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

Dr. Leszek Karowiec, MD

Individual provider Internal Medicine Physician · NPI 1265519672

Dr. Leszek Karowiec, MD is an Internal Medicine Physician in Gaithersburg, 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.

See every abbreviation used in this directory →

Practice location Address checks out

501 N Frederick Ave
Gaithersburg, MD 20877-2598
Phone: (301) 258-7265
Fax: (301) 258-7294
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 D35859 (MD)

Record details

NPI number1265519672
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 1, 2006
Last updated in NPPESJuly 8, 2007

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