Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Thomas Hsu, M.D.
Urology Physician in Palo Alto, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1851433833
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Registry record
Entity type Individual (Type 1)
Name Dr. Thomas Hsu
Credential M.D.
Sex Male
Practice address 875 Blake Wilbur Dr, Stanford Cancer Center, Palo Alto, CA, 94304
Phone (659) 725-5544
Enumeration date Feb 13, 2007
Last updated in NPPES Dec 13, 2021
Taxonomy & licenses
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 |
|---|---|---|---|
| 00A788610 | Medicaid | CA | - |
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.
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 Thomas Hsu?
Thomas Hsu is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Jane Huang Medical Oncology Physician · Palo Alto, CA NPI 1033296090 Lawrence Recht Neurology Physician · Palo Alto, CA NPI 1417007469 Charlotte Jacobs Internal Medicine Physician · Palo Alto, CA NPI 1225184245 Iris Gibbs Radiation Oncology Physician · Palo Alto, CA NPI 1407994429 Jennifer Kao Specialist · Palo Alto, CA NPI 1689714248 Don Goffinet Therapeutic Radiology Physician · Palo Alto, CA NPI 1780724427 Sean Bohen Medical Oncology Physician · Palo Alto, CA NPI 1194869685 Mark Lee Medical Oncology Physician · Palo Alto, CA NPI 1881738003
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-13.