Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Thomas James Markus, O.D.
Optometrist in Houston, TX · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1467419903
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Registry record
Entity type Individual (Type 1)
Name Mr. Thomas James Markus
Credential O.D.
Sex Male
Practice address 13333 Dotson Rd., Suite 200, Houston, TX, 77070
Phone (281) 890-1784
Fax (281) 890-5733
Enumeration date Apr 27, 2006
Last updated in NPPES May 29, 2025
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1548224-10 | 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.
Frequently asked questions
Where does Thomas Markus practice?
The practice location on file with NPPES is in Houston, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Thomas Markus?
The National Provider Identifier (NPI) for Thomas Markus is 1467419903, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-29.