Sean Townsend, M.D.
Sean Townsend, M.D. is an Internal Medicine Physician in Plano, TX, registered under NPI 1003259458.
Getting there
Here is what surrounds this office in Plano, based on OpenStreetMap data collected Sep 14, 2026. Parking is available about 906 ft away. The nearest transit stop is 0.20 mi away, served by Preston @ Plano - S - FS. A pharmacy sits 0.31 mi from the entrance (Medscript Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.40 mi away.
Getting here and what is nearby
Parking 266 ft ~2 min
Parking 362 ft ~2 min
Hotel La Quinta Inn & Suites 427 ft ~2 min
Hotel Fairfield Inn & Suites 542 ft ~3 min
Hotel Studio 6 583 ft ~3 min
4704 West Plano Parkway
Restaurant IHOP 559 ft ~3 min
4804 West Plano Parkway
Restaurant Jollibee 688 ft ~3 min
1016 Preston Road
Restaurant Taco Bell 746 ft ~3 min
1020 Preston Road, Plano 75093
Mo-Th 08:00-03:00; Fr-Sa 08:00-04:00; Su 08:00-03:00
Transit Plano @ Eastside Connector - E - FS 770 ft ~3 min
Transit Preston @ Alliance - N - NS 817 ft ~4 min
Parking 906 ft ~4 min
Transit Preston @ Plano - S - FS 0.20 mi ~4 min
Coffee 151 Coffee 0.23 mi ~5 min
Gas station Shell 0.29 mi ~6 min
Convenience 7-Eleven 0.31 mi ~7 min
Pharmacy Medscript Pharmacy 0.31 mi ~7 min
1101 Ohio Drive, Plano 75093
Convenience QuikTrip 0.32 mi ~7 min
Gas station QuikTrip 0.32 mi ~7 min
Coffee Black Sheep Coffee 0.40 mi ~8 min
1501 Preston Road
Convenience Circle K 0.48 mi ~10 min
19109 Preston Road
Gas station Valero 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 |
|---|---|---|
| Q3454 | TX | Internal Medicine Physician primary |
This provider holds licence Q3454 issued in TX. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Internal Medicine
- PAC ID
- 3375823198
- Enrollment ID
- I20161213000443
Medicare enrolment is recorded as approved under the provider type Practitioner - Internal Medicine. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Internal Medicine covers
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs. NUCC Health Care Provider Taxonomy, code 207R00000X
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-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003259458 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 15, 2013 |
| Last updated | Apr 12, 2022 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | M.D. |
| Practice address |
4716 ALLIANCE BLVD SUITE 500 Plano, TX 75093 (469) 800-6000 Fax (469) 800-6052 |
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 | 2 | 5 | 9 | 4 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 5 | 9 | 4 | 1 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
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.