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MEDICAL ASSOCIATES, P.C.
NPI 1659539781
Internal Medicine - Infectious Disease in Elmhurst, NY

Active since May 27, 2008CLIA 33D1090782 · Waiver
8708 JUSTICE AVE, SUITE CS, ELMHURST, NY 11373(718) 779-9599(718) 779-9579 Get Directions Write a Review

NPPES record last updated: November 4, 2008. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Medical Associates, P.c. NPPES

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

MEDICAL ASSOCIATES, P.C. (NPI 1659539781) is a healthcare organization registered as an infectious disease in Elmhurst, New York and active in the NPI registry since May 2008. The organization holds a CLIA Waiver certificate valid through October 19, 2028 and lists Marie E Dy-guillaume, President, as its authorized official.

NPPES Registry Identity

NPI1659539781
Entity TypeOrganization
Primary Taxonomy207RI0200X
Legal Business NameMEDICAL ASSOCIATES, P.C.
Location Address8708 JUSTICE AVE, SUITE CSElmhurst, NY 11373-4575
Mailing Address8708 Justice Ave, Suite CsElmhurst, NY 11373-4575 · (718) 779-9599 · Fax (718) 779-9579
Phone(718) 779-9599
Fax(718) 779-9579
Organization SubpartNo
Authorized OfficialMarie E Dy-guillaumePresident · (718) 779-9599
Enumeration DateMay 27, 2008
Last NPPES UpdateNovember 4, 2008
✔ NPI 1659539781 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in NY · 201321
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
Also ListedInternal Medicine · GastroenterologyTaxonomy 207RG0100X · License 210261 (NY)
8708 JUSTICE AVE, Elmhurst, NY 11373
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Other Identifiers 2

Medicaid03028379NY
Medicare PINA100000101NY

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)

Medical Associates, P.c. 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 Medical Associates, P.C., which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Marie Dy-Guillaume, MD
Internal Medicine
NPI 1538123922
8708 JUSTICE AVE STE CS
Elmhurst, NY 11373
(718) 779-9599
✔ PECOS✔ Accepts MedicareSame address
Carl Guillaume, M.D.
Gastroenterology
NPI 1528098118
4422 3RD AVE
Bronx, NY 10457
(718) 960-6205
✔ PECOS✔ Accepts Medicare8.1 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 33D1090782

Medical Associates PC · Elmhurst, NY
Active · expires Oct 19, 2028
CLIA Number33D1090782
Laboratory TypePhysician Office
Certificate Effective DateOctober 20, 2026
Certificate Expiration DateOctober 19, 2028
Laboratory DirectorMarie E. Dy-Guillaume MD
Laboratory Phone(718) 779-9599
Laboratory LocationMedical Associates PC87-08 Justice Avenue Suite Cs, Elmhurst, NY 11373
CLIA data matches this NPI record on: 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 Medical Associates, P.C.'s NPI number?

The NPI number for Medical Associates, P.C. is 1659539781. It was assigned to this organization in the NPPES registry on May 27, 2008.

Where is Medical Associates, P.C. located?

Medical Associates, P.C. is located at 8708 Justice Ave Suite Cs, Elmhurst, NY 11373. The listed phone number is (718) 779-9599.

What is Medical Associates, P.C.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Medical Associates, P.C. enrolled in Medicare?

Yes. Medical Associates, P.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Medical Associates, P.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Medical Associates, P.C., in Gastroenterology and Internal 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, 1 practice at this address and 2 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Medical Associates, P.C. hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 33D1090782) is associated with this NPI, valid through October 19, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Medical Associates, P.C. was last updated on November 4, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.