Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ryan Chihien Tieu, O.D.

Optometrist in Kennesaw, GA · enumerated 2017.

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

National Provider Identifier

1023557931

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Registry record

Entity type Individual (Type 1)

Name Ryan Chihien Tieu

Credential O.D.

Sex Male

Practice address 1415 Wooten Lake Rd Nw, Kennesaw, GA, 30144

Phone (770) 792-3937

Fax (770) 847-2727

Enumeration date Feb 13, 2017

Last updated in NPPES Feb 13, 2017

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OPT002989 (GA) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1023557931 active?

Yes, as of the latest NPPES snapshot, NPI 1023557931 is active (record last updated 2017-02-13).

How do I verify Ryan Tieu's NPI record?

Cross-check NPI 1023557931 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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Chris Hobson Optometrist · Kennesaw, GA NPI 1467421073 H & T Eye Group, LLC Optometrist · Kennesaw, GA NPI 1841361920 Russell Anderson General Practice Dentistry · Kennesaw, GA NPI 1811068620 Tasman Eye Consultants PC Optometrist · Kennesaw, GA NPI 1043349368 Georgia Ophthalmology Referral Center, LLC Ophthalmology Physician · Kennesaw, GA NPI 1174772859 Jonathan Woolfson MD, PC Ophthalmology Physician · Kennesaw, GA NPI 1396066072 Lauren Daniel Optometrist · Kennesaw, GA NPI 1881436210

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-02-13.