Sharon A. Siwiec, NP
Adult Health Nurse Practitioner · Boston, MA
Sharon A. Siwiec, NP is an adult health nurse practitioner with a practice address in Boston, Massachusetts, and NPI 1548226731, issued on Apr 25, 2006. Check the license (Massachusetts 130321, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sharon A. Siwiec
- Credential
- NP
- Primary taxonomy
- Adult Health Nurse Practitioner 363LA2200X
- License number
- 130321 MA
Self-reported in NPPES; status is on the state search - Practice location
- 133 Brookline Ave, Boston, MA 02215
- Phone
- (617) 421-1000
- Enumerated
- Apr 25, 2006
- Record last updated
- Mar 7, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 0372510 MA
- Medicare enrollment
- Enrolled (PECOS I20050629000368); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest adult health nurse practitioner records → All 1,465 in Massachusetts → Look up another NPI →
Also registered at 133 Brookline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Sharon A. Siwiec in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 130321Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average adult health nurse practitioner in 2024
43 Medicare Part D claims for 37 beneficiaries, against an average of 1,280 among the 16,937 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Atrius Health IncNeedham, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sharon A. Siwiec among 1,465 adult health nurse practitioner records in Massachusetts
Sharon A. Siwiec, NP is one of 1,465 adult health nurse practitioner records with a practice address in Massachusetts. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 73% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated1980 · median 2010 among the 634 with a school on file
- Record last updated2021 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2200X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
454 adult health nurse practitioner records list a practice address in Boston
They are 454 of the 41,865 NPPES records with a practice address in Boston, and 1,465 adult health nurse practitioner records in Massachusetts.
All 1,465 in Massachusetts → Every provider in Boston → Adult Health Nurse Practitioner nationwide →
The 8 adult health nurse practitioner records with the nearest ZIP codes
- Diane Dinobile, NPBoston, MA 022151811935745
- Lisa Doherty, APRN, BCBoston, MA 022151497700652
- Lisa Dumouchel, APRNBoston, MA 022151013960699
- M Kaufman, NPBoston, MA 022151174578355
- Leah McKinnon-Howe, APRN, BC, NPBoston, MA 022151790728889
- Kathleen Rourke, RNPBoston, MA 022151548286834
- Virginia Seery, NPBoston, MA 022151316970478
- Serena Skiffington, N.P.Boston, MA 022151447296454
Common questions
What is Sharon A. Siwiec, NP's NPI number?
Sharon A. Siwiec, NP's National Provider Identifier (NPI) is 1548226731, issued on Apr 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sharon A. Siwiec, NP located?
The NPPES record lists a practice address at 133 Brookline Ave, Boston, MA, 02215. Phone: (617) 421-1000. Providers update this record themselves, so call before visiting.
How can I verify Sharon A. Siwiec, NP's license?
NPPES lists Massachusetts license number 130321, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Sharon A. Siwiec, NP prescribe under Medicare Part D?
In 2024, Sharon A. Siwiec, NP had 43 Medicare Part D claims for 37 beneficiaries; the average among adult health nurse practitioner prescribers was 1,280. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.