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James Xunhai Xu, M.D.

Headshot of James Xunhai Xu

Languages: English, Mandarin


Bladder Cancer, Hematology, Kidney Cancer, Lung Cancer, Oncology, Prostate Cancer more


Potomac Oncology and Hematology

6000 Executive Boulevard
Suite 501
Rockville, MD 20852 map
Phone: 240-618-0275 | Fax: 240-470-1518


Dr. James Xu received a bachelor of science in chemical engineering with a minor in mathematics from Brigham Young University and his medical degree from University of Minnesota. He completed his internal medicine residency at the Yale-New Haven Hospital of Yale University in New Haven, CT, and his hematology and medical oncology fellowship at the New York-Presbyterian Hospital of Columbia University in New York City.

Because of his unique background in engineering and medicine, Dr. Xu was the recipient of the American Society of Clinical Oncology-Conquer Cancer Foundation Young Investigator Award in 2011 and Merit Award in 2012.

Dr. Xu is a strong advocate of precision medicine and he is the first person to have proposed and preliminarily confirmed the feasibility of using deep sequencing technology to detect genetic mutation in rare cell samples such as circulating tumor cells from cancer patients’ peripheral blood. He has published in peer-reviewed journals in lung, breast, and pancreatic cancers. Dr. Xu is board certified in internal medicine, hematology, and medical oncology. more

Departments / Divisions

  • Medicine at Suburban Hospital



  • MD; University of Minnesota Medical School (2006)


  • Internal Medicine; Yale-New Haven Hospital (2009)


  • Hematology and Oncology; New York-Presbyterian/Columbia University Irving Medical Center (2012)

Board Certifications

  • American Board of Internal Medicine (Hematology) (2012)
  • American Board of Internal Medicine (Internal Medicine) (2011)
  • American Board of Internal Medicine (Medical Oncology) (2012)

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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