NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. James Weisberger, M.D.

Hematology (Pathology) Physician in Elmwood Park, NJ · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1336289578

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Registry record

Entity type Individual (Type 1)
Name Dr. James Weisberger
Credential M.D.
Sex Male
Practice address 481 Edward H Ross Dr, Elmwood Park, NJ, 07407
Phone (201) 791-2600
Enumeration date Feb 7, 2007
Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 25MA06980700 (NJ) Secondary
207ZH0000X Hematology (Pathology) Physician Allopathic & Osteopathic Physicians · License 25MA06980700 (NJ) Primary
207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 25MA06980700 (NJ) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What specialty is James Weisberger?
James Weisberger is registered in NPPES with the primary taxonomy of Hematology (Pathology) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.