Licensure

• California
  1991 to current

Awards & Honors

• Physician of Excellence
  Orange County Medical Association, CA
  2015, 2016, 2017
  
  
• Spirit of Volunteerism Award - 2016
  "One OC"/"Access OC" - A Medical Non-Profit Organization
  
  
• Glaxo Fellow’s Award
  Digestive Disease Week
  American Gastroenterological Association
  New Orleans, Louisiana
  
  

• McNeil Award for Outstanding Resident Abstract     
  Department of Medicine
  East Carolina University School of Medicine

• Best Research Poster Award           
  American College of Physicians, North Carolina Chapter

Publications

Original Articles

• Chaurasia OP, Marcuard SP, Seidel ER. Insulin-like growth factor I in human gastrointestinal exocrine secretions.  Regulatory Peptides  50:113-119, 1994.
  
  
• Chaurasia OP, Chang KJ. A novel technique for percutaneous endoscopic gastrojejunostomy tube placement. Gastrointest Endosc 42:165-168, 1995.
  
  
• Irwin FL Jr, Sarfeh IJ, Tanoue K, Chaurasia OP, Tarnawski A.  The role of extracellular matrix in injury to gastric mucosa by indomethacin.  J Clin Gastroenterol 21 Suppl 1:S18-23, 1995.
  
  
• Chaurasia OP, Rauws EAJ, Fockens P, Huibregtse K.  Endoscopic techniques for retrieval of proximally migrated biliary stents: the Amsterdam experience.  Gastrointest Endosc 50:780-785, 1999.


• Shankar U, Prasad M, Chaurasia OP. A rare case of langerhans cell histiocytosis of the gastrointestinal tract. World J Gastro­enterol 2012; 18(12): 1410-1413.

Letters To The Editor

• Chaurasia OP. Percutaneous Endoscopic Gastro-jejunostomy tube placement. Gastrointest Endosc 47:433-434, 1998.

Abstracts

• Chaurasia OP, Marcuard SP, Pennington SN, Seidel ER. Characterization of Insulin-like Growth Factor I (IGF-I) in Human pancreatic juice and regulation of its secretion by secretin.  Gastroenterology  100:A517,  1991.
  
  
• Chaurasia OP, Marcuard SP.  Phenytoin and Histamine H2 receptor antagonist interaction: Clinical significance.  Gastroenterology  100:A41, 1991.
  
  
• Chaurasia OP, Marcuard SP, Seidel ER.  Absence of Insulin-like Growth Factor I (IGF-I) binding protein in Human exocrine secretions.  Gastroenterology  102:A725, 1992.
  
  
• Chaurasia OP, Wyle FA, Horansky E, Tarnawski A.  Helicobacter pylori cytotoxin inhibits expression of proliferating cell nuclear antigen (PCNA) in cultured gastric cells (KATO III).  Gastroenterology  106:A663, 1994.
  
  
• Chang K, Chaurasia OP, Albers CG, Wuerker R.  Endoscopic ultrasound guided fine needle aspiration (FNA) in the evaluation of extrinsic lesions adjacent to the lower gastrointestinal tract.  Gastrointest Endosc 40:P61, 1994.
  
  
• Chaurasia OP, Wyle FA, Domek MJ, Knudsen K, Mehrabian H, Tarnawski A.  Expression of ICAM-1 in cultured gastric cells (KATO III)  and its upregulation by TNF-a: Flow cytometric and Northern blot analyses. Gastroenterology 108:A795, 1995.
  
  
• Chang K, Chaurasia OP, Albers CG, Wuerker R.  Endoscopic ultrasound guided fine needle aspiration (FNA) in the evaluation of extrinsic lesions adjacent to the lower gastrointestinal tract.  Gastrointest Endosc 40:P61, 1994.
  
  
• Chaurasia OP, Wyle FA, Domek MJ, Knudsen K, Mehrabian H, Tarnawski A.  Expression of ICAM-1 in cultured gastric cells (KATO III)  and its upregulation by TNF-a: Flow cytometric and Northern blot analyses. Gastroenterology 108:A795, 1995.
  
  
• Chang KJ, Erickson RA, Chaurasia OP.  Preparing for ERSCP (Endo-Radio-Sono CholangioPancreatography); Training the pancreatico-biliary endoscopist in EUS.  Gastrointest Endosc 41:318, 1995.
  
  
• Albers CG, Chaurasia OP. Hepatic amyloidosis mimicking intrahepatic sclerosing cholangitis on ERCP.  Am J Gastroenterol 90:1669, 1995.
  
  
• Chang KJ, Amin AN, Chaurasia OP, Lin RS.  A novel “thin scope” technique for percutaneous endoscopic gastrojejunostomy (PEGJ) tube placement.  Gastrointest Endosc 43:349, 1996.


• Shankar, U, Prasad, M, Chaurasia, OP. A Rare Case of Langerhans Cell Histiocytosis of the
  
Gastrointestinal Tract: World J Gastroenterol 2012 March 28; 18(12): 1410-1413.


• Prasad, M, Shankar, U, Chaurasia, OP. Mantle Cell Lymphoma Presenting As Multiple Colonic Polyp: Case Report and Review of the Literature. Am J Gastroenterol 106: S316; doi:10.1038/ajg.2011.336-7.
  

Presentations

International

• 10th World Congress of Gastroenterology, Los Angeles 1994. Poster presentation. "In vitro inhibition of the S-phase proliferating cell nuclear antigen by Helicobacter pylori cytotoxin: A flow cytometric analysis".
  
  
• 10th World Congress of Gastroenterology, Los Angeles 1994. Poster presentation. "Endoscopic ultrasound guided Fine Needle Aspiration in the evaluation of extrinsic lesions adjacent to the lower gastrointestinal tract".

National

• 92nd Meeting of the American Gastroenterological Association, New Orleans, Louisiana, May 19-22, 1991. Poster presentation: "Characterization of Insulin-like Growth Factor I (IGF-I) in human pancreatic juice and regulation of its secretion by secretin".
  
  
• 93rd Meeting of the American Gastroenterological Association, San Francisco, California, May 10-13, 1992. Poster presentation: "Absence of Insulin-like Growth Factor I (IGF-I) binding protein in human gastrointestinal secretions”.
  
  
• 95th Meeting of the American Gastroenterological Association, New Orleans, Louisiana, May 15-18, 1994. Poster presentation: "Helicobacter pylori cytotoxin inhibits expression of proliferating cell nuclear antigen (PCNA) in cultured gastric cells (KATO III)".
  
  
• Experimental Biology 95TM (FASEB), Atlanta, Georgia, April 9-13, 1995. Oral presentation at a  Symposium on Helicobacter pylori and gastroduodenal ulcer disease: "Overview of pathogenesis of Helicobacter pylori-associated peptic ulcer disease".

State

• Scientific meeting of the American College of Physicians, North Carolina Chapter, Raleigh, NC, February 22-24, 1991. Poster presentation: "In vivo secretin stimulation of Insulin-like Growth Factor I from human pancreas".

• Scientific meeting of the American College of Physicians, North Carolina Chapter, Raleigh, NC, February 21-23, 1992. "Sunday School" - Chief Residents' Oral Case Presentation: "Eosinophilic pneumonia: A diagnostic dilemma".

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