Thomas Markus, O.D.
NPI 1467419903 · Optometrist · Houston, TX
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Markus, O.D. is a Optometrist provider in Houston, TX (NPI 1467419903).
Provider details
- NPI number
- 1467419903
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4998TG (TX)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,362 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Problem Focused Exam of Visual System92012 | 744 | $84 |
| Imaging of Retina92134 | 407 | $38 |
| Photography of the Retina92250 | 278 | $35 |
| Established Patient Complete Exam of Visual System92014 | 254 | $119 |
| Exam of Visual Field With Extended Testing92083 | 219 | $60 |
| Imaging of Optic Nerve92133 | 186 | $33 |
| Microfluid Analysis of Tears83861 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 217 | 70 |
| Timolol Maleate | 131 | 33 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 105 | 37 |
| Brimonidine Tartrate | 86 | 29 |
| Prednisolone Acetate | 57 | 39 |
| Brimonidine Tartrate/Timololbrand: Brimonidine Tartrate-Timolol | 47 | 14 |
| Fluorometholone | 45 | 22 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$269 across 12 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-27
- Last updated
- 2025-05-29
Frequently asked questions
- What is Thomas Markus's NPI number?
- Thomas Markus's National Provider Identifier (NPI) is 1467419903, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Markus's specialty?
- Thomas Markus is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Thomas Markus located?
- Thomas Markus's practice location on file with NPPES is 13333 Dotson Rd., Houston, TX 77070-4305.
- What is Thomas Markus's phone number?
- The practice phone number listed in the NPPES registry for Thomas Markus is (281) 890-1784.
- Does Thomas Markus accept Medicare?
- Thomas Markus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Markus's NPI active?
- Yes — Thomas Markus's NPI (1467419903) is active in the NPPES registry as of the last update on 2025-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.