NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. Robert J Lazar, M.D.

Allergy & Immunology Physician in Traverse City, MI · enumerated 2006 · practices at Rheumatology Consulting PC.

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

National Provider Identifier

1831150770

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Registry record

Entity type Individual (Type 1)
Name Mr. Robert J Lazar
Credential M.D.
Sex Male
Practice address Traverse City, MI, 49684
Phone (231) 995-3657
Fax (231) 995-3658
Enumeration date Mar 30, 2006
Last updated in NPPES Apr 20, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 4301050475 (MI) Secondary
207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License 4301050475 (MI) Primary
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 Robert Lazar?
Robert Lazar is registered in NPPES with the primary taxonomy of Allergy & Immunology 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 2023-04-20.