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

Dr. William J. Cassidy, MD

Individual provider Internal Medicine Physician · NPI 1114959384

Dr. William J. Cassidy, MD is an Internal Medicine Physician in Annapolis, Maryland. Licensed in Maryland. Registered with an NPI since 2006.

Licensed in
MD
In the registry since
2006
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

820 Bestgate Rd Ste 2A
Annapolis, MD 21401
Phone: (410) 224-2116
Fax: (410) 224-2118
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 D0019120 (MD)

Record details

NPI number1114959384
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 7, 2006
Last updated in NPPESApril 12, 2012
Mailing address820 Bestgate Road, Suite 2b, Annapolis, MD 21401

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