Andrew “Chase” Kleehammer, DO

Department: MD-MED CENTRAL-HOUSESTAFF

Andrew Kleehammer

RESIDENT

Publications/Research

• Kleehammer AC, King W, Creech L, Zuercher H, Pittman K, Miquel-Chambers C, Piranion V, Iakovidis A, Qumseya B. 2025. Staggering Rates of Rapid CYP2C19 Metabolism Among Patients with GERD Referred to Gastroenterology. Distinguished poster and poster tour presentation at Digestive Disease Week. San Diego, CA.
• Kleehammer AC, Giansiracusa M, Olson S, Creech L, Latortue T, Fieber J, Chua T, Forsmark C, Novikov A. 2025. Outcomes of Patients with Indeterminate Biliary Strictures Following Comprehensie Endoscopic Workup. Oral presentation at Digestive Disease Week. San Diego, CA.
• Latortue T, Kleehammer AC, Zuercher H, Pittman K, Saker Y, Dixit D, Neal D, Curtis, Beduschi, Zarrinpar A, Kamel A. 2025. PSOAS-MELD: A New Model to Better Precict Outcomes in Liver Transplant Patients. Oral presentation at Digestive Disease Week. San Diego, CA.
• Giansiracusa M, Kleehammer AC, Creech L, Latortue T, Olson S, Novikov A. 2025. Timing of FCSEMS Exchange in Distal Malignant Bile Duct Obstruction. Poster presentation at Digestive Disease Week. San Diego, CA.
• Olson S, King W, Kleehammer AC, Pittman K, Zuercher H, Goddard A, Qumseya B. 2025. Suboptimal Rates of Documentation of Gastroesophageal Junction Findings During Index Endoscopy for Patients with GERD. Oral presentation at Digestive Disease Week. San Diego, CA.
• Jennifer Fieber, Christy Shao, Rushi Shaw, Andrew Kleehammer, Matthew Giansiracusa, Bishal Paudel, Aleksey Novikov. 2025. Earlier Time of Index ERCP Associated with Biliary Stricture Resolution in Orthotropic Liver Transplant. Oral presentation at Academic Surgical Congress. Las Vegas, NV.
• Kleehammer, AC, Et al. 2024. Management of GJ Obstruction Using Coupled Fully Covered Self-Expanding Metal Stents. Video and Poster Presentation at American College of Gastroenterolgy Annual Meeting. Philadelphia, PA.
• Kleehammer AC, Et al. 2024. REM Sleep Behavior Disorder Masquerading as Hepatic Encephalopathy in a Decompensated Cirrhotic Trialing Topiramate/Phentermine for Weight Loss. Poster Presentation at American College of Gastroenterolgy Annual Meeting. Philadelphia, PA.
• Dixit D, Kleehammer AC, Latortue T, Zuercher H, Pittman K, Kamel A. 2024. MELD-Psoas: A New Composite Predicitive Score for Post-Liver Transplant Outcomes. Poster Presentation at American College of Gastroenterolgy Annual Meeting. Philadelphia, PA.
• Paudel B, Kleehammer AC, Fieber J, Nassour I, Cheema H, Novikov A. 2024. One of These Things Is Not Like the Other: Primary Bile Duct-Associate Neuroendocrine Tumor. Poster Presentation at American College of Gastroenterolgy Annual Meeting. Philadelphia, PA.
• Latorture T, Kleehammer AC, Qumesya B. 2024. A Case of Abdominal Wall Pain Misdiagnosed as Pancreatitis. Poster Presentation at American College of Gastroenterolgy Annual Meeting. Philadelphia, PA.
• Paudel B, Smith J, Giansiracusa M, Agarwal A, Kleehammer AC, Fieber J, Zori A, Forsmark C, Novikov A. 2024. Optimal Endoscopic Management of Orthotopic Liver Transplant Anastomotic Strictures. Poster Presentation at American College of Gastroenterolgy Annual Meeting. Philadelphia, PA.
• Smith J, Paudel B, Giansiracusa M, Agarwal A, Kleehammer AC, Zori A, Forsmark C, Novikov A. 2024. Optimal Endoscopic Management of Bile Leaks After Orthotopic Liver Transplantation. Poster Presentation at American College of Gastroenterolgy Annual Meeting. Philadelphia, PA.
• Akash Mathavan, Akshay Mathavan, Urszula Krekora, Andrew C. Kleehammer, Christina M. Eagan, Marc S. Zumberg, Jeb Justice, Andreas G. Zori, Ali Ataya. Ischemic Phenotypes in Hereditary Hemorrhagic Telangiectasia (HHT) Treated with Bevacizumab. 2024. 15th HHT International Science Conference. Mandelieu-La Napoule, France.
• Mathavan A, Krekora U, Kleehammer AC, Mathavan A. Passenger lymphocyte syndrome following minor ABO-mismatched liver transplantation. BMJ Case Rep. 2024 Mar 7;17(3):e259259. doi: 10.1136/bcr-2023-259259. PMID: 38453222; PMCID: PMC10921429.
• Kleehammer AC, Sheth MJ. 2022. A Novel Finding of Isolated Parachute Mitral Valve and Left Ventricular Non-Compaction on Echocardiography Presenting as Cardiomyopathy in an Adult Patient. Poster presentation at the 6th Annual LMU Research Day. Harrogate, TN.
• Kleehammer AC, Sheth MJ. 2022. A Novel Finding of Isolated Parachute Mitral Valve and Left Ventricular Non-Compaction on Echocardiography Presenting as Cardiomyopathy in and Adult Patient. Poster Presentation at the 124th Annual Convention of the Tennessee Osteopathic Medicine Association. Knoxville, TN.
• Kleehammer AC, Davidson KB, Thompson BJ. 2022 How Many Branches Does the Pectoral Nerve Really Have? Rethinking the Pectoral Nerve Nomenclature. Published abstract from the 38th Annual Meeting of the American Association of Clinical Anatomists. Clinical Anatomy.
• Kleehammer AC, Davidson KB, Thompson BJ. 2021. How Many Branches Does the Pectoral Nerve Really Have? Rethinking the Pectoral Nerve Nomenclature. Virtual poster presentation at the 2021 Annual Clinical Meeting of the American Association of Clinical Anatomists.
• Kleehammer AC, Davidson KB, Thompson BJ. 2021. A Third Pectoral Nerve and Clinical Implications. Virtual podium presentation at the 2021 American College of Osteopathic Surgeons – Medical Student Section Spring Meeting.
• Kleehammer AC, Davidson KB, Thompson BJ. 2021. Revisiting the Pectoral Nerves – A Third Nerve and New Approach to Nomenclature. Virtual oral presentation at the 5th annual LMU Research Day. Harrogate, TN.
• Kleehammer AC, Davidson KB, Thompson BJ. 2021. Pectoral Nerves – A Third Nerve and Clinical Implications. Virtual poster presentation at the 123rd Annual Convention of the Tennessee Osteopathic Medical Association. Nashville, TN.
• Kleehammer AC, Davidson KB, Thompson BJ. 2021. Pectoral Nerves Research – A Work in Progress. Virtual seminar presentation at the LMU-DCOM Graduate Seminar Series. Knoxville, TN.