HARVARD VANGUARD MEDICAL ASSOCIATES
NPI 1043366537
Internal Medicine in Watertown, 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 1043366537) is a healthcare organization registered as an internal medicine in Watertown, Massachusetts and active in the NPI registry since January 2007. The organization holds 2 active CLIA laboratory certificates and lists Steve Strongwater, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 12
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, 4 practice at this address and 711 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 1,316Source: 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 Accreditation 22D0078405
Atrius Health Watertown · Watertown, MACertificate of Compliance 22D2011115
Atrius Health Watertown Mohs · Watertown, 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 Atrius Health, Inc.'s NPI number?
The NPI number for Atrius Health, Inc. is 1043366537. It was assigned to this organization in the NPPES registry on January 26, 2007. The provider is doing business as Harvard Vanguard Medical Associates.
Where is Atrius Health, Inc. located?
Atrius Health, Inc. is located at 485 Arsenal St, Watertown, MA 02472. The listed phone number is (617) 972-5100.
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, 4 practice at this address and 711 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Atrius Health, Inc. 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.
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 1043366537
Internal Medicine organization in Watertown, Massachusetts. Organization record, active in the CMS NPPES registry since January 26, 2007.
## Identity
- **NPI:** 1043366537 (Entity type: Organization)
- **Enumerated:** January 26, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Legal business name:** Atrius Health, Inc.
- **Organization subpart:** No
- **Authorized official:** Steve Strongwater, PRESIDENT
## Practice location
- **Address:** 485 ARSENAL ST, Watertown, MA 02472-5091
- **Phone:** (617) 972-5100 · **Fax:** (617) 972-5439
## 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); 4 practice at this address and 711 within 10 miles; [full list](https://npiprofile.com/npi/1043366537/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 20, 2022
- **Other identifiers:** Other 42741 (MA); Other 0014266 (MA); Other M16857 (MA)
- **CLIA laboratory certificates:** 2 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1043366537) · Data from the CMS NPPES public registry.