Alejandra Ayestaran Cassani, MD
Alejandra Ayestaran Cassani, MD is a Pediatrics Physician in San Angelo, TX, registered under NPI 1003121245.
Getting there
Here is what surrounds this office in San Angelo, based on OpenStreetMap data collected Sep 6, 2026. Parking is available about 0.23 mi away.
Getting here and what is nearby
Restaurant Sonic 743 ft ~3 min
3410 Knickerbocker Road, San Angelo 76904
Mo-Th 06:00-24:00; Fr-Sa 06:00-01:00; Su 06:00-24:00
Parking 795 ft ~4 min
Restaurant Burger King 817 ft ~4 min
3333 Knickerbocker Road, San Angelo 76904-6812
Mo-Th 06:00-22:00; Fr-Sa 06:00-23:00; Su 07:00-22:00
Parking 0.22 mi ~5 min
Parking 0.23 mi ~5 min
Restaurant PV Deli by Chef Jason 0.28 mi ~6 min
2561 Sunset Drive, San Angelo 76904
Mo-Fr 10:30-14:30; Sa 11:00-14:30
Convenience Stripes 0.39 mi ~8 min
Gas station Stripes 0.39 mi ~8 min
Gas station Sunoco 0.45 mi ~9 min
Hotel Rodeway Inn 0.45 mi ~9 min
Convenience Stripes 0.46 mi ~10 min
2701 Sunset Drive, San Angelo 76904
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 |
|---|---|---|
| N7213 | TX | Pediatrics Physician primary |
This provider holds licence N7213 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 - Pediatric Medicine
- PAC ID
- 7517152457
- Enrollment ID
- I20101117000594
Medicare enrolment is recorded as approved under the provider type Practitioner - Pediatric Medicine. 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 Pediatrics covers
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development. NUCC Health Care Provider Taxonomy, code 208000000X
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 | 1003121245 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 12, 2010 |
| Last updated | Oct 31, 2011 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | MD |
| Practice address |
2141 HAMILTON WAY STE 100 San Angelo, TX 76904 (325) 245-4301 Fax (325) 245-4034 |
| Other identifiers |
283015001
· Medicaid (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 | 0 | 0 | 3 | 1 | 2 | 1 | 2 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 2 | 2 | 2 | 8 |
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.