Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ENDOCRINE ASSOC OF CT LLC
NPI 1295929230
Internal Medicine - Endocrinology, Diabetes & Metabolism in Hamden, CT

Active since September 04, 2007CLIA 07D0988332 · Waiver
1952 WHITNEY AVE, SUITE 14, HAMDEN, CT 06517(203) 776-4444(203) 776-4441 Get Directions Write a Review

NPPES record last updated: October 8, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Endocrine Assoc Of Ct Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ENDOCRINE ASSOC OF CT LLC (NPI 1295929230) is a healthcare organization registered as an endocrinology, diabetes & metabolism in Hamden, Connecticut and active in the NPI registry since September 2007. The organization holds a CLIA Waiver certificate valid through June 25, 2027 and lists Adam B Mayerson, Partner Member, as its authorized official.

NPPES Registry Identity

NPI1295929230
Entity TypeOrganization
Primary Taxonomy207RE0101X
Legal Business NameENDOCRINE ASSOC OF CT LLC
Location Address1952 WHITNEY AVE, SUITE 14Hamden, CT 06517-1209
Mailing Address1952 Whitney Ave, Suite 14Hamden, CT 06517-1209 · (203) 776-4444 · Fax (203) 776-4441
Fax(203) 776-4441
Organization SubpartNo
Authorized OfficialAdam B MayersonPartner Member · (203) 776-4444
Enumeration DateSeptember 4, 2007
Last NPPES UpdateOctober 8, 2026
NPPES CertifiedOctober 8, 2026
✔ NPI 1295929230 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
1952 WHITNEY AVE, Hamden, CT 06517

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 Assoc Of Ct Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

15

Medicare enrollment records show 15 clinicians reassign Medicare billing to Endocrine Assoc Of Ct LLC, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 11 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 2

Endocrinology10
Nurse Practitioner5

Clinicians, nearest first (15)

Nurse Practitioner
NPI 1750969705
1952 WHITNEY AVE STE 14
Hamden, CT 06517
(203) 776-4444
✔ PECOS✔ Accepts MedicareSame address
Nurse Practitioner
NPI 1770966095
1952 WHITNEY AVE SUITE 14
Hamden, CT 06517
(203) 776-4444
✔ PECOSSame address
Endocrinology
NPI 1093851321
200 ORCHARD ST #207
New Haven, CT 06511
(203) 776-4444
✔ PECOS✔ Accepts Medicare4.7 mi
Endocrinology
NPI 1750355137
200 ORCHARD ST SUITE #207
New Haven, CT 06511
(203) 776-4444
✔ PECOS✔ Accepts Medicare4.7 mi
Endocrinology
NPI 1659417889
200 ORCHARD ST STE 207
New Haven, CT 06511
(203) 776-6644
✔ PECOS✔ Accepts Medicare4.7 mi
Endocrinology
NPI 1457451015
200 ORCHARD ST SUITE #207
New Haven, CT 06511
(203) 776-4444
✔ PECOS✔ Accepts Medicare4.7 mi
Endocrinology
NPI 1477793529
200 ORCHARD ST STE 207
New Haven, CT 06511
(203) 776-4444
✔ PECOS✔ Accepts Medicare4.7 mi
Nurse Practitioner
NPI 1467666347
6 BUSINESS PARK DR STE 304
Branford, CT 06405
(203) 488-5885
✔ PECOS✔ Accepts Medicare8.2 mi
Endocrinology
NPI 1023174745
6 BUSINESS PARK DR SUITE 304
Branford, CT 06405
(203) 488-5885
✔ PECOS8.8 mi
Endocrinology
NPI 1417485830
688 E MAIN ST STE 1A
Branford, CT 06405
(203) 488-5885
✔ PECOS✔ Accepts Medicare9.0 mi
Endocrinology
NPI 1316194517
67 MAPLE AVE
Derby, CT 06418
(203) 732-7328
✔ PECOS✔ Accepts Medicare9.7 mi
Nurse Practitioner
NPI 1619623725
110 COMMERCE DR
Shelton, CT 06484
(203) 926-1897
✔ PECOS13 mi
Nurse Practitioner
NPI 1154913150
1579 STRAITS TPKE
Middlebury, CT 06762
(203) 598-7246
✔ PECOS✔ Accepts Medicare16 mi
Endocrinology
NPI 1144496209
112 QUARRY RD SUITE 250
Trumbull, CT 06611
(203) 371-7048
✔ PECOS✔ Accepts Medicare17 mi
Endocrinology
NPI 1609894534
655 MONTGOMERY ST STE 810
San Francisco, CA 94111
(844) 847-8216
✔ PECOS2,618 mi

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 07D0988332

Endocrine Associates Of Ct · Hamden, CT
Active · expires Jun 25, 2027
CLIA Number07D0988332
Laboratory TypePhysician Office
Certificate Effective DateJune 26, 2025
Certificate Expiration DateJune 25, 2027
Laboratory DirectorAdam B. Mayerson
Laboratory Phone(203) 776-4444
Laboratory LocationEndocrine Associates Of Ct1952 Whitney Ave, Suite - 14, Hamden, CT 06517
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

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 Endocrine Assoc Of Ct LLC's NPI number?

The NPI number for Endocrine Assoc Of Ct LLC is 1295929230. It was assigned to this organization in the NPPES registry on September 4, 2007.

Where is Endocrine Assoc Of Ct LLC located?

Endocrine Assoc Of Ct LLC is located at 1952 Whitney Ave Suite 14, Hamden, CT 06517. The listed phone number is (203) 776-4444.

What is Endocrine Assoc Of Ct LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Endocrine Assoc Of Ct LLC enrolled in Medicare?

Yes. Endocrine Assoc Of Ct LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Endocrine Assoc Of Ct LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 15 clinicians in 2 Medicare specialties reassign their Medicare billing to Endocrine Assoc Of Ct LLC. 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 (10) and Nurse Practitioner (5). Of these, 2 practice at this address and 11 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Endocrine Assoc Of Ct LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 07D0988332) is associated with this NPI, valid through June 25, 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 Assoc Of Ct LLC was last updated on October 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days 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.