Robert Kramer, MD
Professor, Pediatrics-Gastroenterology, Hepatology and Nutrition

Professional Titles

• Co-Medical Director, DHI
• Director of Endoscopy

Recognition & Awards

• Five Star Patient Satisfaction Award, Children's Hospital Colorado (2016)
  Awarded to providers with the highest patient satisfaction ratings from among the CHCO faculty.
• Fellowship Teaching Award, Digestive Health Institute (2012)
  Awarded by Pediatric GI fellows to outstanding faculty educator for excellence in teaching.
• Best Doctors in America, Best Doctors in America (2005)
  2005-present

Research Interests

Teaching

Publications

• Lin TK, Barth B, Fishman DS, Fox VL, Giefer MJ, Gugig R, Kramer RE, Liu QY, Mamula P, McOmber ME, Vitale DS, Wilsey MJ, Troendle DM. Technological imbalance: seeking a small-caliber duodenoscope. Gastrointest Endosc. 2022 Dec;96(6):1055-1057. PubMed PMID: 36007585
• Walsh CM, Lightdale JR, Fishman DS, Furlano RI, Mamula P, Gillett PM, Narula P, Hojsak I, Oliva S, Homan M, Riley MR, Huynh HQ, Rosh JR, Jacobson K, Tavares M, Leibowitz IH, Utterson EC, Croft NM, Mack DR, Brill H, Liu QY, Bontems P, Lerner DG, Amil-Dias J, Kramer RE, Otley AR, Ambartsumyan L, Connan V, McCreath GA, Thomson MA. Pediatric Endoscopy Quality Improvement Network Pediatric Endoscopy Reporting Elements: A Joint NASPGHAN/ESPGHAN Guideline. J Pediatr Gastroenterol Nutr. 2022 Mar 1;74(S1 Suppl 1):S53-S62. PubMed PMID: 34402488
• Walsh CM, Lightdale JR, Leibowitz IH, Lerner DG, Liu QY, Mack DR, Mamula P, Narula P, Oliva S, Riley MR, Rosh JR, Tavares M, Utterson EC, Amil-Dias J, Bontems P, Brill H, Croft NM, Fishman DS, Furlano RI, Gillett PM, Hojsak I, Homan M, Huynh HQ, Jacobson K, Ambartsumyan L, Otley AR, Kramer RE, McCreath GA, Connan V, Thomson MA. Pediatric Endoscopy Quality Improvement Network Quality Standards and Indicators for Pediatric Endoscopists and Endoscopists in Training: A Joint NASPGHAN/ESPGHAN Guideline. J Pediatr Gastroenterol Nutr. 2022 Mar 1;74(S1 Suppl 1):S44-S52. PubMed PMID: 34402487
• Lightdale JR, Walsh CM, Oliva S, Jacobson K, Huynh HQ, Homan M, Hojsak I, Gillett PM, Furlano RI, Fishman DS, Croft NM, Brill H, Bontems P, Amil-Dias J, Utterson EC, Tavares M, Rosh JR, Riley MR, Narula P, Mamula P, Mack DR, Liu QY, Lerner DG, Leibowitz IH, Otley AR, Kramer RE, Ambartsumyan L, Connan V, McCreath GA, Thomson MA. Pediatric Endoscopy Quality Improvement Network Quality Standards and Indicators for Pediatric Endoscopic Procedures: A Joint NASPGHAN/ESPGHAN Guideline. J Pediatr Gastroenterol Nutr. 2022 Mar 1;74(S1 Suppl 1):S30-S43. PubMed PMID: 34402486
• Lightdale JR, Walsh CM, Narula P, Utterson EC, Tavares M, Rosh JR, Riley MR, Oliva S, Mamula P, Mack DR, Liu QY, Lerner DG, Leibowitz IH, Jacobson K, Huynh HQ, Homan M, Hojsak I, Gillett PM, Furlano RI, Fishman DS, Croft NM, Brill H, Bontems P, Amil-Dias J, Kramer RE, Ambartsumyan L, Otley AR, McCreath GA, Connan V, Thomson MA. Pediatric Endoscopy Quality Improvement Network Quality Standards and Indicators for Pediatric Endoscopy Facilities: A Joint NASPGHAN/ESPGHAN Guideline. J Pediatr Gastroenterol Nutr. 2022 Mar 1;74(S1 Suppl 1):S16-S29. PubMed PMID: 34402485
• Walsh CM, Lightdale JR, Mack DR, Amil-Dias J, Bontems P, Brill H, Croft NM, Fishman DS, Furlano RI, Gillett PM, Hojsak I, Homan M, Huynh HQ, Jacobson K, Leibowitz IH, Lerner DG, Liu QY, Mamula P, Narula P, Oliva S, Riley MR, Rosh JR, Tavares M, Utterson EC, Ambartsumyan L, Otley AR, Kramer RE, Connan V, McCreath GA, Thomson MA. Overview of the Pediatric Endoscopy Quality Improvement Network Quality Standards and Indicators for Pediatric Endoscopy: A Joint NASPGHAN/ESPGHAN Guideline. J Pediatr Gastroenterol Nutr. 2022 Mar 1;74(S1 Suppl 1):S3-S15. PubMed PMID: 34402484
• Nguyen N, Kramer RE, Menard-Katcher C. Endoscopy in Pediatric Eosinophilic Esophagitis. Front Pediatr. 2021;9:713027. PubMed PMID: 34504816
• Lightdale JR, Walsh CM, Fishman DS, Furlano RI, Mamula P, Gillett PM, Narula P, Hojsak I, Oliva S, Homan M, Riley MR, Huynh HQ, Rosh JR, Jacobson K, Tavares M, Leibowitz IH, Utterson EC, Croft NM, Mack DR, Brill H, Liu QY, Bontems P, Lerner DG, Amil-Dias J, Kramer RE, Otley AR, Ambartsumyan L, Connan V, McCreath GA, Thomson MA. Pediatric Endoscopy Quality Improvement Network (PEnQuIN) Pediatric Endoscopy Reporting Elements: A Joint NASPGHAN/ESPGHAN Guideline. J Pediatr Gastroenterol Nutr. 2021 Aug 16. [Epub ahead of print] PubMed PMID: 34402488
• Walsh CM, Lightdale JR, Leibowitz IH, Lerner DG, Liu QY, Mack DR, Mamula P, Narula P, Oliva S, Riley MR, Rosh JR, Tavares M, Utterson EC, Amil-Dias J, Bontems P, Brill H, Croft NM, Fishman DS, Furlano RI, Gillett PM, Hojsak I, Homan M, Huynh HQ, Jacobson K, Ambartsumyan L, Otley AR, Kramer RE, McCreath GA, Connan V, Thomson MA. Pediatric Endoscopy Quality Improvement Network (PEnQuIN) Quality Standards and Indicators for Pediatric Endoscopists and Endoscopists in Training: A Joint NASPGHAN/ESPGHAN Guideline. J Pediatr Gastroenterol Nutr. 2021 Aug 16. [Epub ahead of print] PubMed PMID: 34402487
• Lightdale JR, Walsh CM, Oliva S, Jacobson K, Huynh HQ, Homan M, Hojsak I, Gillett PM, Furlano RI, Fishman DS, Croft NM, Brill H, Bontems P, Amil-Dias J, Utterson EC, Tavares M, Rosh JR, Riley MR, Narula P, Mamula P, Mack DR, Liu QY, Lerner DG, Leibowitz IH, Otley AR, Kramer RE, Ambartsumyan L, Connan V, McCreath GA, Thomson MA. Pediatric Endoscopy Quality Improvement Network (PEnQuIN) Quality Standards and Indicators for Pediatric Endoscopic Procedures: A Joint NASPGHAN/ESPGHAN Guideline. J Pediatr Gastroenterol Nutr. 2021 Aug 16. [Epub ahead of print] PubMed PMID: 34402486
• Lightdale JR, Walsh CM, Narula P, Utterson EC, Tavares M, Rosh JR, Riley MR, Oliva S, Mamula P, Mack DR, Liu QY, Lerner DG, Leibowitz IH, Jacobson K, Huynh HQ, Homan M, Hojsak I, Gillett PM, Furlano RI, Fishman DS, Croft NM, Brill H, Bontems P, Amil-Dias J, Kramer RE, Ambartsumyan L, Otley AR, McCreath GA, Connan V, Thomson MA. Pediatric Endoscopy Quality Improvement Network (PEnQuIN) Quality Standards and Indicators for Pediatric Endoscopy Facilities: A Joint NASPGHAN/ESPGHAN Guideline. J Pediatr Gastroenterol Nutr. 2021 Aug 16. [Epub ahead of print] PubMed PMID: 34402485
• Walsh CM, Lightdale JR, Mack DR, Amil-Dias J, Bontems P, Brill H, Croft NM, Fishman DS, Furlano RI, Gillett PM, Hojsak I, Homan M, Huynh HQ, Jacobson K, Leibowitz IH, Lerner DG, Liu QY, Mamula P, Narula P, Oliva S, Riley MR, Rosh JR, Tavares M, Utterson EC, Ambartsumyan L, Otley AR, Kramer RE, Connan V, McCreath GA, Thomson MA. Overview of the Pediatric Endoscopy Quality Improvement Network (PEnQuIN) Quality Standards and Indicators for Pediatric Endoscopy: A Joint NASPGHAN/ESPGHAN Guideline. J Pediatr Gastroenterol Nutr. 2021 Aug 16. [Epub ahead of print] PubMed PMID: 34402484
• Mark JA, Kramer RE. Ketorolac Is Safe and Associated With Lower Rate of Post-Endoscopic Retrograde Cholangiopancreatography Pancreatitis in Children With Pancreatic Duct Manipulation. J Pediatr Gastroenterol Nutr. 2021 Oct 1;73(4):542-547. PubMed PMID: 34321424
• Grey NEO, Malone LJ, Miller AL, Carroll HF, Khalaf RT, Kramer RE, Browne LP. Magnetic resonance imaging findings following button battery ingestion. Pediatr Radiol. 2021 Sep;51(10):1856-1866. PubMed PMID: 34075452
• Ruan W, Fishman DS, Kramer RE, Walker T, Khalaf RT. Endoscopic Management of Button Batteries. J Pediatr Gastroenterol Nutr. 2021 Aug 1;73(2):e48-e49. PubMed PMID: 34016880
• Boster JM, Iwanowski M, Kramer RE. Management of Pediatric Postendoscopy Fever: Reducing Unnecessary Health Care Utilization With a Clinical Care Guideline. J Pediatr Gastroenterol Nutr. 2021 Feb 1;72(2):250-254. PubMed PMID: 32925556
• Khalaf, Racha T.; Rosenwald, Kent; Zhou, Wenru; Pan, Zhaoxing; Kramer, Robert E.; Menard-Katcher, Calies. Quality Improvement Initiative to Improve Endoscopic Reassessment of Eosinophilic Esophagitis, JPGN Reports: August 2021 - Volume 2 - Issue 3 - p e104
• Boster JM, Iwanowski M, Kramer RE. Management of Pediatric Post-Endoscopy Fever: Reducing Unnecessary Healthcare Utilization with a Clinical Care Guideline. J Pediatr Gastroenterol Nutr. 2020 Sep 8. [Epub ahead of print] PubMed PMID: 32925556
• Kramer RE. The Refinement of Radiographic Protocols in Assessment of Pediatric Foreign Body Ingestions: Location, Location, Location. J Pediatr Gastroenterol Nutr. 2020 Oct;71(4):e135-e136. PubMed PMID: 32740517
• Ogle S, Derderian SC, Kramer R, Anthony R, Inge T. The role of preoperative upper endoscopy in adolescents undergoing laparoscopic vertical sleeve gastrectomy. Surg Obes Relat Dis. 2020 Sep;16(9):1212-1217. PubMed PMID: 32576512
• Khalaf RT, Ruan W, Orkin S, Wilsey M, Fishman DS, Mallon D, Pan Z, Hazleton KZ, Kramer RE, Walker T. Gastric injury secondary to button battery ingestions: a retrospective multicenter review. Gastrointest Endosc. 2020 Aug;92(2):276-283. PubMed PMID: 32334020
• Mark JA, Underberg K, Kramer RE. Results of duodenoscope culture and quarantine after manufacturer-recommended cleaning process. Gastrointest Endosc. 2020 Jun;91(6):1328-1333. PubMed PMID: 31945325
• Brumbaugh D, Furuta G, Hoffenberg E, Kobak GE, Kramer RE, Setter SS, Shull M, Soden J, Walker T. Current Diagnosis and Treatment: Pediatrics. 25th Ed. New York: McGraw Hill; c2020. Chapter 2, Gastrointestinal Tract; p. 615-656.
• Mark JA, Anderson BT, Pan Z, Menard-Katcher C, Kramer RE. Comparative Analysis of Adverse Events After Esophageal Balloon and Bougie Dilations in Children. J Pediatr Gastroenterol Nutr. 2019 May;68(5):630-634. PubMed PMID: 30562312
• Mark JA, Campbell K, Gao D, Kramer RE. Algorithm to Predict Which Children With Chronic Abdominal Pain Are Low Suspicion for Significant Endoscopic Findings. Clin Pediatr (Phila). 2019 Jan;58(1):79-87. PubMed PMID: 30306797
• Nguyen N, Lavery WJ, Capocelli KE, Smith C, DeBoer EM, Deterding R, Prager JD, Leinwand K, Kobak GE, Kramer RE, Menard-Katcher C, Furuta GT, Atkins D, Fleischer D, Greenhawt M, Friedlander JA. Transnasal Endoscopy in Unsedated Children With Eosinophilic Esophagitis Using Virtual Reality Video Goggles. Clin Gastroenterol Hepatol. 2019 Nov;17(12):2455-2462. PubMed PMID: 30708107
• Mark JA, Campbell K, Gao D, Kramer RE. Algorithm to Predict Which Children With Chronic Abdominal Pain Are Low Suspicion for Significant Endoscopic Findings. Clin Pediatr (Phila). 2018 Oct 11;:9922818806317. [Epub ahead of print] PubMed PMID: 30306797
• Mark JA, Nguyen N, Rosenwald K, Brumbaugh DE, Kramer RE. Retrieval of 28 Rare Earth Magnets From the Small Bowel With Antegrade Single Balloon Enteroscopy. J Pediatr Gastroenterol Nutr. 2018 Nov;67(5):e105. PubMed PMID: 30063583
• Anderson BT, Feinstein JA, Kramer RE, Narkewicz MR, Bruckner AL, Brumbaugh DE. The approach and safety of esophageal dilation for treatment of strictures in children with epidermolysis bullosa. J Pediatr Gastroenterol Nutr. 2018 Jul 26. [Epub ahead of print] PubMed PMID: 30052567
• Mark JA, Kramer RE. Impact of fellow training level on adverse events and operative time for common pediatric GI endoscopic procedures. Gastrointest Endosc. 2018 Nov;88(5):787-794. PubMed PMID: 30031806
• Khalaf RT, Gurevich Y, Marwan AI, Miller AL, Kramer RE, Sahn B. Button Battery Powered Fidget Spinners: A Potentially Deadly New Ingestion Hazard for Children. J Pediatr Gastroenterol Nutr. 2018 Apr;66(4):595-597. PubMed PMID: 29369847
• Nguyen N, Kramer RE, Friedlander JA. Videocapsule Endoscopy Identifies Small Bowel Lesions in Patients With Eosinophilic Enteritis. Clin Gastroenterol Hepatol. 2018 Jun;16(6):e64-e65. PubMed PMID: 28870663
• Mark JA, Mack CL, Marwan AI, Kramer RE. Use of Fully Covered Self-expanding Metal Biliary Stents in Pediatrics: A Case Series. J Pediatr Gastroenterol Nutr. 2018 Mar;66(3):e71-e75. PubMed PMID: 28837510
• Hall CHT, Nguyen N, Furuta GT, Prager J, Deboer E, Deterding R, Menard-Katcher C, Capocelli KE, Kramer RE, Friedlander JA. Unsedated In-office Transgastrostomy Esophagoscopy to Monitor Therapy in Pediatric Esophageal Disease. J Pediatr Gastroenterol Nutr. 2018 Jan;66(1):33-36. PubMed PMID: 28505050
• Nguyen N, Kramer RE, Friedlander JA. Videocapsule Endoscopy Identifies Small Bowel Lesions in Patients With Eosinophilic Enteritis. Clin Gastroenterol Hepatol. 2017 Sep 1. [Epub ahead of print] PubMed PMID: 28870663
• Mark JA, Mack CL, Marwan AI, Kramer RE. Use of Fully Covered Self-Expanding Metal Biliary Stents in Pediatrics: A Case Series. J Pediatr Gastroenterol Nutr. 2017 Aug 23. [Epub ahead of print] PubMed PMID: 28837510
• Kramer RE, Walsh CM, Lerner DG, Fishman DS. Quality Improvement in Pediatric Endoscopy: A Clinical Report From the NASPGHAN Endoscopy Committee. J Pediatr Gastroenterol Nutr. 2017 Jul;65(1):125-131. PubMed PMID: 28644360
• Hall CHT, Nguyen N, Furuta GT, Prager J, Deboer E, Deterding R, Menard-Katcher C, Capocelli KE, Kramer RE, Friedlander JA. Unsedated in Office Transgastrostomy Esophagoscopy (TGE) to Monitor Therapy in Pediatric Esophageal Disease. J Pediatr Gastroenterol Nutr. 2017 May 12. [Epub ahead of print] PubMed PMID: 28505050
• Menard-Katcher C, Furuta GT, Kramer RE. Dilation of Pediatric Eosinophilic Esophagitis: Adverse Events and Short-term Outcomes. J Pediatr Gastroenterol Nutr. 2017 May;64(5):701-706. PubMed PMID: 28055990
• Ing RJ, Kramer RE, Darst J, Mayes LM, Twite MD. Button battery ingestion in children: a role for angiography?. Can J Anaesth. 2017 Mar;64(3):321-322. PubMed PMID: 27804024
• Friedlander JA, Liu QY, Sahn B, Kooros K, Walsh CM, Kramer RE, Lightdale JR, Khlevner J, McOmber M, Kurowski J, Giefer MJ, Pall H, Troendle DM, Utterson EC, Brill H, Zacur GM, Lirio RA, Lerner DG, Reynolds C, Gibbons TE, Wilsey M, Liacouras CA, Fishman DS. NASPGHAN Capsule Endoscopy Clinical Report. J Pediatr Gastroenterol Nutr. 2017 Mar;64(3):485-494. PubMed PMID: 27642781
• Ing RJ, Kramer RE, Darst J, Mayes LM, Twite MD. Button battery ingestion in children: a role for angiography?. Can J Anaesth. 2016 Nov 1. [Epub ahead of print] PubMed PMID: 27804024
• Kramer RE, Narkewicz MR. Adverse Events Following Gastrointestinal Endoscopy in Children: Classifications, Characterizations and Implications. J Pediatr Gastroenterol Nutr. 2015 Nov 19. [Epub ahead of print] PubMed PMID: 26594830
• Friedlander JA, DeBoer EM, Soden JS, Furuta GT, Menard-Katcher CD, Atkins D, Fleischer DM, Kramer RE, Deterding RR, Capocelli KE, Prager JD. Unsedated transnasal esophagoscopy for monitoring therapy in pediatric eosinophilic esophagitis. Gastrointest Endosc. 2015 Jul 2. [Epub ahead of print] PubMed PMID: 26142551
• Kramer RE, Lerner DG, Lin T, Manfredi M, Shah M, Stephen TC, Gibbons TE, Pall H, Sahn B, McOmber M, Zacur G, Friedlander J, Quiros AJ, Fishman DS, Mamula P. Management of ingested foreign bodies in children: a clinical report of the NASPGHAN Endoscopy Committee. J Pediatr Gastroenterol Nutr. 2015 Apr;60(4):562-74. PubMed PMID: 25611037
• Sheiko MA, Feinstein JA, Capocelli KE, Kramer RE. The concordance of endoscopic and histologic findings of 1000 pediatric EGDs. Gastrointest Endosc. 2015 Jun;81(6):1385-91. PubMed PMID: 25440693
• Lerner DG, Li BU, Mamula P, Fishman DS, Kramer R, Goh VL, El-Chammas K, Pentiuk SP, Rothbaum R, Gurrum B, Rahhal RM, Goday PS, Vitola B. Challenges in meeting fellowship procedural guidelines in pediatric therapeutic endoscopy and liver biopsy. J Pediatr Gastroenterol Nutr. 2014 Jan;58(1):27-33. PubMed PMID: 24051484
• Sheiko MA, Feinstein JA, Capocelli KE, Kramer RE. The concordance of endoscopic and histologic findings of 1000 pediatric EGDs. Gastrointest Endosc. 2014 Nov 1. [Epub ahead of print] PubMed PMID: 25440693
• Sauer CG, Kramer RE. Endoscopy assessment: from case logs to competency. J Pediatr Gastroenterol Nutr. 2014 Oct;59(4):427-8. PubMed PMID: 25254297
• Pall H, Zacur GM, Kramer RE, Lirio RA, Manfredi M, Shah M, Stephen TC, Tucker N, Gibbons TE, Sahn B, McOmber M, Friedlander J, Quiros JA, Fishman DS, Mamula P. Bowel preparation for pediatric colonoscopy: report of the NASPGHAN endoscopy and procedures committee. J Pediatr Gastroenterol Nutr. 2014 Sep;59(3):409-16. PubMed PMID: 24897169
• Butz BK, Wen T, Gleich GJ, Furuta GT, Spergel J, King E, Kramer RE, Collins MH, Stucke E, Mangeot C, Jackson WD, O'Gorman M, Abonia JP, Pentiuk S, Putnam PE, Rothenberg ME. Efficacy, dose reduction, and resistance to high-dose fluticasone in patients with eosinophilic esophagitis. Gastroenterology. 2014 Aug;147(2):324-33.e5. PubMed PMID: 24768678
• Lerner DG, Li BU, Mamula P, Fishman DS, Kramer R, Goh VL, El-Chammas K, Pentiuk SP, Rothbaum R, Gurrum B, Rahhal RM, Goday PS, Vitola B. Challenges in meeting fellowship procedural guidelines in pediatric therapeutic endoscopy and liver biopsy. J Pediatr Gastroenterol Nutr. 2014 Jan;58(1):27-33. PubMed PMID: 24051484
• de Zoeten EF, Pasternak BA, Mattei P, Kramer RE, Kader HA. Diagnosis and treatment of perianal Crohn disease: NASPGHAN clinical report and consensus statement. J Pediatr Gastroenterol Nutr. 2013 Sep;57(3):401-12. PubMed PMID: 23974063
• Sheiko MA, Feinstein JA, Capocelli KE, Kramer RE. Diagnostic yield of EGD in children: a retrospective single-center study of 1000 cases. Gastrointest Endosc. 2013 Jul;78(1):47-54.e1. PubMed PMID: 23669024
• Hussain SZ, Bousvaros A, Gilger M, Mamula P, Gupta S, Kramer R, Noel RA. Management of ingested magnets in children. J Pediatr Gastroenterol Nutr. 2012 Sep;55(3):239-42. PubMed PMID: 22785419

Professional Memberships

• North American Society of Pediatric Gastroenterology, Hepatology and Nutrition, Chair of Endoscopy Committee
• American Society of Gastrointestinal Endoscopy, Fellow, ASGE
• American Medical Association, Member
• Society of Pediatric Research, Member