Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas Yun, MD

Psychiatry Physician in Atlanta, GA · enumerated 2005.

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

National Provider Identifier

1245231133

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Registry record

Entity type Individual (Type 1)

Name Thomas Yun

Credential MD

Sex Male

Practice address 424 Decatur St Se, Atlanta, GA, 30312

Phone (788) 438-6006

Enumeration date Aug 2, 2005

Last updated in NPPES Nov 6, 2023

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License A97128 (CA) Secondary

2084A0401X Addiction Medicine (Psychiatry & Neurology) Physician Allopathic & Osteopathic Physicians · License A97128 (CA) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 71040 (GA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1245231133 active?

Yes, as of the latest NPPES snapshot, NPI 1245231133 is active (record last updated 2023-11-06).

How do I verify Thomas Yun's NPI record?

Cross-check NPI 1245231133 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 2023-11-06.