Silas Luna, PA
Silas Luna, PA is a Medical Physician Assistant in Houston, TX, registered under NPI 1003395872. 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 Houston, based on OpenStreetMap data collected Sep 13, 2026. Parking is available about 286 ft away. A pharmacy sits 0.35 mi from the entrance (CVS 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
Parking 204 ft ~1 min
Parking 229 ft ~1 min
Parking 286 ft ~2 min
Restaurant JINYA Ramen Bar 372 ft ~2 min
449 West 19th Street, Houston
Restaurant Hopdoddy 445 ft ~2 min
449 West 19th Street, Houston
Coffee Jeni's Ice Creams 576 ft ~3 min
375 West 19th Street, Houston
Restaurant Zapvor by Thai Spice 657 ft ~3 min
460 West 19th Street, Houston
Coffee Dandelion Cafe 0.25 mi ~6 min
611 West 22nd Street
Grocery Kroger 0.26 mi ~6 min
239 West 20th Street, Houston 77008
Mo-Su 07:00-23:00
Coffee Boomtown Coffee 0.27 mi ~6 min
Pharmacy Walgreens 0.30 mi ~6 min
Pharmacy H-E-B Pharmacy 0.32 mi ~7 min
2300 North Shepherd Drive, Houston 77008
Mo-Fr 08:00-20:00; Sa 09:00-18:00; Su 10:00-17:00
Grocery H-E-B 0.33 mi ~7 min
Pharmacy CVS Pharmacy 0.35 mi ~8 min
Convenience Star Stop 0.42 mi ~9 min
2440 North Shepherd Drive, Houston
Convenience Circle K 0.44 mi ~9 min
Gas station Chevron 0.44 mi ~9 min
Gas station Circle K 0.45 mi ~9 min
Convenience Izzi Market 0.49 mi ~10 min
2503 Yale Street, Houston
Gas station Chevron 0.50 mi ~11 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 |
|---|---|---|
| PA12129 | TX | Medical Physician Assistant primary |
This provider holds licence PA12129 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 - Physician Assistant
- PAC ID
- 9931535069
- Enrollment ID
- I20200207001019
Medicare enrolment is recorded as approved under the provider type Practitioner - Physician Assistant. 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 Medical covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363AM0700X
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 | 1003395872 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 12, 2018 |
| Last updated | Aug 12, 2018 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | PA |
| Practice address |
427 W 20TH ST STE 210 Houston, TX 77008 (713) 862-3425 |
| Mailing address |
155 BIRDSALL ST APT 140 Houston, TX 77007 |
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 | 3 | 9 | 5 | 8 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 9 | 1 | 8 | 5 |
Sum = 58 · next multiple of 10 = 60 · check digit = 2 · actual last digit = 2
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.