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

Dr. Stephen Merrill Hewitt, MD, PHD

Individual provider Anatomic Pathology Physician · NPI 1912295908

Dr. Stephen Merrill Hewitt, MD, PHD is an Anatomic Pathology Physician in Potomac, Maryland. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2011
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

9401 Holbrook Ln
Potomac, MD 20854-3931
Phone: (301) 299-2072
Show map & directions

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

Specialties & licences

Anatomic Pathology Physician (primary) Taxonomy 207ZP0101X · Licence D0052887 (MD)

Record details

NPI number1912295908
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorYes
NPI enumeratedJuly 12, 2011
Last updated in NPPESJuly 12, 2011

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