NEWTON WELLESLEY PRIMARY CARE P C
NPI 1003911579
Internal Medicine in Wellesley, MA
About Newton Wellesley Primary Care P C NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NEWTON WELLESLEY PRIMARY CARE P C (NPI 1003911579) is a healthcare organization registered as an internal medicine in Wellesley, Massachusetts and active in the NPI registry since September 2006. The organization holds 2 active CLIA laboratory certificates and lists William B Holgerson, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Newton Wellesley Primary Care P C is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
7Medicare enrollment records show 7 clinicians reassign Medicare billing to Newton Wellesley Primary Care P C, which bills Medicare for the services they deliver. Of these, 7 practice at this address. They are listed nearest first.
Clinicians, nearest first (7)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA 2
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 22D2108317
Newton Wellesley Primary Care PC · Wellesley, MACertificate of Waiver 22D2028811
Newton Wellesley Primary Care · Wellesley, MAFrequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Newton Wellesley Primary Care P C's NPI number?
The NPI number for Newton Wellesley Primary Care P C is 1003911579. It was assigned to this organization in the NPPES registry on September 13, 2006.
Where is Newton Wellesley Primary Care P C located?
Newton Wellesley Primary Care P C is located at 40 Walnut St, Wellesley, MA 02481. The listed phone number is (781) 943-3000.
What is Newton Wellesley Primary Care P C's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Newton Wellesley Primary Care P C enrolled in Medicare?
Yes. Newton Wellesley Primary Care P C is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Newton Wellesley Primary Care P C?
According to the CMS Revalidation Reassignment List (October 2026 release), 7 clinicians, all in Internal Medicine, reassign their Medicare billing to Newton Wellesley Primary Care P C. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 7 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Newton Wellesley Primary Care P C hold CLIA laboratory certificates?
Yes. 2 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.
What insurance does Newton Wellesley Primary Care P C accept?
Health plans from Anthem Blue Cross and Blue Shield list Newton Wellesley Primary Care P C as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Newton Wellesley Primary Care P C was last updated on March 9, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Newton Wellesley Primary Care P C · NPI 1003911579
Internal Medicine organization in Wellesley, Massachusetts. Organization record, active in the CMS NPPES registry since September 13, 2006.
## Identity
- **NPI:** 1003911579 (Entity type: Organization)
- **Enumerated:** September 13, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** William Holgerson, PRESIDENT
## Practice location
- **Address:** 40 WALNUT ST, Wellesley, MA 02481-2173
- **Phone:** (781) 943-3000 · **Fax:** (781) 943-3001
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 7 clinicians (Internal Medicine) reassign Medicare billing to this organization (form CMS-855R); 7 practice at this address · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 9, 2017
- **Other identifiers:** Other M16342 (MA); Medicare PIN M20124 (MA); Other 9777644 (MA); and 1 more
- **CLIA laboratory certificates:** 2 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1003911579) · Data from the CMS NPPES public registry.