Yeni Guevara, 101YA0400X
Yeni Guevara, 101YA0400X is an Addiction (Substance Use Disorder) Counselor in Pico Rivera, CA, registered under NPI 1003455247. 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 Pico Rivera, based on OpenStreetMap data collected Sep 28, 2026. No dedicated parking is recorded within walking distance, so allow extra time to find street parking. The nearest transit stop is 492 ft away, served by Metro. A pharmacy sits 490 ft from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.25 mi away.
Getting here and what is nearby
Restaurant Dal-Rae 172 ft ~1 min
Restaurant Jack in the Box 193 ft ~1 min
Transit Rosemead & Washington 277 ft ~2 min
Transit Montebello 421 ft ~2 min
Transit Metro 492 ft ~2 min
Pharmacy Walgreens 490 ft ~2 min
Restaurant Wingstop 605 ft ~3 min
Grocery ALDI 748 ft ~3 min
8950 Washington Boulevard, Pico Rivera 90605
Mo, We, Fr-Su 09:00-21:00; Tu, Th 08:30-21:00
Coffee Ding Tea 0.23 mi ~5 min
Coffee Starbucks 0.25 mi ~5 min
Hotel Americas Best Value Inn Pico Rivera Los Angeles E 0.26 mi ~6 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 Addiction (Substance Use Disorder) covers
Definition to come... NUCC Health Care Provider Taxonomy, code 101YA0400X
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 | 1003455247 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 6, 2020 |
| Last updated | Jan 6, 2020 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | 101YA0400X |
| Practice address |
9033 WASHINGTON BLVD Pico Rivera, CA 90660 (562) 942-9625 Fax (562) 942-9695 |
| Other names |
Yeni Castro Former Legal Business Name |
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 | 5 | 5 | 2 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 5 | 1 | 2 | 8 |
Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7
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.