Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Thanasukarn, M.D.

Pediatrics Physician in Downey, CA · enumerated 2016 · practices at Jwch Institute, Inc.

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

National Provider Identifier

1144674003

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Registry record

Entity type Individual (Type 1)

Name John Thanasukarn

Credential M.D.

Sex Male

Practice address 8530 Firestone Blvd, Downey, CA, 90241

Phone (562) 867-7999

Enumeration date Apr 18, 2016

Last updated in NPPES Oct 7, 2025

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License A156685 (CA) 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

Where does John Thanasukarn practice?

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

What is the NPI number for John Thanasukarn?

The National Provider Identifier (NPI) for John Thanasukarn is 1144674003, 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 2025-10-07.