HARVARD VANGUARD MEDICAL ASSOCIATES
NPI 1174746275
Internal Medicine in Chelmsford, MA
About Harvard Vanguard Medical Associates NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HARVARD VANGUARD MEDICAL ASSOCIATES (NPI 1174746275) is a healthcare organization registered as an internal medicine in Chelmsford, Massachusetts and active in the NPI registry since April 2007. The organization lists Steve Strongwater, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 15
Other Names 1
Other Identifiers 3
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Harvard Vanguard Medical Associates is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
1,316Medicare enrollment records show 1,316 clinicians reassign Medicare billing to Harvard Vanguard Medical Associates, which bills Medicare for the services they deliver. Of these, 39 practice at this address and 96 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 51
Nearest to this location (20)
See all 1,316Chelmsford, MA 01824
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently 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 Atrius Health, Inc.'s NPI number?
The NPI number for Atrius Health, Inc. is 1174746275. It was assigned to this organization in the NPPES registry on April 10, 2007. The provider is doing business as Harvard Vanguard Medical Associates.
Where is Atrius Health, Inc. located?
Atrius Health, Inc. is located at 228 Billerica Rd, Chelmsford, MA 01824. The listed phone number is (978) 250-6000.
What is Atrius Health, Inc.'s specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Atrius Health, Inc. enrolled in Medicare?
Yes. Atrius Health, Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Atrius Health, Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 1,316 clinicians in 51 Medicare specialties reassign their Medicare billing to Atrius Health, Inc.. 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. The largest specialties are Nurse Practitioner (387), Internal Medicine (189) and Pediatric Medicine (123). Of these, 39 practice at this address and 96 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Atrius Health, Inc. was last updated on June 20, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Harvard Vanguard Medical Associates · NPI 1174746275
Internal Medicine organization in Chelmsford, Massachusetts. Organization record, active in the CMS NPPES registry since April 10, 2007.
## Identity
- **NPI:** 1174746275 (Entity type: Organization)
- **Enumerated:** April 10, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Legal business name:** Atrius Health, Inc.
- **Organization subpart:** No
- **Authorized official:** Steve Strongwater, PRESIDENT
## Practice location
- **Address:** 228 BILLERICA RD, Chelmsford, MA 01824-3604
- **Phone:** (978) 250-6000 · **Fax:** (978) 244-6610
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1,316 clinicians in 51 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (387), Internal Medicine (189), Pediatric Medicine (123); 39 practice at this address and 96 within 10 miles; [full list](https://npiprofile.com/npi/1174746275/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 20, 2022
- **Other identifiers:** Other 0014258 (MA); Other 42736 (MA); Other M16858 (MA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1174746275) · Data from the CMS NPPES public registry.