Robert Kramer, MD

Professional Titles

• Director of Clinical Operations
• Director of Endoscopy

Recognitions

• Judith and Henry Sondheimer Professor of Pediatric Gastroenterology, Judith and Henry Sondheimer and University of Colorado (2020)
• 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

Publications

• Joseph M, Schiff R, Mark J, Kramer R. Influence of pediatric ERCP positioning on procedural outcomes: A single-center study. J Pediatr Gastroenterol Nutr. 2024 Dec 16. [Epub ahead of print] PubMed PMID: 39686550
• Shanker AI, Li BUK, Kramer RE. Cannabinoid hyperemesis syndrome co-occurring with superior mesenteric artery syndrome in adolescents. J Pediatr Gastroenterol Nutr. 2024 Sep;79(3):495-500. PubMed PMID: 38994677
• Kramer RE. The Role of Endoscopy in the Management of Adolescent Bariatric Patients: A Primer For Pediatric Gastroenterologists. Curr Gastroenterol Rep. 2023 Nov;25(11):299-307. PubMed PMID: 37787883
• Chu C, Tran P, Moreau C, Mark JA, Kramer RE, Piester TL. A National Survey of the Training and Practice Patterns of Practicing Pediatric Advanced Endoscopists in the United States. J Pediatr Gastroenterol Nutr. 2023 Sep 1;77(3):407-412. PubMed PMID: 37364161
• 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
• Hamilton EC, Kramer RE, Roach JP. Rapunzel Syndrome Presenting as Biliary Obstruction. Journal of Pediatric Surgery Case Reports. 2018:35:32-34.
• Kramer RE, Lerner DG, Walsh CM, Lightdale J. Variation in Quality Metric Tracking Across Pediatric Endoscopy Programs: Is It Time for National Consensus and National Registries? 2018 NASPGHAN Annual Meeting, Hollywood, FL. Poster Presentation.
• Khalaf R, Hazleton KZ, Kramer RE, Walker T, Ruan W, et al. Gastric Injury Secondary to Button Battery Ingestions in Children: A Retrospective Multicenter Review. 2018 NASPGHAN Annual Meeting, Hollywood, FL. Poster Presentation.
• Kramer RE, Lerner DG, Mencin AM, Ahmed N, Troendle DM, Friedlander J. Multicenter Evaluation Of Procedural Volume In Academic Pediatric Gastroenterology Centers. 2018 Digestive Disease Week, Washington DC. Poster Presentation.
• Nguyen N, Lavery W, Capocelli K, Deboer AM, Deterding RR, Prager JD, Smith C, Mesenbrink K, Kramer RE, Furuta G, Friedlander J. Unsedated In-Office Transnasal Endoscopy Is Safe And Effective In Monitoring Disease Activity In Pediatric Eosinophilic Esophagitis And Non-Eosinophilic Esophageal Disease. 2018 Digestive Disease Week, Washington DC. Poster Presentation.
• Kramer RE. Endoscopic Placement of Modified Gastro-Jejunostomy Feeding Tubes in Infants Less Than 10 Kg. Presented at 2018 NASPGHAN Annual Meeting, Endoscopy Video Symposium, Hollywood, FL https://youtu.be/hy-SE69TsoU
• Mark JA, Kramer RE. Removal of Neodymium Magnets in a Toddler Using Antegrade Small Bowel Balloon Enteroscopy. Presented at 2018 NASPGHAN Annual Meeting, Endoscopy Video Symposium, Hollywood, FL https://www.youtube.com/watch?v=DC7zv-G3uXI
• 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
• Kramer RE. Cholecystitis. IN: Waasdorp Hurtado C and Li BK (eds), The NASPGHAN Fellows Concise Review of Pediatric Gastroenterology, Hepatology and Nutrition, Second Edition. Nestle Nutrition Institute, Ambler, PA pp 343-348
• Kramer RE. Choledocholithiasis. IN: Waasdorp Hurtado C and Li BK (eds), The NASPGHAN Fellows Concise Review of Pediatric Gastroenterology, Hepatology and Nutrition, Second Edition. Nestle Nutrition Institute, Ambler, PA pp 337-342
• Menard Katcher CD, Benitez AJ, Ahmed F, Kramer RE, Muir AB. Esophageal Distensibility Provides Measure of Remodeling in Pediatric Eosinophilic Esophagitis. Gastroenterology, April 2016.
• Lirio RA, Walsh C, Rosh JR, Fishman D, Kramer RE, Lightdale JR. Above and Beyond Training: Colonoscopy Learning Curves and Expected Annual Procedural Volume of Credentialed Pediatric Gastroenterologists, Gastrointest Endosc, May 2016.
• Anderson B, Menard Katcher CE, Kramer RE. Stratifying Adverse Events Following Pediatric Esophageal Dilation Procedures. Gastrointest Endosc, May 2016
• Noel G, Sundaram SS, Kramer RE. Small Bowel Balloon Enteroscopy as a Treatment Modality for Retained Biliary Stents after Pediatric Orthotopic Liver Transplantation. Gastrointest Endosc, May 2016. DOI: 10.1016/j.gie.2016.03.496
• Menard-Katcher C, Furuta GT, Kramer RE. Dilation of Pediatric Eosinophilic Esophagitis - Adverse Events and Short Term Outcomes. J Pediatr Gastroenterol Nutr. 2016 Jul 18. [Epub ahead of print] 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. 2016 Nov 1. [Epub ahead of print] 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. 2016 Sep 16. [Epub ahead of print] PubMed PMID: 27642781
• Waasdorp Hurtado C, Sheiko MA, Gralla J, Kinder S, Kramer RE. Effects of Anesthesia on Pediatric pH Impedance. J Pediatr Gastroenterol Nutr. 2016 Aug;63(2):236-41. PubMed PMID: 26720769
• Leinwand K, Brumbaugh DE, Kramer RE. Button Battery Ingestion in Children: A Paradigm for Management of Severe Pediatric Foreign Body Ingestions. Gastrointest Endosc Clin N Am. 2016 Jan;26(1):99-118. PubMed PMID: 26616899
• Kramer RE, Narkewicz MR. Adverse Events Following Gastrointestinal Endoscopy in Children: Classifications, Characterizations, and Implications. J Pediatr Gastroenterol Nutr. 2016 Jun;62(6):828-33. 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. 2016 Feb;83(2):299-306.e1. PubMed PMID: 26142551
• 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
• Fasano A. A clinical guide to gluten-related disorders. 1st ed, Philadelphia: Lippincott Williams & Wilkins;c2014. Section VIII, Difficult Cases; pp 131-67.
• Kramer RE, Hoffenberg EJ, Sondheimer JM, Sundaram S, Furuta G. Chapter 20: Gastrointestinal Tract. In W. Hay (ed): “Current Diagnosis and Treatment: Pediatrics, Twenty-First Edition” McGraw Hill. In Press.
• 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
• Hoffenberg EJ, Kramer RE, Liu E, Friedlander J, Flass T. A Clinical Guide on Gluten Related Disorders, 1st Edition, USA: NASPGHAN Foundation; 2013. Chapter, Difficult Cases.
• 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
• Kramer RE, Chumpitazi C, Gilger M, Noel RA. Episode 1. Recognizing the Serious Risks Posed by Neodymium Magnet Ingestion in Children and Adolescents [Internet]. Flourtown, PA: NASPGHAN Foundation; 2012 May. Available from http://limelightdc.com/clientarea/naspghan_magnets_podcast_5_12/
• Kramer RE, Gilger M, Noel RA. Episode 2. Emergency Management of Magnet Ingestion in Pediatric Patients [Internet]. Flourtown, PA: NASPGHAN Foundation; 2012 May. Available from http://limelightdc.com/clientarea/naspghan_magnets_podcast_5_12/
• Kramer RE, Magnuson D, Gilger M, Noel RA. Episode 3. Endoscopy and Surgical Removal of Magnets in Pediatric Patients. [Internet]. Flourtown, PA: NASPGHAN Foundation; 2012 May. Available from http://limelightdc.com/clientarea/naspghan_magnets_podcast_5_12/
• Kramer RE. A Prospective Study of the Prevalence of Endoscopy-Related Complications in Children. Poster session presented at: Annual conference of the North American Society of Pediatric Gastroenterology, Hepatology and Nutrition; 2012 Oct 18-22; Salt Lake City, UT.
• Brumbaugh DE, Mack CL. Conjugated hyperbilirubinemia in children. Pediatrics in Review. 2012 Jul;33(7):291-302. Figure 1, Biliary drainage with magnification of portal triad.
• Lu B, Sokol R. Medical Care of the Liver Transplant Patient, 4th Ed. West Sussex, UK: Blackwell Publishing LTD; 2012. Chapter 38, Special considerations in pediatric liver transplantation, Figure 1,“Reduced liver allografts”; p 419-430.
• Sundaram S, Kramer RE, Hoffenberg EJ, Sondheimer JM, Furuta G. Current Diagnosis and Treatment: Pediatrics, Twenty-First Edition. USA: McGraw Hill; 2012. Chapter 21, Gastrointestinal Tract; pp 624-659.
• Sheiko M, Feinstein J, Capocelli K, Kramer RE. The diagnostic yield of esophagogastroduodenoscopy in children: A retrospective single center study of 1000 cases. Gastrointest Endosc.
• Mark JA, Anderson BT, Pan Z, Menard-Katcher C, Kramer RE. Comparative Analysis of Adverse Events after Esophageal Balloon and Bougie Dilation in Children. J Pediatr Gastroenterol Nutr 2018- In Press.
• Kramer RE, Brumbaugh D, Shull M, Walker T, Hoffenberg EH, Septer S, Kobak G, Soden J. Chapter 21: Gastrointestinal Tract. In W. Hay (ed): “Current Diagnosis and Treatment: Pediatrics,Twenty-Seventh Edition” McGraw Hill. 2025.
• Kramer RE. Chapter 389: Foreign Body Ingestion. In MW Kline (ed): “Rudolph’s Pediatrics, 24th Edition” McGraw Hill. 2025

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

Practice Locations

• Children's Hospital Colorado
• University of Colorado Hospital

Specialty Information

• Pediatric Gastroenterology, Board Certification (2001, 2009)
• Pediatrics, Board Certification (1998)
• Institute for Healthcare Quality and Safety at University of Colorado, Certificate (2014)

• Food, Nutrition and Metabolism
• Digestive System
• Digestive System - Celiac Disease
• Digestive System - Colonoscopy
• Digestive System - Gastroenterology (Stomach, Bowel, General GI Problems)
• Digestive System - Gastroesophageal Reflux
• Digestive System - Inflammatory Bowel Disease (IBD): Crohn’s disease, ulcerative colitis, microscopic colitis
• Digestive System - Irritable Bowel Syndrome (IBS)
• Digestive System - Therapeutic Endoscopy
• Symptoms and Manifestations - Abdominal Pain
• Symptoms and Manifestations
• Symptoms and Manifestations - Heartburn
• Symptoms and Manifestations - Nausea and Vomiting