Sonia Chalfin, NP
NPI 1629271457 · Pediatric Nurse Practitioner · Boston, MA
Enrolled with Medicare as Order and Referring Only - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sonia Chalfin, NP is a Pediatric Nurse Practitioner provider in Boston, MA (NPI 1629271457).
Provider details
- NPI number
- 1629271457
- Entity type
- Individual
- Primary specialty
- Pediatric Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 252157 (MA)
Specialties & taxonomies
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
19 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
- 2007-06-08
- Last updated
- 2007-07-08
Frequently asked questions
- What is Sonia Chalfin's NPI number?
- Sonia Chalfin's National Provider Identifier (NPI) is 1629271457, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sonia Chalfin's specialty?
- Sonia Chalfin is listed in the NPPES registry with a primary specialty of Pediatric Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sonia Chalfin located?
- Sonia Chalfin's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Sonia Chalfin's phone number?
- The practice phone number listed in the NPPES registry for Sonia Chalfin is (617) 355-7718.
- Does Sonia Chalfin accept Medicare?
- Sonia Chalfin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sonia Chalfin's NPI active?
- Yes — Sonia Chalfin's NPI (1629271457) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.