Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Okay Atilla Onan, M.D.

Q: What is the NPI number for Okay Onan?

The National Provider Identifier (NPI) for Okay Onan is 1841297843, a Type 1 (individual) record in the CMS NPPES registry.

Orthopaedic Surgery of the Spine Physician in Austin, TX · enumerated 2005.

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

National Provider Identifier

1841297843

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Registry record

Entity type Individual (Type 1)

Name Okay Atilla Onan

Credential M.D.

Sex Male

Practice address 4700 Seton Center Pkwy Ste 200, Suite 200, Austin, TX, 78759

Phone (512) 439-1000

Fax (512) 439-1081

Enumeration date Jul 5, 2005

Last updated in NPPES Mar 26, 2026

Taxonomy & licenses

207XS0117X Orthopaedic Surgery of the Spine Physician Allopathic & Osteopathic Physicians · License K3624 (TX) Primary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License K3624 (TX) Secondary

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
P00033809	Other	-	MEDICARE RAILROAD

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

Where does Okay Onan practice?

The practice location on file with NPPES is in Austin, TX. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Okay Onan?

The National Provider Identifier (NPI) for Okay Onan is 1841297843, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-26.