David Unold, M.D.

Health Sciences Clinical Associate Professor

David Unold is not currently accepting new patients. For assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).



Transfusion Medicine

Apheresis and Special Coagulation

Locations and Contact

UC Davis Medical Center

UC Davis Medical Center
2315 Stockton Blvd.
Sacramento, CA 95817

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Additional Numbers

Physician Referrals

800-4-UCDAVIS (800-482-3284)

Philosophy of Care

Dr. Unold believes in providing evidence based and cost effective patient care.

Clinical Interests

Dr. Unold is a clinical pathologist who practices blood banking/transfusion medicine, laboratory coagulation, and apheresis.

Research/Academic Interests

Dr. Unold is director of the blood banking/ transfusion medicine fellowship and is interested in the diagnosis and treatment of bleeding and clotting disorders.


Clinical Pathology

Undergraduate School

B.S., Biomedical Science, Marquette University, Milwaukee WI 2005

Medical School

M.D., Medical College of Wisconsin, Milwaukee WI 2009


Pathology, Baystate Medical Center/Tufts University School of Medicine, Springfield MA 2009-2013


Blood Banking/Transfusion Medicine, Yale-New Haven Hospital, New Haven CT 2013-2014

Ryder A, Snyder E, and Unold D. Transfusion Reactions. Benz E, Berliner N, Schiffman F (eds). Anemia: Pathophysiology, Diagnosis and Management, Cambridge University Press, Cambridge, UK. 2018:4(30):207-216.

Unold D, Tormey CA. Clinical Applications of 4-Factor Prothrombin Complex Concentrate: A Practical Pathologist's Perspective. Arch Pathol Lab Med. 2015 Dec;139(12):1568-75. doi:10.5858/arpa.2014-0366-RS. PMID:26619030.

Unold D. Caring for Patients Who Refuse Transfusion. BloodSmart News. 2015 Jul.

Unold D. Hemovigilance and Blood Safety. BloodSmart News. 2015 Jan.

Andrzejewski C, Cloutier D, Unold D, and Friedberg RC. Improving patient safety in transfusion medicine:  contemporary challenges and the roles for bedside and laboratory biovigilance in addressing them. International J Clin Transfusion Med. 2014 Jul 10;2:45-57. doi:10.2147/IJCTM.S40024.

Paidy S, Unold D, Catanzano TM. AIRP best cases in radiologic-pathologic correlation: localized amyloidosis of the renal pelvis. Radiographics. 2012 Nov-Dec;32(7):2025-30. doi:10.1148/rg.327115157. PMID:23150855.

Canoy JM, Mitchell GS, Unold D, Miller V. A radiologic review of common breast disorders in pregnancy and the perinatal period. Semin Ultrasound CT MR. 2012 Feb;33(1):78-85. doi:10.1053/j.sult.2011.10.002. PMID:22264905.

Penn HJ, Langman LJ, Unold D, Shields J, Nichols JH. Detection of synthetic cannabinoids in herbal incense products. Clin Biochem. 2011 Sep;44(13):1163-1165. doi:10.1016/j.clinbiochem.2011.06.078. Epub 2011 Jun 29. PMID:21741374.

Unold D, Nichols JH. Point-of-care Testing: Needs, Opportunity, and Innovation, 3rd edition, by Price CP, St John A, Larry J. Kricka LJ (eds). [Book Review]. Clin Chem. 2010 Dec;56(12):1893-1894. doi:10.1373/clinchem.2010.154872.

Barman M, Unold D, Shifley K, Amir E, Hung K, Bos N, Salzman N. Enteric salmonellosis disrupts the microbial ecology of the murine gastrointestinal tract. Infect Immun. 2008 Mar;76(3):907-15. doi:10.1128/IAI.01432-07. Epub 2007 Dec 26. PMID:18160481.