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WESTFIELD INTERNAL MEDICINE
NPI 1831448323
Internal Medicine in Westfield, NJ

Active since August 30, 2012CLIA 31D1015255 · Waiver
220 ELMER STREET, WESTFIELD, NJ 07090(908) 654-1190(908) 232-1728 Get Directions Write a Review

NPPES record last updated: August 30, 2012. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Westfield Internal Medicine NPPES

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

WESTFIELD INTERNAL MEDICINE (NPI 1831448323) is a healthcare organization registered as an internal medicine in Westfield, New Jersey and active in the NPI registry since August 2012. The organization holds a CLIA Waiver certificate valid through July 27, 2027 and lists Joseph Derosa, Doctor, as its authorized official.

NPPES Registry Identity

NPI1831448323
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameJOSEPH DEROSA, MD, LLC
Location Address220 ELMER STREETWestfield, NJ 07090
Mailing Address220 Elmer StreetWestfield, NJ 07090 · (908) 654-1190 · Fax (908) 232-1728
Phone(908) 654-1190
Fax(908) 232-1728
Organization SubpartNo
Authorized OfficialJoseph DerosaDoctor · (908) 654-1190
Enumeration DateAugust 30, 2012
✔ NPI 1831448323 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
220 ELMER STREET, Westfield, NJ 07090
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Other Names 1

Doing Business AsWestfield Internal Medicine

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

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 31D1015255

Joseph Derosa MD LLC · Westfield, NJ
Active · expires Jul 27, 2027
CLIA Number31D1015255
Laboratory TypePhysician Office
Certificate Effective DateJuly 28, 2025
Certificate Expiration DateJuly 27, 2027
Laboratory DirectorJoseph Derosa
Laboratory Phone(908) 654-1190
Laboratory LocationJoseph Derosa MD LLC220 Elmer Street, Westfield, NJ 07090
CLIA data matches this NPI record on: Address 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 Joseph Derosa, MD, LLC's NPI number?

The NPI number for Joseph Derosa, MD, LLC is 1831448323. It was assigned to this organization in the NPPES registry on August 30, 2012. The provider is doing business as Westfield Internal Medicine.

Where is Joseph Derosa, MD, LLC located?

Joseph Derosa, MD, LLC is located at 220 Elmer Street, Westfield, NJ 07090. The listed phone number is (908) 654-1190.

What is Joseph Derosa, MD, LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Does Joseph Derosa, MD, LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 31D1015255) is associated with this NPI, valid through July 27, 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 Joseph Derosa, MD, LLC was last updated on August 30, 2012. NPI Profile syncs with the weekly NPPES data releases published by CMS.