, Shahnaz Sultan, Perica Davitkov, Raj Shah, M. Hassan Murad> ;Gastroenterology. 2021 Apr 1
45 citations
Multisociety guideline on reprocessing flexible GI endoscopes and accessories.
Lukejohn W. Day, V. Raman Muthusamy, James Collins, Vladimir Kushnir, Mandeep S. Sawhney, Nirav Thosani, Sachin Wani> ;Gastrointestinal Endoscopy. 2021 Jan 1
5 citations
American Society for Gastrointestinal Endoscopy Infection Control Summit: updates, challenges, and the future of infection control in GI endoscopy.
Lukejohn W. Day, Karl Kwok, Kavel H. Visrodia, Bret T. Petersen> ;Gastrointestinal Endoscopy. 2021 Jan 1
48 citations
Technical review on the management of eosinophilic esophagitis: a report from the AGA institute and the joint task force on allergy-immunology practice parameters
Matthew A. Rank, Rajiv N. Sharaf, Glenn T. Furuta, Seema S. Aceves, Matthew Greenhawt, Jonathan M. Spergel, Yngve T. Falck-Ytter, Evan S. Dellon, Karen A. Chachu, Luke...> ;Annals of Allergy, Asthma & Immunology. 2020 May 1
49 citations
Technical Review on the Management of Eosinophilic Esophagitis: A Report From the AGA Institute and the Joint Task Force on Allergy-Immunology Practice Parameters.
Matthew A. Rank, Rajiv N. Sharaf, Glenn T. Furuta, Seema S. Aceves, Matthew Greenhawt, Jonathan M. Spergel, Yngve T. Falck-Ytter, Evan S. Dellon, Karen A. Chachu, Luke...> ;Gastroenterology. 2020 May 1
129 citations
AGA Institute and the Joint Task Force on Allergy-Immunology Practice Parameters Clinical Guidelines for the Management of Eosinophilic Esophagitis
Ikuo Hirano, Edmond S. Chan, Matthew A. Rank, Rajiv N. Sharaf, Neil Stollman, David R. Stukus, Kenneth K. Wang, Matthew Greenhawt, Yngve T. Falck-Ytter, Karen A. Chach...> ;Gastroenterology. 2020 May 1
284 citations
AGA Clinical Practice Guidelines on the Management of Moderate to Severe Ulcerative Colitis.
Joseph D. Feuerstein, Kim L. Isaacs, Yecheskel Schneider, Shazia M. Siddique, Yngve Falck-Ytter, Siddharth Singh, Karen A. Chachu, Lukejohn W. Day, Benjamin Lebwohl, T...> ;Gastroenterology. 2020 Apr 1
4 citations
Effect of individualized feedback on learning curves in EGD and colonoscopy: a cluster randomized controlled trial.
Samuel Han, Joshua C. Obuch, Rajesh N. Keswani, Matthew Hall, Swati G. Patel, Paul Menard-Katcher, Violette C. Simon, Eze Ezekwe, Eva Aagaard, Asyia Ahmad, Saad Algham...> ;Gastrointestinal Endoscopy. 2020 Apr 1
33 citations
Diversity Within US Gastroenterology Physician Practices: The Pipeline, Cultural Competencies, and Gastroenterology Societies Approaches
John M. Carethers, Sandra M. Quezada, Rotonya M. Carr, Lukejohn W. Day> ;Gastroenterology. 2019 Mar 1
16 citations
Yield of Colonoscopy After a Positive Result From a Fecal Immunochemical Test OC-Light
Muhammad Alsayid, Maneesh H. Singh, Rachel B. Issaka, Victoria Laleau, Lukejohn W. Day, Jeffrey K. Lee, James E. Allison, Ma Somsouk> ;Clinical Gastroenterology and Hepatology. 2018 Oct 1
Join now to see all