C.T. WILLIAMS M.D .P.A,
C.T. WILLIAMS M.D .P.A, is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003081746, based in Houston, TX. It is classified under Specialist.
Getting there
Here is what surrounds this office in Houston, based on OpenStreetMap data collected Sep 4, 2026. Parking is available about 740 ft away. The nearest transit stop is 0.45 mi away, served by Pierce St @ Caroline St. A pharmacy sits 848 ft from the entrance (Mid Town Specialty RX Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.27 mi away.
Getting here and what is nearby
Hotel Downtowner Inns 377 ft ~2 min
2510 Hamilton Street, Houston 77004
Gas station Shell 696 ft ~3 min
Parking 667 ft ~3 min
Convenience King Fuels 729 ft ~3 min
2100 Hamilton Street
Parking 729 ft ~3 min
Parking 740 ft ~3 min
Restaurant Phil & Derek's Restaurant & Jazz Lounge 806 ft ~4 min
1701 Webster Street, Houston 77003
Mo-Fr 11:00-24:00; Sa 10:30-24:00; Su 10:30-16:00
Pharmacy Mid Town Specialty RX Pharmacy 848 ft ~4 min
1701 Webster Street, 77003
Coffee Kefita Coffee 0.27 mi ~6 min
2506 La Branch Street, Houston 77002
Mo-Fr 08:00-17:00; Sa-Su 09:00-16:00
Transit La Branch St at Gray St 0.31 mi ~7 min
Gas station Exxon 0.33 mi ~7 min
Restaurant Gypsy Poet 0.33 mi ~7 min
2404 Austin Street, Houston 77004
Tu-Th 17:00-21:00; Fr 12:00-14:00,17:00-22:00; Sa 14:00-22:00; Su 14:00-21:00
Transit 0.34 mi ~7 min
Gas station Z Fuel 0.38 mi ~8 min
Restaurant Kim Son 0.40 mi ~9 min
2001 Jefferson Street, Houston
Transit Pierce St @ Caroline St 0.45 mi ~9 min
Convenience Icebox 0.48 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| J8419 | TX | Specialist primary |
This provider holds licence J8419 issued in TX. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Specialist covers
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree. NUCC Health Care Provider Taxonomy, code 174400000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003081746 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Apr 24, 2008 |
| Last updated | Apr 24, 2008 |
| Status | Active |
| Practice address |
2424 HAMILTON ST 300 Houston, TX 77004 (713) 654-0808 Fax (713) 654-0808 |
| Other names |
C.t.williams M. D. , P.a. Professional Name |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 0 | 8 | 1 | 7 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 8 | 2 | 7 | 8 |
Sum = 54 · next multiple of 10 = 60 · check digit = 6 · actual last digit = 6
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.