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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM GEORGE NELSON M.D.
NPI 1891748604
Internal Medicine - Medical Oncology in Baltimore, MD

Active since May 19, 2006
600 N WOLFE ST, BALTIMORE, MD 21287(410) 955-8964 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About William George Nelson M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM GEORGE NELSON M.D. (NPI 1891748604) is an individual medical oncology provider in Baltimore, Maryland, licensed in Maryland (D39683) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1891748604
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameWILLIAM GEORGE NELSONCredential: M.D.
Location Address600 N WOLFE STBaltimore, MD 21287-0005
Mailing AddressPo Box 64474Baltimore, MD 21264-4474 · (410) 933-7400
Phone(410) 955-8964
Sole ProprietorNo
Enumeration DateMay 19, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1891748604 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License✔ Licensed in MD · D39683
Definition
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.
600 N WOLFE ST, Baltimore, MD 21287
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PAMELA KIMZEY DONOHUE SCD, PA-C
Physician Assistant (Medical)
600 N WOLFE ST, NELSON 2-133
BALTIMORE, MD 21287
Baltimore City (410) 955-5232
MR. CHRISTOPHER DAVID SCHRIEBER M.S., PA-C
Physician Assistant
600 N WOLFE ST, MARBURG B-186
BALTIMORE, MD 21287
Baltimore City (410) 955-8708
DR. SABRINA CHRISTINE SOPHA M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
600 N WOLFE ST
BALTIMORE, MD 21287
Baltimore City (410) 955-3580
SANDRA KING D.H.
Dental Hygienist
600 N WOLFE ST, BLALOCK 266
BALTIMORE, MD 21287
Baltimore City (410) 955-6662
THERESA J RUDDY C.P.N.P., CRNP
Nurse Practitioner (Acute Care)
600 N WOLFE ST
BALTIMORE, MD 21287
Baltimore City (410) 955-5260
DR. SUMAN PAUL M.B.B.S, PHD
Internal Medicine (Medical Oncology)
600 N WOLFE ST
BALTIMORE, MD 21287
Baltimore City (410) 955-5000
MS. SARAH CATHERINE COLLICA
Psychiatry & Neurology (Psychiatry)
600 N WOLFE ST
BALTIMORE, MD 21287
Baltimore City (443) 287-4701
JEFF S EHRESMAN
Student in an Organized Health Care Education/Training Program
600 N WOLFE ST
BALTIMORE, MD 21287
Baltimore City (410) 955-5000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Nelson's NPI number?

The NPI number for William Nelson is 1891748604. It was assigned to this individual provider in the NPPES registry on May 19, 2006.

Where is William Nelson located?

William Nelson practices at 600 N Wolfe St, Baltimore, MD 21287. The listed phone number is (410) 955-8964.

What is William Nelson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

When was this NPI record last updated?

The NPPES record for William Nelson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.