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DIEGO A DIAZ MD PC
NPI 1689122913
Internal Medicine - Pulmonary Disease in New York, NY

Active since September 15, 2016CLIA 33D2127108 · Waiver
1041 3RD AVE, NEW YORK, NY 10065(212) 583-2956(212) 644-8666 Get Directions Write a Review

NPPES record last updated: September 15, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Diego A Diaz Md Pc NPPES

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

DIEGO A DIAZ MD PC (NPI 1689122913) is a healthcare organization registered as a pulmonary disease in New York, New York and active in the NPI registry since September 2016. The organization holds a CLIA Waiver certificate valid through March 8, 2027 and lists Diego A Diaz, Owner, as its authorized official.

NPPES Registry Identity

NPI1689122913
Entity TypeOrganization
Primary Taxonomy207RP1001X
Legal Business NameDIEGO A DIAZ MD PC
Location Address1041 3RD AVENew York, NY 10065-8114
Mailing Address1041 3rd AveNew York, NY 10065-8114 · (212) 583-2956 · Fax (212) 644-8666
Phone(212) 583-2956
Fax(212) 644-8666
Organization SubpartNo
Authorized OfficialDiego A DiazOwner · (212) 583-2853
Enumeration DateSeptember 15, 2016
✔ NPI 1689122913 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in NY · 211166
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
1041 3RD AVE, New York, NY 10065
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE 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)

Diego A Diaz Md Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Diego A Diaz MD PC, which bills Medicare for the services they deliver. Of these, 2 practice within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Diego Diaz, MD
Sleep Medicine
NPI 1942270467
110 E 59TH ST SUITE 9C
New York, NY 10022
(212) 583-2850
✔ PECOS0.2 mi
Klaus Dieter Lessnau, MD
Pulmonary Disease
NPI 1083684708
332 E 14TH ST
New York, NY 10003
(212) 481-3333
✔ PECOS✔ Accepts Medicare2.4 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 33D2127108

Diego A Diaz, MD, PC · New York, NY
Active · expires Mar 8, 2027
CLIA Number33D2127108
Laboratory TypePhysician Office
Certificate Effective DateMarch 9, 2025
Certificate Expiration DateMarch 8, 2027
Laboratory DirectorDr. Diego A. Diaz
Laboratory Phone(212) 538-2969
Laboratory LocationDiego A Diaz, MD, PC1041 3rd Avenue - Suite 203, New York, NY 10065
CLIA data matches this NPI record on: Address Name
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 Diego A Diaz MD PC's NPI number?

The NPI number for Diego A Diaz MD PC is 1689122913. It was assigned to this organization in the NPPES registry on September 15, 2016.

Where is Diego A Diaz MD PC located?

Diego A Diaz MD PC is located at 1041 3rd Ave, New York, NY 10065. The listed phone number is (212) 583-2956.

What is Diego A Diaz MD PC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Diego A Diaz MD PC enrolled in Medicare?

Yes. Diego A Diaz MD PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Diego A Diaz MD PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Diego A Diaz MD PC, in Pulmonary Disease and Sleep Medicine. 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, 2 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Diego A Diaz MD PC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 33D2127108) is associated with this NPI, valid through March 8, 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 Diego A Diaz MD PC was last updated on September 15, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.