Penn Medicine Provider
Pathology and Laboratory Medicine
Timothy H. Chao, MD, PhD
Accepting new patients
Sees patients age 18 and up
Penn Pathology and Laboratory Medicine HUP
Call 800-789-7366

About me

  • Assistant Professor of Clinical Pathology and Laboratory Medicine

Education and training

  • Medical School: University of Pennsylvania School of Medicine
  • Residency: Thomas Jefferson University Hospital
  • Fellowship: Hospital of the University of Pennsylvania

Insurance accepted

My Locations

Learn about location

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. Chao is a Penn Medicine physician.

Qualifications and experience

My research

Meredith L, Chao T, Nevler A, Basu Mallick A, Singla RK, McCue PA, Bowne WB, Jiang W. A rare metastatic mesenteric malignant PEComa with TSC2 mutation treated with palliative surgical resection and nab-sirolimus: a case report , Diagnostic Pathology, 18(1): 2023,45

M.D. Gonzalez, T. Chao, M.A. Pettengill Modern Blood Culture: Management Decisions and Method Options , Clinics in Laboratory Medicine, 40(4): 2020,379-392

M.E. Smith, S.J. Farahani, T. Chao, M. Palmer, A. Arriola, P. Lal PD-L1 positivity associated with presence of tertiary lymphoid structures and high-stage disease in upper tract urothelail carcinoma , American Journal of Clinical Pathology, 154(6): 2020,802-810

K. Hafazalla, D.Y. Ye, T. Chao, M. Curtis, C.J. Farrell Subependymal giant cell astrocytoma without clinically or genetically identifiable tuberous sclerosis complex: a case report. , Case Reports and Series in Surgery, 1(2): 2020,1-4

T. Chao, D. Fortuna, R. Kean, D. Hooper, M. Nagurney, M. Curtis. CSF Cytokine Profiles Help Discriminate CNS Tumors, Lymphomas, Autoimmune Diseases, and Infections , Laboratory Investigation, 100(Suppl 1): 2020,1605

J. Li, K.T. Byrne, F. Yan, T. Yamazoe, Z. Chen, T. Baslan, L.P. Richman, J.H. Lin, Y.H. Sun, A.J. Rech, D. Balli, C.A. Hay, Y. Sela, A.J. Merrell, S.M. Liudahl, N. Gordon, R.J. Norgard, S. Yuan, S. Yu, T. Chao, S. Ye, TS.K. Eisinger-Mathason, R.B. Faryabi, J.W. Tobias, S.W. Lowe, L.M. Coussens, E.J. Wherry, R.H. Vonderheide, B.Z. Stanger Tumor cell-intrinsic factors underlie heterogeneity of immune cell infiltration and response to immunotherapy. , Immunity, 49(1): 2018,178-193.e7.

V. Kumar, L. Donthireddy, D. Marvel, T. Condamine, F. Wang, S. Lavilla-Alonso, A. Hashimoto, P. Vonteddu, R. Behera, M.A. Goins, C. Mulligan, B. Nam, N. Hockstein, F. Denstman, S. Shakamuri, D.W. Speicher, A.T. Weeraratna, T. Chao, R.H. Vonderheide, L.R. Languino, P. Ordentlich, Q. Liu, X. Xu, A. Lo, E. Pure, C. Zhang, A. Loboda, M.A. Sepulveda, L.A. Snyder, D.I. Gabrilovich. Cancer-associated fibroblasts neutralize the anti-tumor effect of CSF1 receptor blockade by inducing PMN-MDSC infiltration of tumors , Cancer Cell, 32(5): 2017,654-668

T. Chao, E.E. Furth, R.H. Vonderheide CXCR2-dependent accumulation of tumor-associated neutrophils regulates T-cell immunity in pancreatic ductal adenocarcinoma , Cancer Immunology Research, 4(11): 2016,968-982

R. Evans, M. Diamond, A. Rech, T. Chao, M. Richardson, J. Lin, D. Bajor, K. Byrne, B. Stanger, J. Riley, N. Markosyan, R. Winograd, R.H.Vonderheide Lack of immunoediting in murine pancreatic cancer reversed with neoantigen , Journal of Clinical Investigation Insight, 1(14): 2016,e88328

H. Katayama, C. Boldt, J.J. Ladd, M.M. Johnson, T. Chao, M. Capello, J. Suo, J. Mao, J.E. Manson, R. Prentice, F. Esteva, H. Wang, M.L. Disis, S. Hanash. An Autoimmune Response Signature Associated with the Development of Triple-Negative Breast Cancer Reflects Disease Pathogenesis , Cancer Research, 75(16): 2015,3246-54