ENDOCRINE ASSOCIATES OF WESTERN MASS, P.C.
NPI 1396766424
Internal Medicine - Endocrinology, Diabetes & Metabolism in Springfield, MA
About Endocrine Associates Of Western Mass, P.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ENDOCRINE ASSOCIATES OF WESTERN MASS, P.C. (NPI 1396766424) is a healthcare organization registered as an endocrinology, diabetes & metabolism in Springfield, Massachusetts and active in the NPI registry since July 2006. The organization holds a CLIA Waiver certificate valid through March 9, 2027 and lists Barry Z Izenstein, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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)
Endocrine Associates Of Western Mass, P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
4Medicare enrollment records show 4 clinicians reassign Medicare billing to Endocrine Associates Of Western Mass, P.C., which bills Medicare for the services they deliver. Of these, 4 practice within 10 miles. They are listed nearest first.
Clinicians, nearest first (4)
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
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 22D0709439
Endocrine Associates Of Western Mass PC · Springfield, 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 Endocrine Associates Of Western Mass, P.C.'s NPI number?
The NPI number for Endocrine Associates Of Western Mass, P.C. is 1396766424. It was assigned to this organization in the NPPES registry on July 22, 2006.
Where is Endocrine Associates Of Western Mass, P.C. located?
Endocrine Associates Of Western Mass, P.C. is located at 2 Medical Center Dr Ste. 210, Springfield, MA 01107. The listed phone number is (413) 734-4661.
What is Endocrine Associates Of Western Mass, P.C.'s specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Endocrine Associates Of Western Mass, P.C. enrolled in Medicare?
Yes. Endocrine Associates Of Western Mass, P.C. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Endocrine Associates Of Western Mass, P.C.?
According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians in 2 Medicare specialties reassign their Medicare billing to Endocrine Associates Of Western Mass, 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. The largest specialties are Endocrinology (3) and Nurse Practitioner (1). Of these, 4 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Endocrine Associates Of Western Mass, P.C. hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 22D0709439) is associated with this NPI, valid through March 9, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Endocrine Associates Of Western Mass, P.C. was last updated on February 20, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Endocrine Associates Of Western Mass, P.c. · NPI 1396766424
Endocrinology, Diabetes & Metabolism organization in Springfield, Massachusetts. Organization record, active in the CMS NPPES registry since July 22, 2006.
## Identity
- **NPI:** 1396766424 (Entity type: Organization)
- **Enumerated:** July 22, 2006
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **Organization subpart:** No
- **Authorized official:** Barry Izenstein, PRESIDENT
## Practice location
- **Address:** 2 MEDICAL CENTER DR, STE. 210, Springfield, MA 01107-1270
- **Phone:** (413) 734-4661 · **Fax:** (413) 737-1930
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 4 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Endocrinology (3), Nurse Practitioner (1); 4 practice within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 20, 2009
- **Other identifiers:** Medicare PIN M09818
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1396766424) · Data from the CMS NPPES public registry.