UNION COUNTY INFECTIOUS DISEASES GROUP
NPI 1235109158
Internal Medicine - Infectious Disease in Elizabeth, NJ

Q: What is Union County Infectious Diseases Group's specialty?

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

Active since January 24, 2006

240 WILLIAMSON ST STE 401, ELIZABETH, NJ 07202(908) 282-0500(908) 282-1482 Get Directions Write a Review

NPPES record last updated: March 4, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 4, 2020, Dec 24, 2019 (2 updates tracked since 2019).

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About Union County Infectious Diseases Group NPPES

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

UNION COUNTY INFECTIOUS DISEASES GROUP (NPI 1235109158) is a healthcare organization registered as an infectious disease in Elizabeth, New Jersey and active in the NPI registry since January 2006. The organization maintains a secondary practice location in Elizabeth and lists William Farrer, Md, as its authorized official.

NPPES Registry Identity

NPI1235109158

Entity TypeOrganization

Primary Taxonomy207RI0200X

Legal Business NameUNION COUNTY INFECTIOUS DISEASES GROUP

Location Address240 WILLIAMSON ST STE 401Elizabeth, NJ 07202-3672

Mailing Address240 Williamson St Ste 401Elizabeth, NJ 07202-3672 · (908) 282-0500 · Fax (908) 282-1482

Phone(908) 282-0500

Fax(908) 282-1482

Organization SubpartNo

Authorized OfficialWilliam FarrerMd · (646) 517-1257

Enumeration DateJanuary 24, 2006

Last NPPES UpdateMarch 4, 20202 updates tracked since enumeration

NPPES CertifiedMarch 4, 2020

✔ NPI 1235109158 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RI0200X

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.

240 WILLIAMSON ST STE 401, Elizabeth, NJ 07202

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Secondary Practice Location 1

Location 1225 Williamson StElizabeth, NJ 07202-3625 · Phone (908) 994-5010 · Fax (908) 355-9583

Other Identifiers 1

Medicaid7732805NJ

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)

Union County Infectious Diseases Group is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 2 clinicians reassign Medicare billing to Union County Infectious Diseases Group, 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)

Clark Sherer, MD

Infectious Disease

NPI 1629048541

225 WILLIAMSON ST
Elizabeth, NJ 07202

(908) 325-6322

✔ PECOS✔ Accepts MedicareSame address

Julius Salamera, M.D.

Infectious Disease

NPI 1548418791

655 LIVINGSTON ST
Elizabeth, NJ 07206

(908) 994-7600

✔ PECOS✔ Accepts Medicare0.9 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 Union County Infectious Diseases Group's NPI number?

The NPI number for Union County Infectious Diseases Group is 1235109158. It was assigned to this organization in the NPPES registry on January 24, 2006.

Where is Union County Infectious Diseases Group located?

Union County Infectious Diseases Group is located at 240 Williamson St Ste 401, Elizabeth, NJ 07202. The listed phone number is (908) 282-0500.

What is Union County Infectious Diseases Group's specialty?

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

Is Union County Infectious Diseases Group enrolled in Medicare?

Yes. Union County Infectious Diseases Group is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Union County Infectious Diseases Group?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Infectious Disease, reassign their Medicare billing to Union County Infectious Diseases Group. 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.

When was this NPI record last updated?

The NPPES record for Union County Infectious Diseases Group was last updated on March 4, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.