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
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.
- Aetna Advantra Cares D-SNP
- Aetna Advantra Credit Value
- Aetna Advantra Eagle HMO
- Aetna Advantra Eagle POS
- Aetna Advantra Premier Plus PPO
- Aetna Advantra Value
- Aetna Advantra Value Plus
- Aetna APCN Plus (Multi-Tier)
- Aetna Better Health Kids (CHIP) - DH Only
- Aetna Flexible Five
- Aetna Freedom Core
- Aetna Gold
- Aetna HMO
- Aetna Philly Prime
- Aetna POS
- Aetna PPO APCN
- Aetna Premier
- Aetna Premier Plus
- Aetna Savings Plus
- Aetna Signature Administrators
- Aetna Student Health Plan PPO
- Aetna Upfront Advantage
- First Health HMO
- First Health POS
- First Health PPO
- Meritain - Aramark (Other)
- Meritain - Aramark (Pennsylvania Premier Medical Plan)
- Americhealth Caritas of PA VIP - LGH Only
- Amerihealth Caritas (Transplant patients only)
- Amerihealth Caritas of PA - LGH Only
- Centivo EPO
- Cigna Healthcare EPO
- Cigna Healthcare HMO
- Cigna Healthcare POS
- Cigna Healthcare PPO
- Claim Watcher (Homestead/ INDECs) Open Access
- Clover Health Choice
- Clover Health Choice Value PPO
- Clover Health Classic HMO
- Clover Health Value
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.
Qualifications and experience
- Surgery, Surgical Critical Care
- Surgery, 2020
- American Association for the Surgery of Trauma, National
- American College of Surgeons, National
- Eastern Society for the Surgery of Trauma, National
- Shock Society, National
- Society of Critical Care Medicine, National
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