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

Sharon A Siwiec, NP

Individual provider Nurse Practitioner · NPI 1548226731

Sharon A Siwiec, NP is a Nurse Practitioner in Boston, Massachusetts. Qualified in 1980, 46 years ago. Practices with Atrius Health Inc, a 1,205-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
46
Licensed in
MA
In the registry since
2006
Specialties on file
2
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

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Practice location Address checks out

133 Brookline Ave
Boston, MA 02215-3904
Phone: (617) 421-1000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Adult Health Nurse Practitioner (primary) Taxonomy 363LA2200X · Licence 130321 (MA)
Nurse Practitioner Taxonomy 363L00000X · Licence 130321 (MA)

Record details

NPI number1548226731
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorNo
NPI enumeratedApril 25, 2006
Last updated in NPPESMarch 7, 2021
Certification dateMarch 7, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 1980 (46 years in practice)
Group practice Atrius Health Inc — 1205 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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