Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jeffrey I Frank, MD

Neurology Physician in Buffalo Grove, IL · enumerated 2007.

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

National Provider Identifier

1477604452

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Registry record

Entity type Individual (Type 1)

Name Jeffrey I Frank

Credential MD

Sex Male

Practice address 355 W Dundee Rd, Ste 110, Buffalo Grove, IL, 60089

Phone (773) 612-8399

Fax (847) 520-0500

Enumeration date Jan 16, 2007

Last updated in NPPES Jun 8, 2017

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 036075689 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
036075689	Medicaid	IL	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Jeffrey Frank?

Jeffrey Frank is registered in NPPES with the primary taxonomy of Neurology 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 2017-06-08.