Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Tad Gerlinger, M.D.

Adult Reconstructive Orthopaedic Surgery Physician in Chicago, IL · enumerated 2005.

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

National Provider Identifier

1922097971

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Registry record

Entity type Individual (Type 1)

Name Dr. Tad Gerlinger

Credential M.D.

Sex Male

Practice address 1611 W Harrison St, Suite 400, Chicago, IL, 60612

Phone (312) 432-2300

Fax (312) 942-1517

Enumeration date Oct 20, 2005

Last updated in NPPES Apr 4, 2014

Taxonomy & licenses

207XS0114X Adult Reconstructive Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 036111139 (IL) Primary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 23111 (WV) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License M4089 (TX) Secondary

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
036111139	Medicaid	IL	-
GE4234051	Other	WV	MEDICARE PTAN
1633878	Other	IL	BCBS 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.

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Frequently asked questions

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.

What specialty is Tad Gerlinger?

Tad Gerlinger is registered in NPPES with the primary taxonomy of Adult Reconstructive Orthopaedic Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-04.