Maylen Castro Guerra
Maylen Castro Guerra is a Family Nurse Practitioner in Houston, TX, registered under NPI 1003438615. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 26, 2026. Parking is available about 466 ft away. If you arrive early, there is a coffee shop 0.43 mi away.
Getting here and what is nearby
Parking 193 ft ~1 min
Parking 194 ft ~1 min
Restaurant Amar - Indian European Cuisine 320 ft ~2 min
Parking 466 ft ~2 min
Hotel Courtyard Houston I-10 West/Park Row 0.38 mi ~8 min
Hotel Residence Inn Houston I-10 West/Park Row 0.38 mi ~8 min
Hotel Hampton Inn & Suites Houston I-10 West Park Row 0.39 mi ~8 min
Restaurant Subway 0.42 mi ~9 min
1520 Barker Cypress, Houston 77084
Mo-Fr 07:00-22:00; Sa 08:00-21:00; Su 09:00-21:00
Restaurant Gyro Hut 0.42 mi ~9 min
Coffee Starbucks 0.43 mi ~9 min
Convenience Race One 0.43 mi ~9 min
Gas station Exxon 0.43 mi ~9 min
Convenience Mr. Express 0.48 mi ~10 min
Gas station Shell 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 |
|---|---|---|
| 1081260 | TX | Family Nurse Practitioner primary |
| 988416 | TX | Registered Nurse |
This provider holds licence 1081260 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 - Nurse Practitioner
- PAC ID
- 6709257082
- Enrollment ID
- I20230124002816
Medicare enrolment is recorded as approved under the provider type Practitioner - Nurse Practitioner. 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 Family covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LF0000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 363LF0000X | Family Nurse Practitioner Family | 1081260 | TX | primary |
| 163W00000X | Registered Nurse | 988416 | TX |
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 | 1003438615 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 18, 2020 |
| Last updated | Feb 14, 2024 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Practice address |
1888 BARKER CYPRESS RD Houston, TX 77084 (281) 840-1455 |
| Other names |
Maylen Castro Guerra Doing Business As |
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 | 4 | 3 | 8 | 6 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 3 | 7 | 6 | 2 |
Sum = 55 · next multiple of 10 = 60 · 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.