Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas W. Porter III, M.D.

Internal Medicine Physician in Pasadena, TX · enumerated 2006 · practices at Harris County Hospital District.

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

National Provider Identifier

1235230574

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas W. Porter III

Credential M.D.

Sex Male

Practice address 927 Shaw Ave, Pasadena, TX, 77506

Phone (713) 982-5900

Fax (281) 431-9181

Enumeration date Sep 26, 2006

Last updated in NPPES Feb 28, 2011

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License J2743 (TX) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License J2743 (TX) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License J2742 (TX) Secondary

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

How do I verify Thomas Porter's NPI record?

Cross-check NPI 1235230574 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1235230574 active?

Yes, as of the latest NPPES snapshot, NPI 1235230574 is active (record last updated 2011-02-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-02-28.