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Marsha Hillary Onan, M.D.

Ophthalmology Physician in Austin, TX · enumerated 2005.

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

National Provider Identifier

1376545186

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Registry record

Entity type Individual (Type 1)
Name Marsha Hillary Onan
Credential M.D.
Sex Female
Practice address 11111 Research Blvd, Suite 220, Austin, TX, 78759
Phone (512) 324-6755
Fax (512) 324-6753
Enumeration date Aug 11, 2005
Last updated in NPPES Aug 16, 2012

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License K3623 (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
117115905 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.

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Frequently asked questions

What is the NPI number for Marsha Onan?
The National Provider Identifier (NPI) for Marsha Onan is 1376545186, a Type 1 (individual) record in the CMS NPPES registry.
Where does Marsha Onan practice?
The practice location on file with NPPES is in Austin, TX. 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 2012-08-16.