NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

John Sun, MD

Family Medicine Physician in Tomball, TX · enumerated 2005 · practices at Sun Family Practice Associates, PA.

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

National Provider Identifier

1821082165

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Registry record

Entity type Individual (Type 1)
Name John Sun
Credential MD
Sex Male
Practice address Tomball, TX, 77377
Phone (281) 357-8588
Fax (281) 357-8877
Enumeration date Sep 1, 2005
Last updated in NPPES Jan 6, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License K9912 (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
038412504 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

Where does John Sun practice?
The practice location on file with NPPES is in Tomball, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Sun?
The National Provider Identifier (NPI) for John Sun is 1821082165, 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 2020-01-06.