Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Byron I Eisenstein, MD

Specialist in Arlington Heights, IL · enumerated 2005.

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

National Provider Identifier

1851397350

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Registry record

Entity type Individual (Type 1)

Name Dr. Byron I Eisenstein

Credential MD

Sex Male

Practice address 880 W Central Rd, Ste 7200, Arlington Heights, IL, 60005

Phone (847) 259-2530

Fax (847) 259-2536

Enumeration date Jun 21, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers 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 Byron Eisenstein?

Byron Eisenstein is registered in NPPES with the primary taxonomy of Specialist. 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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Cristian Speil Infectious Disease Physician · Arlington Heights, IL NPI 1346243730 Henry Rabinowitz Specialist · Arlington Heights, IL NPI 1063418564 Manjeet Sethi Cardiovascular Disease Physician · Arlington Heights, IL NPI 1205833845 Roger Nissen Cardiovascular Disease Physician · Arlington Hts, IL NPI 1952308587 Vern Kerchberger Infectious Disease Physician · Arlington Heights, IL NPI 1396746046 Guy Kochvar Infectious Disease Physician · Arlington Heights, IL NPI 1558362079 James Ramsay Pediatrics Physician · Arlington Heights, IL NPI 1699767228 Randy Rich Hematology & Oncology Physician · Arlington Heights, IL NPI 1609863281

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.