Individual provider · Type 1 NPI

Joshua M. Allen, MD

Medical Oncology Physician · Fairfax, VA

NPI number 1942628458 Active

Practice location

3580 Joseph Siewick Dr Ste 403
Fairfax, VA 22033-1764

Call (703) 391-4395 Map

Fax (703) 391-4394

Mailing address

PO Box 37174
Baltimore, MD 21297-3174

Other practice locations

  • 8081 Innovation Park Dr, Fairfax, VA 22031-4867 · (571) 472-4724

Specialties and licenses

TaxonomyCodeLicense
Hematology (Internal Medicine) Physician 207RH0000X0101268640 (VA)
Medical Oncology Physician Primary 207RX0202X0101268640 (VA)
Internal Medicine Physician 207R00000X0101268640 (VA)

Medical Oncology Physician: An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.

9 other providers at this address

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About NPI 1942628458

Joshua M. Allen, MD's National Provider Identifier is 1942628458, issued on Apr 1, 2014. The primary taxonomy on file is Medical Oncology Physician (207RX0202X), and the practice location is in Fairfax, VA. The record was last updated on Apr 22, 2026.