ALLERGY & PULMONARY SPECIALISTS PC
NPI 1275755902
Allergy & Immunology in Shelton, CT

Q: What is Allergy & Pulmonary Specialists PC's NPI number?

The NPI number for Allergy & Pulmonary Specialists PC is 1275755902. It was assigned to this organization in the NPPES registry on May 3, 2007.

Q: What is Allergy & Pulmonary Specialists PC's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Active since May 03, 2007

4 CORPORATE DR, SUITE 268, SHELTON, CT 06484(203) 402-0377(203) 402-0772 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 11, 2025, Aug 22, 2020 (2 updates tracked since 2020).

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About Allergy & Pulmonary Specialists Pc NPPES

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

ALLERGY & PULMONARY SPECIALISTS PC (NPI 1275755902) is a healthcare organization registered as an allergy & immunology in Shelton, Connecticut and active in the NPI registry since May 2007. The organization lists Nelson Tan Chao, President, as its authorized official.

NPPES Registry Identity

NPI1275755902

Entity TypeOrganization

Primary Taxonomy207K00000X

Legal Business NameALLERGY & PULMONARY SPECIALISTS PC

Location Address4 CORPORATE DR, SUITE 268Shelton, CT 06484-6211

Mailing Address4 Corporate Dr, Suite 268Shelton, CT 06484-6211 · (203) 402-0377 · Fax (203) 402-0772

Phone(203) 402-0377

Fax(203) 402-0772

Organization SubpartNo

Authorized OfficialNelson Tan ChaoPresident · (203) 402-0377

Enumeration DateMay 3, 2007

Last NPPES UpdateSeptember 11, 20252 updates tracked since enumeration

✔ NPI 1275755902 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in CT · 032857

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

Also ListedInternal MedicineTaxonomy 207R00000X · License 032857 (CT)

Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License 032857 (CT)

4 CORPORATE DR, Shelton, CT 06484

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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Allergy & Pulmonary Specialists Pc 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 Allergy & Pulmonary Specialists PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Nelson Chao, M.D.

Internal Medicine

NPI 1619974896

4 CORPORATE DR SUITE 268
Shelton, CT 06484

(203) 402-0377

✔ 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.

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 Allergy & Pulmonary Specialists PC's NPI number?

The NPI number for Allergy & Pulmonary Specialists PC is 1275755902. It was assigned to this organization in the NPPES registry on May 3, 2007.

Where is Allergy & Pulmonary Specialists PC located?

Allergy & Pulmonary Specialists PC is located at 4 Corporate Dr Suite 268, Shelton, CT 06484. The listed phone number is (203) 402-0377.

What is Allergy & Pulmonary Specialists PC's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Allergy & Pulmonary Specialists PC enrolled in Medicare?

Yes. Allergy & Pulmonary Specialists PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Allergy & Pulmonary Specialists PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Allergy & Pulmonary Specialists PC. 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.

When was this NPI record last updated?

The NPPES record for Allergy & Pulmonary Specialists PC was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.