William Horton, RPH
William Horton, RPH is a Pharmacist in Clemson, SC, registered under NPI 1003197005. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Clemson, based on OpenStreetMap data collected Sep 11, 2026. Parking is available about 0.32 mi away. The nearest transit stop is 110 ft away. If you arrive early, there is a coffee shop 0.47 mi away.
Getting here and what is nearby
Transit 110 ft ~1 min
Restaurant Domino's 127 ft ~1 min
501 Old Greenville Highway, Clemson 29631
Mo-Th 10:30-24:00; Fr-Sa 10:30-02:00; Su 10:30-24:00
Parking 192 ft ~1 min
Restaurant Burger King 492 ft ~2 min
510 Old Greenville Highway, Clemson 29631
Mo-Sa 06:00-22:00; Su 07:00-22:00
Restaurant Tony's Pizza 671 ft ~3 min
500 Old Greenville Highway, Clemson 29631
Parking 768 ft ~3 min
Gas station Marathon 821 ft ~4 min
Hotel Courtyard Clemson 958 ft ~4 min
Parking 0.32 mi ~7 min
Hotel Days Inn by Wyndham Clemson 0.42 mi ~9 min
Hotel Holiday Inn Express & Suites Clemson - Univ Area 0.44 mi ~9 min
Coffee Moe Joe 0.47 mi ~10 min
385 Old Greenville Highway, Clemson 29631
Grocery Publix 0.49 mi ~10 min
1390 Tiger Boulevard, Clemson 29631-2617
Mo-Su 07:00-22:00
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 |
|---|---|---|
| 3871 | SC | Pharmacist primary |
This provider holds licence 3871 issued in SC. 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 Pharmacist covers
An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. The practice of pharmacy includes, but is not limited to, assessment, interpretation, evaluation, and implementation, initiation, monitoring or modification of medication and or medical orders; the compounding or dispensing of medication and or medical orders; participation in drug and device procurement, storage, and selection; drug administration; drug regimen reviews; drug or drug-related research; provision of patient education and the provision of those acts or services necessary to provide medication therapy management services in all areas of patient care. NUCC Health Care Provider Taxonomy, code 183500000X
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 | 1003197005 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 2, 2011 |
| Last updated | Sep 8, 2011 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | RPH |
| Practice address |
501 OLD GREENVILLE HWY Clemson, SC 29631 (864) 653-6185 Fax (864) 653-9561 |
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 | 1 | 9 | 7 | 0 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 9 | 5 | 0 | 0 |
Sum = 45 · next multiple of 10 = 50 · check digit = 5 · actual last digit = 5
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.