GONZALO A DIAZ
GONZALO A DIAZ is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1326261249, based in El Paso, TX. The organization lists 2 taxonomy classifications, with Sleep Medicine (Internal Medicine) Physician recorded as primary.
Getting there
The practice address on file is 4305 N MESA ST STE B, El Paso, TX 79902. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| G4109 | TX | Sleep Medicine (Internal Medicine)… primary |
| G4109 | TX | Pulmonary Disease Physician |
This provider holds licence G4109 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
- Part B Supplier - Clinic/group Practice
- PAC ID
- 5597927780
Medicare enrolment is recorded as approved under the provider type Part B Supplier - Clinic/group Practice. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Sleep Medicine covers
An Internist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders. NUCC Health Care Provider Taxonomy, code 207RS0012X
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 | |
|---|---|---|---|---|
| 207RS0012X | Sleep Medicine (Internal Medicine) Physician Sleep Medicine | G4109 | TX | primary |
| 207RP1001X | Pulmonary Disease Physician Pulmonary Disease | G4109 | 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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1326261249 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Apr 10, 2007 |
| Last updated | Mar 19, 2026 |
| Status | Active |
| Practice address |
4305 N MESA ST STE B El Paso, TX 79902 (915) 779-7378 Fax (915) 779-2822 |
| Mailing address |
1016 QUINTA ANTIGUA LN El Paso, TX 79912 |
| Other identifiers |
138134507
(TX) 000U9973 (NM) 79570054 (NM) 138134508 (TX) |
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 | 3 | 2 | 6 | 2 | 6 | 1 | 2 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 3 | 4 | 6 | 4 | 6 | 2 | 2 | 8 |
Sum = 61 · next multiple of 10 = 70 · check digit = 9 · actual last digit = 9
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.