Clarissa Ortega, SUDRC
Clarissa Ortega, SUDRC is an Addiction (Substance Use Disorder) Counselor in San Leandro, CA, registered under NPI 1003543653.
Getting there
Here is what surrounds this office in San Leandro, based on OpenStreetMap data collected Oct 4, 2026. Parking is available about 601 ft away. There is EV charging 757 ft from the office — useful if you are driving in from out of town. The nearest transit stop is 351 ft away, served by Fairmont Drive & East 14th Street. If you arrive early, there is a coffee shop 111 ft away.
Getting here and what is nearby
Coffee Starbucks 111 ft ~1 min
Transit East 14th Street & Fairmont Drive 233 ft ~1 min
Transit East 14th Street & 153rd Avenue 316 ft ~2 min
Transit Fairmont Drive & East 14th Street 351 ft ~2 min
EV charging 372 ft ~2 min
Convenience 7-Eleven 384 ft ~2 min
15350 East 14th Street, San Leandro 94578
Parking 344 ft ~2 min
Parking 404 ft ~2 min
EV charging 506 ft ~2 min
Parking 601 ft ~3 min
EV charging 757 ft ~3 min
Grocery Lucky 803 ft ~4 min
15070 Hesperian Boulevard, San Leandro 94578
Restaurant Cinco Taco Bar 958 ft ~4 min
15100 Hesperian Boulevard, 94578
Restaurant Burger King 1,011 ft ~4 min
15050 East 14th Street, San Leandro 94578
07:00-21:00
Restaurant Istanbul Kitchen 0.20 mi ~4 min
Gas station Exxon 0.23 mi ~5 min
Gas station Bayfair Gas & Mart 0.23 mi ~5 min
Convenience 7-Eleven 0.24 mi ~5 min
Gas station Arco 0.29 mi ~6 min
15135 Hesperian Boulevard, San Leandro 94578
Grocery Mi Rancho Supermarket 0.35 mi ~7 min
15850 East 14th Street, San Leandro 94578
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 |
|---|---|---|
| 13468 | CA | Addiction (Substance Use Disorder)… primary |
This provider holds licence 13468 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
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 | 1003543653 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 3, 2022 |
| Last updated | Aug 3, 2022 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | SUDRC |
| Practice address |
2035 FAIRMONT DR San Leandro, CA 94578 (510) 346-3836 |
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 | 5 | 4 | 3 | 6 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 4 | 6 | 6 | 1 |
Sum = 47 · next multiple of 10 = 50 · check digit = 3 · actual last digit = 3
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.