Sharon Siwiec, NP
NPI 1548226731 · Adult Health Nurse Practitioner · Boston, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sharon Siwiec, NP is a Adult Health Nurse Practitioner provider in Boston, MA (NPI 1548226731).
Provider details
- NPI number
- 1548226731
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 130321 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-25
- Last updated
- 2021-03-07
- Certified
- 2021-03-07
Frequently asked questions
- What is Sharon Siwiec's NPI number?
- Sharon Siwiec's National Provider Identifier (NPI) is 1548226731, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sharon Siwiec's specialty?
- Sharon Siwiec is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sharon Siwiec located?
- Sharon Siwiec's practice location on file with NPPES is 133 Brookline Ave, Boston, MA 02215-3904.
- What is Sharon Siwiec's phone number?
- The practice phone number listed in the NPPES registry for Sharon Siwiec is (617) 421-1000.
- Does Sharon Siwiec accept Medicare?
- Sharon Siwiec is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sharon Siwiec's NPI active?
- Yes — Sharon Siwiec's NPI (1548226731) is active in the NPPES registry as of the last update on 2021-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.