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

Thomas Vincent Holohan, MD

Individual provider Internal Medicine Physician · NPI 1235311663

Thomas Vincent Holohan, MD is an Internal Medicine Physician in Rockville, Maryland. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2007
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

15015 Rosecroft Rd
Rockville, MD 20853-1860
Phone: (301) 929-3353
Fax: (301) 929-3354
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 D0022282 (MD)
Medical Oncology Physician Taxonomy 207RX0202X · Licence D0022282 (MD)

Record details

NPI number1235311663
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 27, 2007
Last updated in NPPESNovember 27, 2007

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