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PEI SUN MD.LLC
NPI 1831412899
Clinic/Center - Primary Care in Wallingford, CT

Active since March 04, 2010
850 N MAIN STREET EXT, BUILDING1,A3, WALLINGFORD, CT 06492(203) 269-4353(203) 269-4606 Get Directions Write a Review

NPPES record last updated: April 4, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Pei Sun Md.llc NPPES

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

PEI SUN MD.LLC (NPI 1831412899) is a healthcare organization registered as a primary care in Wallingford, Connecticut and active in the NPI registry since March 2010. The organization lists Pei Fang Sun, Owner, as its authorized official.

NPPES Registry Identity

NPI1831412899
Entity TypeOrganization
Primary Taxonomy261QP2300X
Legal Business NamePEI SUN MD.LLC
Location Address850 N MAIN STREET EXT, BUILDING1,A3Wallingford, CT 06492-2400
Mailing Address850 N Main Street Ext, Building1,a3Wallingford, CT 06492-2400 · (203) 269-4353 · Fax (203) 269-4606
Phone(203) 269-4353
Fax(203) 269-4606
Organization SubpartNo
Authorized OfficialPei Fang SunOwner · (203) 269-4353
Enumeration DateMarch 4, 2010
Last NPPES UpdateApril 4, 2011
✔ NPI 1831412899 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Primary CareAmbulatory Health Care Facilities
Taxonomy Code261QP2300X
License✔ Licensed in CT · 037546
850 N MAIN STREET EXT, Wallingford, CT 06492
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Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Pei Sun Md.llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Pei Sun MD.LLC, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 4 within 10 miles. They are listed nearest first.

Clinicians, nearest first (4)

Christopher Sullivan, APRN
Nurse Practitioner
NPI 1598297665
850 N MAIN STREET EXT BUILDING 1, A3
Wallingford, CT 06492
(203) 269-4353
✔ PECOS✔ Accepts MedicareSame address
Francesca Michel, APRN
Nurse Practitioner
NPI 1871326140
850 N MAIN STREET EXT # 3A
Wallingford, CT 06492
(203) 269-4353
✔ PECOS✔ Accepts MedicareSame address
Yidi Ge, MD
Internal Medicine
NPI 1417489253
850 N MAIN STREET EXT STE 1A3
Wallingford, CT 06492
(203) 269-4353
✔ PECOS✔ Accepts MedicareSame address
Pei Sun, MD
Internal Medicine
NPI 1225171754
850 N MAIN STREET EXT BUILDING1,A3
Wallingford, CT 06492
(203) 269-4353
✔ PECOS✔ Accepts Medicare1.5 mi

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 Pei Sun Md.Llc's NPI number?

The NPI number for Pei Sun Md.Llc is 1831412899. It was assigned to this organization in the NPPES registry on March 4, 2010.

Where is Pei Sun Md.Llc located?

Pei Sun Md.Llc is located at 850 N Main Street Ext Building1,a3, Wallingford, CT 06492. The listed phone number is (203) 269-4353.

What is Pei Sun Md.Llc's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Primary Care, with taxonomy code 261QP2300X.

Is Pei Sun Md.Llc enrolled in Medicare?

Yes. Pei Sun Md.Llc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Pei Sun Md.Llc?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians reassign their Medicare billing to Pei Sun Md.Llc, in Internal Medicine and Nurse Practitioner. 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. Of these, 3 practice at this address and 4 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 Pei Sun Md.Llc was last updated on April 4, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.