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

David Lieb, M.D.

Cardiovascular Disease Physician in Chicago, IL · enumerated 2005.

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

National Provider Identifier

1245226356

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Registry record

Entity type Individual (Type 1)

Name David Lieb

Credential M.D.

Sex Male

Practice address Chicago, IL, 60602

Phone (773) 726-9515

Fax (312) 726-1681

Enumeration date Sep 23, 2005

Last updated in NPPES Oct 21, 2014

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

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 036050096 (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
036050096	Medicaid	IL	-
791062505	Other	IL	RAILROAD MEDICARE
21607511	Other	IL	BLUE SHIELD

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 David Lieb?

David Lieb is registered in NPPES with the primary taxonomy of Cardiovascular Disease 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 2014-10-21.