John Graff, D.O.

John Paul Graff, D.O.





  • Assistant Professor


To see if John Paul Graff is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).

Pathology Building

4400 V St.
Sacramento, CA 95817
Driving Directions

Primary Phone:

Additional Phone Numbers

Physician Referrals: (800) 480-0482 Ext. 32

Philosophy of Care

All patients deserve an accurate and timely diagnosis.  We work hard to facilitate appropriate diagnosis utilizing the most up to date testing modalities including chromosomal analysis and next generation sequencing.  

Clinical Interests

Dr. Graff is interested in Hematopathology encompassing lymphoma, leukemia, and non-neopastic hematologic process. 

Research/Academic Interests

Dr. Graff has interest in machine learning in pathology, focusing first on acute leukemia and flow cytometry, as well as, developing programs and computational models to improve pathology workflows and data collection.


Anatomic Pathology


D.O., Lincoln Memorial University DeBusk College of Osteopathic Medicine, Harrogate TN 2012

B.S., Vanderbilt University School of Engineering, Nashville TN 2007


Anatomic Pathology & Clinical Pathology, UC Irvine Medical Center, Orange CA 2012-2016


Hematopathology, UC Davis Medical Center, Sacramento CA 2016-2017

Board Certifications

American Board of Pathology, Anatomic and Clinical Pathology, 2016

Professional Memberships

American Osteopathic Association

American Society for Clinical Pathology

Association for Pathology Informatics

College of American Pathologists, Fellow

Digital Pathology Association

Vanderbilt Honor Society

Honors and Awards

Fellow teaching award UC Davis, 2017

Chief Resident UC Irvine, 2015

Select Recent Publications

Hematology Outlines Interactive Smartphone Quiz APP contributor. 2017.

“The Nokia Lumia 1020 smartphone as a 41-megapixel photomicroscope" Graff, J. Wu, M. Histopathology, 2014: DOI: 10.1111/his.12355

JoltPath Grossing Software, validated and published at UCIMC. 2013.