Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Timothy Tinyau Chang, MD PHD

Orthopaedic Surgery Physician in Hopkinsville, KY · enumerated 2006.

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

National Provider Identifier

1740256569

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Registry record

Entity type Individual (Type 1)

Name Dr. Timothy Tinyau Chang

Credential MD PHD

Sex Male

Practice address 105 Keeton Dr, Hopkinsville, KY, 42240

Phone (270) 798-8372

Enumeration date Feb 23, 2006

Last updated in NPPES Jun 10, 2020

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License MD9765 (HI) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 44797 (KY) Primary

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 Timothy Chang?

Timothy Chang is registered in NPPES with the primary taxonomy of 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 2020-06-10.