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Dr. Mark S. Hsiao, M.D.

Orthopaedic Surgery of the Spine Physician in Alhambra, CA · enumerated 2006.

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

National Provider Identifier

1114008984

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark S. Hsiao
Credential M.D.
Sex Male
Practice address 707 S Garfield Ave Fl 2, Alhambra, CA, 91801
Phone (626) 282-1600
Fax (626) 656-1264
Enumeration date Oct 18, 2006
Last updated in NPPES May 7, 2024

Taxonomy & licenses

207XS0117X Orthopaedic Surgery of the Spine Physician Allopathic & Osteopathic Physicians · License MD61024463 (WA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

What is the NPI number for Mark Hsiao?
The National Provider Identifier (NPI) for Mark Hsiao is 1114008984, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Hsiao practice?
The practice location on file with NPPES is in Alhambra, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-05-07.