Nathan J. Klingensmith, MD

Trauma Surgery, General Surgery
Accepting new patients
Sees patients age 18 and up
Penn Traumatology, Surgical Critical Care and Emergency Surgery University City
View 2 additional locations
Make an appointmentCall 800-789-7366
Headshot of Nathan J. Klingensmith, MD
Penn Medicine Provider

About me

  • Assistant Professor of Surgery
  • Director of Education, Division of Traumatology, Surgical Critical Care, and Emergency Surgery Service
  • Assistant Professor of Surgery at the Hospital of the University of Pennsylvania

My education and training

  • Medical School: West Virginia University School of Medicine
  • Residency: Emory University Hospital
  • Fellowship: Emory University Hospital

Spoken languages

English
English

Insurance accepted

Please contact the practice and/or the member services department of your insurance company for specific details before receiving services. Providers may participate in some, but not all, products offered by a health plan; providers may also accept plans at some practice locations but not others.

Locations

Penn Medicine hospital privileges

  • Hospital of the University of Pennsylvania: Has privileges to treat patients in the hospital.
  • Pennsylvania Hospital: Has privileges to treat patients in the hospital.
  • Penn Presbyterian Medical Center: Has privileges to treat patients in the hospital.
Dr. Klingensmith is a Penn Medicine physician.

Qualifications and experience

Treatments and Conditions

Research

Publications

Lee MJ, Kaplan LJ, Mohseni S, Cimino M, Kurihara H, Martinez-Casas I, Bass GA; SnapSBO Collaborators. Impact of surgery and complications on GI recovery after SBO: Insights from the SnapSBO cohort , Colorectal Dis: 2026

Klingensmith, NJ Gut Physiology and the Microbiome , Principles of Adult Surgical Critical Care: 2026

Cimino MM, Bass GA, Kurihara H, Bellio G, Porta M, Cayre L, Mohseni S, Lee MJ, Kaplan LJ, Martinez-Casas I; ESTES SnapSBO Group. Management and outcome variability in hernia-related small bowel obstruction: insights from the SnapSBO study , BJS Open, 9: 2025,zraf127

Kaplan LJ, Martinez-Casas I, Mohseni S, Cimino M, Kurihara H, Lee MJ, Bass GA; SnapSBO Collaborators. Small bowel obstruction outcomes according to compliance with the World Society of Emergency Surgery Bologna guidelines , Br J Surg, 112: 2025,znaf080

Bass GA, Kaplan LJ, Gaarder C, Coimbra R, Klingensmith NJ, Kurihara H, Zago M, Cioffi SPB, Mohseni S, Sugrue M, Tolonen M, Valcarcel CR, Tilsed J, Hildebrand F, Marzi I Publisher Correction: European Society for Trauma and Emergency Surgery member-identified research priorities in emergency surgery: A roadmap for future clinical research opportunities , European Journal of Trauma & Emergency Surgery: 2024 (Epub)

Lam LKM, Klingensmith NJ, Sayegh L, Oatman E, Jose JS, Cosgriff CV, Eckart KA, McGinnis J, Ranjan P, Lanza M, Yehya N, Meyer NJ, Dickson RP, Mangalmurti NS. Red blood cells capture and deliver bacterial DNA to drive host responses during polymicrobial sepsis , J Clin Invest, 135: 2024,e182127

Metthew Lam LK, Oatman E, Eckart KA, Klingensmith NJ, Flowers E, Sayegh L, Yuen J, Clements RL, Meyer NJ, Jurado KA, Vaughan AE, Eisenbarth SC, Mangalmurti NS Human red blood cells express the RNA sensor TLR7 , Science Reports, 14(1): 2024,15789

Oatman E, Klingensmith N, Lam M, Eckart K, Meyer NJ, Mangalmurti NS Human red blood cells express toll-like receptor 7 and bind single stranded RNA , American Journal of Respiratory & Critical Care Medicine, 209: 2024

Bass GA, Kaplan LJ, Gaarder C, Coimbra R, Klingensmith NJ, Kurihara H, Zago M, Cioffi SPB, Mohseni S, Sugrue M, Tolonen M, Valcarcel CR, Tilsed J, Hildebrand F, Marzi I European Society for Trauma and Emergency Surgery member-identified research priorities in emergency surgery: A roadmap for future clinical research opportunities , European Journal of Trauma & Emergency Surgery, 50(2): 2024,367-382

Paterson CW, Fay KT, Chen CW, Klingensmith NJ, Gutierrez MB, Liang Z, Coopersmith CM, Ford ML CTLA-4 checkpoint inhibition improves sepsis survival in alcohol-exposed mice , Immunohorizons, 8(1): 2024,74-88

View all publications