ºÚÁÏÍø±¬³Ô¹Ï

Email

nikhalaf@bcm.edu

Positions

Assistant Professor (tenure track)

Medicine
Gastroenterology and Hepatology
ºÚÁÏÍø±¬³Ô¹Ï of Medicine
Houston, TX, US

Staff Physician

Gastroenterology
Michel E. DeBakey VA Medical Center (MEDVAMC)
Houston, Texas, United States

Core Faculty Member

Health Policy, Quality & Informatics (HPQI) Program
Center for Innovations in Quality, Effectiveness and Safety (IQuESt)
Houston, Texas, United States

Education

MD from ºÚÁÏÍø±¬³Ô¹Ï of Medicine

05/2011 - Houston

Residency at ºÚÁÏÍø±¬³Ô¹Ï of Medicine

05/2014 - Houston

Internal Medicine

Residency at ºÚÁÏÍø±¬³Ô¹Ï of Medicine

06/2015 - Houston

Chief Medical Resident

Clinical Fellowship at Brigham and Women's Hospital

06/2018 - Boston

Gastroenterology and Hepatology

MPH from Harvard T.H. Chan School of Public Health

06/2018 - Boston

Epidemiology

Certifications

American Board of Internal Medicine

Board certified in Internal Medicine.

American Board of Internal Medicine

Board certified in Gastroenterology & Hepatology.

Honors & Awards

Norton Rose Fulbright (NRF) Faculty Excellence Award - Teaching and Evaluation

ºÚÁÏÍø±¬³Ô¹Ï of Medicine (05/2025)

Selected for the 2024 class of the National Academy of Medicine Scholars in Diagnostic Excellence program.

Funded by the Gordon and Betty Moore Foundation, this collaborative program in partnership with the Council of Medical Specialty Societies offers a one-year, part-time experience for exceptional professionals to advance their diagnostic skills, make significant contributions to improve clinical diagnosis at the national level, and accelerate their career development as national leaders in the field

Gordon and Betty Moore Foundation (07/2024 - 06/2025)

Selected Publications

• Sharara A, Mokahal A, Harb A, Khalaf N, et al.. " " World Journal of Gastroenterology. 2020 Oct ;
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• Babic A, Zhang X, Moralez-Oyarvide V, Yuan C, Khalaf N, et al.. " " Br J Cancer. 2020 ;
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• Babic, A., Rosenthal, M.H., Sundaresan, T.K., Khalaf, N, et al. " " Nat Commun. 2023 Jul 18; 14 (1) : 4317.
  Pubmed PMID: .
• Qian ZR, Rubinson DA, Nowak JA, Morales-Oyarvide V, Dunne RF, Kozak MM, Welch MW, Brais LK, Da Silva A, Li T, Li W, Masuda A, Yang J, Shi Y, Gu M, Masugi Y, Bui J, Zellers CL, Yuan C, Babic A, Khalaf N, et al. " " JAMA Oncology. 2018 Mar ; 4 (3) : e173420.
  Pubmed PMID: .
• Khalaf N, El-Serag H, Abrams H, Thrift A. " Burden of Pancreatic Cancer: From Epidemiology to Practice. " Clinical Gastroenterology and Hepatology. 2019 ;
• Khalaf N, Ali B.. " " Gastroenterology. 2022 Jun ; 162 (7) : 2113-2120.
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• Murthy S, Khalaf N, Shah S, Ma B, Goldsmith C, Kass J. " " JAMA Neurology. 2013 ; 70 : 1580-1.
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• Khalaf N, Crews J, DuPont HL, Koo HL. " " Discovery Medicine. ; 14 : 105-13.
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• Saini SD, Schoenfeld P, Goebel S, von Rosenvinge EC ... Khalaf N, et al.. " " JAMA Netw Open. 2023 Jul 3; 6 (7) : e2321730.
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• Khalaf N, Liu Y, Kramer JR, El-Serag HB, Kanwal F, Singh H. " " Clin Gastroenterol Hepatol. 2024 Jul 27;
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• Claridge H, Price CA, Ali R, Cooke E, de Lusignan S, Harvey-Sullivan A, Hodges C, Khalaf N, et al. " " BMJ Open. 2024 Jan 22; 14 (1) : e079863.
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• Khalaf N, Kramer J, Liu Y, Abrams D, Singh H, El- Serag HB, Kanwal F. " " Dig Dis Sci.. 2023 Sep ; 68 (9) : 3634-3643.
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• Yuan C, Babic A, Khalaf N, et al.. " " JAMA Oncol. 2020 Oct ; 6 (10) : e202948.
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• Szafron D, Kim H, Turin C, Benzi E, Khalaf N, Hernaez R. " Duodenal and liver lesions in an adult with generalized weakness. " Gut. 2019 ;
• Khalaf N, Ali B, Liu Y, Kramer JR, El-Serag H, Kanwal F, Singh H. " " Dig Dis Sci. 2023 Dec 16; 69 (2) : 603-614.
  Pubmed PMID: .
• Hamada T, Yuan C, Yurgelun MB, Perez K, Khalaf N, et al. " " Br J Cancer. 2019 Apr ; 120 (8) : 848-854.
  Pubmed PMID: .
• Yurgelun M, Chittenden A, Morales V, Dunne R, Kozak M, Quian ZR, Welch M, Brais L, Da Silva A, Bui J, Yuan C, Li T, Li W, Masuda A, Gu M, Bullock A, Chang D, Clancy T, Linehan D, Findeis-Hosey J, Doyle L, Thorner A, Ducar M, Wollison B, Khalaf N, et al. " " Genetics in Medicine. 2019 Jan ; 21 (1) : 213-223.
  Pubmed PMID: .
• Khalaf N, Mittal S. " " Image of the Month, Clinical Gatroenterology and Hepatology. 2014 ; 12 (6) : A29-30.
  Pubmed PMID: .
• Zaid M, Elganainy D, Dogra P, Dai A, Widmann L, Fernandes P, Wang Z, Pelaez MJ, Ramirez JR, Singhi A, Dasyam A, Brand R, Park W, Rahmanuddin S, Rosenthal M, Wolpin B, Khalaf N, et al.. " " Frontiers in Oncology. 2020 Dec 2; 10
  Pubmed PMID: .
• Jacob J, Millien V, Berger S, Ketwaroo A, Flores A, Hernaez A, Hou J, Jarbrink Sehgal M, Khalaf N, et al.. " " J Clin Gastroenterol.. 2023 Jul ; 58 (5) : 432-439.
  Pubmed PMID: .
• Khalaf N, El-Serag H, Kuzniarek J, Ramsey D, Tabasi S, White D, Kanwal F. " " Clinical Gastroenterology and Hepatology. 2015 ; 13 : 1521-1531.
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• Khalaf N, Anish R, Buehler G. " " Journal of Emergency Medicine. 2014 ; 46 : 113-6.
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• Khalaf N, Felice F, Sejpal D. " Jejunal Dieulafoy’s Lesion: A Rare Cause of Lower Gastrointestinal Bleed. " Practical Gastroenterology. 2014 ; 37 (10)
• Morales-Oyarvide V, Rubinson DA, Dunne RF, Kozak MM, Bui JL, Yuan C, Qian ZR, Babic A, Da Silva A, Nowak JA, Khalaf N, et al. " " Br J Cancer. 2017 Dec ; 117 (12) : 1874-1882.
  Pubmed PMID: .
• Khalaf N, Wolpin BW. " " Gastroenterology. 2019 May ; 156 : 1560-1563.
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• 12. Khalaf N, Ying J, Mittal S, Temple S, El-Serag H. " " Clinical Gastroenterology and Hepatology. 2016 ; 16 : 30517-1.
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• Khalaf N, Ali B.. " " Clinical Gastroenterology and Hepatology. 2022 Sep ; 20 (9) : 1927-1930.
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• Khalaf N, Nguyen T, Ramsey D, El-Serag H. " " Clinical Gastroenterology and Hepatology. 2014 ; 12 : 1832-9.
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• Millenia V, Abrams D, Khalaf N. " Not all terminal ileitis is Crohn’s disease: Intestinal tuberculosis causing small bowel obstruction. " Clinical Gastroenterology and Hepatology. 2020 ;
• Khalaf N, Kramer J, Ramsey D, El-Serag H. " " Diseases of the Esophagus. 2015 ; 28 : 283-90.
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• Hamada T, Khalaf N, Yuan C, et al. " " Clinical Gastroenterology and Hepatology. 2018 Aug ; 16 (8) : 1300-1306.
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• Yuan C, Morales-Oyarvide V, Khalaf N, et al.. " " J Natl Cancer Inst.. 2021 Sep 4; 113 (9) : 1186-1193.
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• Hamada T, Yan C, Bao Y, Zhang M, Khalaf N, et al. " " Cancer Epidemiol Biomarkers Prev.. 2019 Aug 19; 28 (11) : 1868-1875.
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• Pan S, Brand R, Lai L, Dawson D, Donahue T, Kim S, Khalaf N, et al.. " " Clin Transl Med.. 2021 Aug ; 11 (8) : e506.
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• Abrams H, Lee M, Dahdal S, Khalaf N. " " ACG Case Reports. 2020 Oct 26; 7 (10) : e00469.
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• Khalaf N, Yuan C, Tsuyoshi Hamada, et al. " " 2018 Apr ; 154 (5) : 1380-1390.
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• Khan N, Husain SA, Husain SI, Khalaf N, George J, Raissi F, Segura A, Biswajit K, Bogaev R, Frazier O. " " Texas Heart Institute Journal. 2012 ; 39 : 554-556.
  Pubmed PMID: .
• Sharara A, Mokahal A, Harb A, Khalaf N, et al.. " " World Journal of Gastroenterology. 2020 Oct 7; 26 (37) : 5705-5717.
  Pubmed PMID: .
• Hamada T, Khalaf N, Yuan C, et al. " " Journal of Gastroenterology. 2018 Aug ; 53 (8) : 959-966.
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• Khalaf N, Xu A, Nguyen T, Kramer J, Liu Y, Singh H, El-Serag, Kanwal F.. " " Pancreas. 2024 Jan 1; 53 (1) : e27-e33.
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• Khalaf N, El-Serag H, Kanwal F, et al.. " " Gastroenterology,. 2020 Sep ; 159 (3) : 1184-1185.
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• Jiang K, Bazarbashi AN, Dahdal S, Voiculescu A, Khalaf N. " " Case Reports Hepatol. 2018 Aug ; 23 : 5876718.
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• 3. Srivatsav A, Ghanayem R, Dahdal S, Khalaf N. " Treatment of Esophageal Stricture After Lye Ingestion: A Case of Dysphagia following Colon Interposition. " ACG Case Reports. 2020 ;
• Khalaf N, Samadder NJ. " " Clinical Gastroenterology and Hepatology. 2019 Mar 12; 3565 (19) : 30259-9.
  Pubmed PMID: .
• Khalaf N, Abrams H, Chemezian E, Kanwal F, El-Serag H.. " " Pancreas. 2022 Feb 1; 51 (2) : e13-e15.
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• Khalaf N, Ali B, Zimolzak A, Liu Y, Wei L, Kanwal F, et al.. " " BMJ Quality & Safety.. 2025 Oct 9;
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• Khalaf N, Ali B, Zimolzak A, Liu Y, El-Serag HB, Kanwal F, et al.. " " Dig Dis Sci.. 2025 Jan ; 70 (1) : 179-181.
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• Khalaf N, Sandoval G, Zimolzak A, Kapadia P, Liu Y, Singh H. " " Br J Cancer. 2026 Apr ; 134 (8) : 1209-1217.
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Show 44 more publications

Memberships

American College of Gastroenterology

Member (01/2015)

Texas Medical Association

Member (01/2014)

American Gastroenterological Association

Member (01/2013)

American College of Physicians

Member (01/2011)

National Arab American Medical Association,

Member (01/2019)

Gold Humanish Honor Society

Inducted Member (01/2010)

Funding

Health Informatics Approaches to Improve Early Diagnosis of Pancreatic Cancer

(04/01/2022 - 09/01/2027)

Grant funding from VA Health Services Research & Development Career Development

Implementing Digital Quality Measures into Learning Health Systems for Diagnostic Excellence in Cancer Care

(07/01/2024 - 06/01/2026)

Grant funding from National Academy of Sciences

Clinical Quality Measures to Improve the Diagnosis for Gastrointestinal Cancers

(09/01/2022 - 12/31/2026)

Grant funding from Gordon and Betty Moore Foundation

Colonoscopy Versus Fecal Immunochemical Test in Reducing Mortality from Colorectal Cancer (CONFIRM) Trial

(05/01/2012 - 12/31/2028)

Grant funding from Cooperative Studies Program

Co-local Site Investigator

Languages

Arabic