Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. William Russell Byrne, MD

Individual provider Internal Medicine Physician · NPI 1841356953

Dr. William Russell Byrne, MD is an Internal Medicine Physician in Frederick, Maryland. Licensed in California, Maryland, Pennsylvania and Virginia. Registered with an NPI since 2007.

Licensed in
CA, MD, PA, VA
In the registry since
2007
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

19 W 3rd St
Frederick, MD 21701-5330
Phone: (301) 620-0280
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence D0057818 (MD)
Internal Medicine Physician Taxonomy 207R00000X · Licence 0101040260 (VA)
Internal Medicine Physician Taxonomy 207R00000X · Licence GFE57956 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD428951 (PA)

Record details

NPI number1841356953
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 1, 2007
Last updated in NPPESJuly 8, 2007

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