Monica Vallejo Neacato, MD
Monica Vallejo Neacato, MD is a provider specialising in Student in an Organized Health Care Education/Training Program in Mercedes, TX, registered under NPI 1003663964.
Getting there
Here is what surrounds this office in Mercedes, based on OpenStreetMap data collected Oct 13, 2026. Parking is available about 923 ft away. There is EV charging 359 ft from the office (Tesla Supercharger) — useful if you are driving in from out of town.
Getting here and what is nearby
Restaurant Chick-fil-A 168 ft ~1 min
Gas station Shell 196 ft ~1 min
8001 East Expressway 83, Mercedes 78570
EV charging Tesla Supercharger 359 ft ~2 min
Restaurant Wendy's 347 ft ~2 min
Parking 741 ft ~3 min
Parking 892 ft ~4 min
Parking 923 ft ~4 min
Hotel La Quinta Inn & Suites 0.24 mi ~5 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
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 Student in an Organized Health Care Education/Training Program covers
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care. NUCC Health Care Provider Taxonomy, code 390200000X
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 | 1003663964 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 30, 2024 |
| Last updated | Aug 30, 2024 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | MD |
| Practice address |
2810 W. EXPRESSWAY 83 Mercedes, TX 78570 (956) 296-1831 Fax (956) 296-2970 |
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 | 6 | 6 | 3 | 9 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 3 | 6 | 6 | 9 | 3 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
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.