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    Lukejohn Day

    TitleAssociate Professor
    SchoolUCSF School of Medicine
    DepartmentMedicine
    Address1001 Potrero Ave, SFGH 5
    San Francisco CA 94110
    Phone415-206-3832
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      Collapse Biography 
      Collapse Education and Training
      Yale UniversityB.S.Chemistry1998
      Stanford University M.D.Medicine2004
      University of California, San FranciscoResidency Internal Medicine2007
      University of California, San FranciscoFellowshipGastroenterology2010

      Collapse Overview 
      Collapse Overview
      Dr. Day is an associate professor of medicine at UCSF, Director of Clinical Gastroenterology at the Zuckerburg San Francisco General Hospital (ZSFG) and the Associate Chief Medical Officer for Specialty Care and Diagnostics at ZSFG. His research interests center on organizational design and development of efficiency models for health care system delivery to vulnerable patient populations. Specifically, his research explores the delivery of healthcare through the endoscopy center. He is currently working on developing key innovations that can be implemented at the ZSFG endoscopy center that focus on maximizing staff and physician efficiency, improving patient access to endoscopic care, and strengthening patient satisfaction. His research has spanned projects that have examined the quality of outpatient GI consultation notes, improving patient access though implementing a set of discharge criteria after endoscopy, studying the informed consent process in endoscopy education classes and improving endoscopy center operational efficiency using time and motion studies and simulation modeling.


      Collapse Bibliographic 
      Collapse Publications
      Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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      1. Kidambi TD, Lee R, Terdiman JP, Day L, et al. Successful implementation of Lynch syndrome screening in a safety net institution. J Community Genet. 2016 Jul 2. PMID: 27372833.
        View in: PubMed
      2. Day LW, Gonzalez S, Mendoza Ladd A, Bucobo JC, Pickett-Blakely O, Tilara A, Christie J. Diversity in gastroenterology in the United States: Where are we now? Where should we go? Gastrointest Endosc. 2016 Apr; 83(4):679-83. PMID: 26810008.
        View in: PubMed
      3. Chang JT, Sewell JL, Day LW. Prevalence and predictors of patient no-shows to outpatient endoscopic procedures scheduled with anesthesia. BMC Gastroenterol. 2015; 15:123. PMID: 26423366; PMCID: PMC4589132.
      4. Day LW, Belson D. Studying and Incorporating Efficiency into Gastrointestinal Endoscopy Centers. Gastroenterol Res Pract. 2015; 2015:764153. PMID: 26101525; PMCID: PMC4458534.
      5. Day LW, Nazareth M, Sewell JL, Williams JL, Lieberman DA. Practice variation in PEG tube placement: trends and predictors among providers in the United States. Gastrointest Endosc. 2015 Jul; 82(1):37-45. PMID: 25845635; PMCID: PMC4469567 [Available on 07/01/16].
      6. Day LW, Velayos F. Colorectal cancer screening and surveillance in the elderly: updates and controversies. Gut Liver. 2015 Mar; 9(2):143-51. PMID: 25721001; PMCID: PMC4351019.
      7. Day LW. Nonphysician Performance of Endoscopy. Gastroenterol Hepatol (N Y). 2015 Mar; 11(3):190-2. PMID: 27099590.
        View in: PubMed
      8. Sewell JL, Telischak KS, Day LW, Kirschner N, Weissman A. Preconsultation exchange in the United States: use, awareness, and attitudes. Am J Manag Care. 2014 Dec; 20(12):e564-72. PMID: 25665191.
        View in: PubMed
      9. Tuot DS, Sewell JL, Day L, Leeds K, Chen AH. Increasing access to specialty care: patient discharges from a gastroenterology clinic. Am J Manag Care. 2014 Oct; 20(10):812-9. PMID: 25365684.
        View in: PubMed
      10. Day LW, Velayos F. Colorectal cancer of the elderly. Curr Treat Options Gastroenterol. 2014 Sep; 12(3):269-82. PMID: 24938590.
        View in: PubMed
      11. Day LW, Belson D, Dessouky M, Hawkins C, Hogan M. Optimizing efficiency and operations at a California safety-net endoscopy center: a modeling and simulation approach. Gastrointest Endosc. 2014 Nov; 80(5):762-73. PMID: 24796958.
        View in: PubMed
      12. Gupta S, Sussman DA, Doubeni CA, Anderson DS, Day L, Deshpande AR, Elmunzer BJ, Laiyemo AO, Mendez J, Somsouk M, Allison J, Bhuket T, Geng Z, Green BB, Itzkowitz SH, Martinez ME. Challenges and possible solutions to colorectal cancer screening for the underserved. J Natl Cancer Inst. 2014 Apr; 106(4):dju032. PMID: 24681602; PMCID: PMC3982886.
      13. Day LW, Siao D, Inadomi JM, Somsouk M. Non-physician performance of lower and upper endoscopy: a systematic review and meta-analysis. Endoscopy. 2014 May; 46(5):401-10. PMID: 24627086; PMCID: PMC4153714.
      14. Day LW, Lin L, Somsouk M. Adverse events in older patients undergoing ERCP: a systematic review and meta-analysis. Endosc Int Open. 2014 Mar; 2(1):E28-36. PMID: 26134610; PMCID: PMC4423280.
      15. Siao D, Sewell JL, Day LW. Assessment of delivery methods used in the informed consent process at a safety-net hospital. Gastrointest Endosc. 2014 Jul; 80(1):61-8. PMID: 24518119.
        View in: PubMed
      16. Day LW, Velayos F. Colorectal cancer and the elderly. Clin Geriatr Med. 2014 Feb; 30(1):117-31. PMID: 24267607.
        View in: PubMed
      17. Calderwood AH, Chapman FJ, Cohen J, Cohen LB, Collins J, Day LW, Early DS. Guidelines for safety in the gastrointestinal endoscopy unit. Gastrointest Endosc. 2014 Mar; 79(3):363-72. PMID: 24485393; PMCID: PMC3980655.
      18. Day LW, Lin L, Somsouk M. . Adverse events in older patients undergoing ERCP: a systematic review and meta-analysis. Endoscopy International Open. 2014; 1(2):E28-E36.
      19. Sewell JL, Somsouk M, Shah SC, Day LW. Commentary: Towards an effective and safe treatment of small intestine bacterial overgrowth - Authors' reply. Aliment Pharmacol Ther. 2013 Dec; 38(11-12):1411. PMID: 24206377.
        View in: PubMed
      20. Day LW, Bhuket T, Allison J. FIT testing: an overview. Curr Gastroenterol Rep. 2013 Nov; 15(11):357. PMID: 24218070.
        View in: PubMed
      21. Shah SC, Day LW, Somsouk M, Sewell JL. Meta-analysis: antibiotic therapy for small intestinal bacterial overgrowth. Aliment Pharmacol Ther. 2013 Oct; 38(8):925-34. PMID: 24004101; PMCID: PMC3819138.
      22. Sewell JL, Day LW, Tuot DS, Alvarez R, Yu A, Chen AH. A brief, low-cost intervention improves the quality of ambulatory gastroenterology consultation notes. Am J Med. 2013 Aug; 126(8):732-8. PMID: 23791206; PMCID: PMC3730533.
      23. Day LW, Bhuket T, Inadomi JM, Yee HF. Diversity of endoscopy center operations and practice variation across California's safety-net hospital system: a statewide survey. BMC Res Notes. 2013; 6:233. PMID: 23767938; PMCID: PMC3693938.
      24. Day LW, Michelle N, Sewell JL. . Open Journal of Gastroenterology. Patient preferences and factors related to the pre-procedure process at a large, urban county hospital. 2013; 3:5-11.
      25. Siao D, Thoeni R, Grenert JP, Day LW. A rare presentation of abdominal pain: idiopathic mesenteric phlebosclerosis. Am J Gastroenterol. 2012 Nov; 107(11):1759-60. PMID: 23160302.
        View in: PubMed
      26. Day LW, Kwon A, Inadomi JM, Walter LC, Somsouk M. Adverse events in older patients undergoing colonoscopy: a systematic review and meta-analysis. Gastrointest Endosc. 2011 Oct; 74(4):885-96. PMID: 21951478; PMCID: PMC3371336.
      27. Day LW, Cello JP, Somsouk M, Inadomi JM. Prevalence of gastric cancer versus colorectal cancer in Asians with a positive fecal occult blood test. Indian J Gastroenterol. 2011 Sep; 30(5):209-16. PMID: 21948130.
        View in: PubMed
      28. Day LW, Walter LC, Velayos F. Colorectal cancer screening and surveillance in the elderly patient. Am J Gastroenterol. 2011 Jul; 106(7):1197-206;quiz 1207. PMID: 21519362.
        View in: PubMed
      29. Day LW, Espey DK, Madden E, Segal M, Terdiman JP. Screening prevalence and incidence of colorectal cancer among American Indian/Alaskan natives in the Indian Health Service. Dig Dis Sci. 2011 Jul; 56(7):2104-13. PMID: 21234688; PMCID: PMC3112488.
      30. Day LW, Cello JP, Madden E, Segal M. Prospective assessment of inpatient gastrointestinal consultation requests in an academic teaching hospital. Am J Gastroenterol. 2010 Mar; 105(3):484-9. PMID: 20203634.
        View in: PubMed
      31. Cello JP, Day LW. Idiopathic AIDS enteropathy and treatment of gastrointestinal opportunistic pathogens. Gastroenterology. 2009 May; 136(6):1952-65. PMID: 19457421.
        View in: PubMed
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