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

Dr. Thomas D Marsden, DDS

General Practice Dentistry in San Angelo, TX · enumerated 2006.

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

National Provider Identifier

1437126919

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas D Marsden

Credential DDS

Sex Male

Practice address San Angelo, TX, 76901

Phone (325) 655-8992

Fax (325) 942-9088

Enumeration date Mar 3, 2006

Last updated in NPPES Feb 3, 2016

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 14662 (TX) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
752053696	Other	TX	TAX ID
0084154-01	Medicaid	TX	-
025963	Other	TX	AETNA ID

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 1437126919 active?

Yes, as of the latest NPPES snapshot, NPI 1437126919 is active (record last updated 2016-02-03).

How do I verify Thomas Marsden's NPI record?

Cross-check NPI 1437126919 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-03.