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A WALK-IN MEDICAL CENTER
NPI 1043346539
Clinic/Center - Urgent Care in Newington, CT

Active since February 26, 2007CLIA 07D1070334 · Waiver
66 CEDAR ST, STE 100, NEWINGTON, CT 06111(860) 436-3226(860) 436-3229 Get Directions Write a Review

NPPES record last updated: July 2, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About A Walk-in Medical Center NPPES

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

A WALK-IN MEDICAL CENTER (NPI 1043346539) is a healthcare organization registered as an urgent care in Newington, Connecticut and active in the NPI registry since February 2007. The organization holds a CLIA Waiver certificate valid through June 25, 2027 and lists Stuart C Calle, Owner/doctor, as its authorized official.

NPPES Registry Identity

NPI1043346539
Entity TypeOrganization
Primary Taxonomy261QU0200X
Legal Business NameA WALK-IN MEDICAL CENTER
Location Address66 CEDAR ST, STE 100Newington, CT 06111-2646
Mailing Address66 Cedar St, Ste 100Newington, CT 06111-2646 · (860) 436-3226 · Fax (860) 436-3229
Phone(860) 436-3226
Fax(860) 436-3229
Organization SubpartNo
Authorized OfficialStuart C CalleOwner/doctor · (860) 436-3226
Enumeration DateFebruary 26, 2007
Last NPPES UpdateJuly 2, 2024
✔ NPI 1043346539 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Urgent CareAmbulatory Health Care Facilities
Taxonomy Code261QU0200X
License✔ Licensed in CT · 036038
66 CEDAR ST, Newington, CT 06111
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.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)

A Walk-in Medical Center is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to A Walk-In Medical Center, which bills Medicare for the services this clinician delivers.

Clinician (1)

Stuart Calle, MD
Emergency Medicine
NPI 1740399302
66 CEDAR ST STE 100
Newington, CT 06111
(860) 436-3226
✔ PECOS✔ Accepts MedicareSame address

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 07D1070334

A Walk-In Medical Center, LLC · Newington, CT
Active · expires Jun 25, 2027
CLIA Number07D1070334
Laboratory TypeUrgent Care
Certificate Effective DateJune 26, 2025
Certificate Expiration DateJune 25, 2027
Laboratory DirectorStuart C. Calle, MD
Laboratory Phone(860) 436-3226
Laboratory LocationA Walk-In Medical Center, LLC66 Cedar St, Ste 100, Newington, CT 06111
CLIA data matches this NPI record on: Address Name 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 A Walk-In Medical Center's NPI number?

The NPI number for A Walk-In Medical Center is 1043346539. It was assigned to this organization in the NPPES registry on February 26, 2007.

Where is A Walk-In Medical Center located?

A Walk-In Medical Center is located at 66 Cedar St Ste 100, Newington, CT 06111. The listed phone number is (860) 436-3226.

What is A Walk-In Medical Center's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Urgent Care, with taxonomy code 261QU0200X.

Is A Walk-In Medical Center enrolled in Medicare?

Yes. A Walk-In Medical Center is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through A Walk-In Medical Center?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Emergency Medicine) reassigns their Medicare billing to A Walk-In Medical Center. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does A Walk-In Medical Center hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 07D1070334) is associated with this NPI, valid through June 25, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does A Walk-In Medical Center accept?

Health plans from Anthem Blue Cross and Blue Shield list A Walk-In Medical Center 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 A Walk-In Medical Center was last updated on July 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.