Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Charles Chia-Chuen Hsu, M.D., PH.D.

Radiation Oncology Physician in Round Rock, TX · enumerated 2009.

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

National Provider Identifier

1033357991

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Registry record

Entity type Individual (Type 1)

Name Dr. Charles Chia-Chuen Hsu

Credential M.D., PH.D.

Sex Male

Practice address 2410 Round Rock Ave Ste 150, Round Rock, TX, 78681

Phone (512) 341-8724

Enumeration date Jan 30, 2009

Last updated in NPPES Aug 15, 2014

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License A110308 (CA) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License P6422 (TX) 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
322134301	Medicaid	TX	-
322134302	Medicaid	TX	-

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

Is NPI 1033357991 active?

Yes, as of the latest NPPES snapshot, NPI 1033357991 is active (record last updated 2014-08-15).

How do I verify Charles Hsu's NPI record?

Cross-check NPI 1033357991 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-08-15.