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

Peter W. Siersma, MD

Individual provider Internal Medicine Physician · NPI 1730148149

Peter W. Siersma, MD is an Internal Medicine Physician in Williamsburg, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2006.

Licensed in
MA
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

14 Williams St
Williamsburg, MA 01096-9427
Phone: (413) 268-3616
Fax: (413) 268-0337
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 79023 (MA)

Record details

NPI number1730148149
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 23, 2006
Last updated in NPPESOctober 7, 2008
Mailing address14 Williams St, Po Box 765, Williamsburg, MA 01096-9427

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