Maria Castillo, N.P.
Maria Castillo, N.P. is an Obstetrics & Gynecology Nurse Practitioner in Los Angeles, CA, registered under NPI 1003051954.
Getting there
Here is what surrounds this office in Los Angeles, based on OpenStreetMap data collected Sep 2, 2026. Parking is available about 0.24 mi away. The nearest transit stop is 0.22 mi away, served by 1st & Fresno. If you arrive early, there is a coffee shop 0.40 mi away.
Getting here and what is nearby
Transit 1st & Evergreen 59 ft ~1 min
Transit 1st & Evergreen 102 ft ~1 min
Restaurant Subway 816 ft ~4 min
2800 East First Street, Boyle Heights 90033
08:30-21:30
Parking 823 ft ~4 min
Grocery Food 4 Less 1,025 ft ~4 min
Transit 1st & Fresno 0.22 mi ~5 min
Parking 0.23 mi ~5 min
Parking 0.24 mi ~5 min
Gas station Arco 0.26 mi ~6 min
Gas station Arco 0.27 mi ~6 min
Restaurant Brooklyn Ave Pizza Co 0.33 mi ~7 min
2706 East Cesar E Chavez Avenue, Los Angeles 90033
Fr-Su 11:00-23:00,Tu-Th 11:00-22:00
Convenience Sakura Market 0.35 mi ~7 min
Restaurant Jack in the Box 0.35 mi ~8 min
2701 East Cesar East Chavez Avenue, Los Angeles 90033
Coffee Acurrúcame Café 0.40 mi ~8 min
2609 East Cesar E Chavez Avenue, 90033
Mo-Sa 07:00-18:00
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 |
|---|---|---|
| RN403433 | CA | Obstetrics & Gynecology Nurse Practitioner primary |
This provider holds licence RN403433 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 Obstetrics & Gynecology covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LX0001X
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 | 1003051954 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 6, 2008 |
| Last updated | Jan 18, 2024 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | N.P. |
| Practice address |
3000 E 1ST ST Los Angeles, CA 90063 (323) 262-6935 Fax (323) 262-3109 |
| Mailing address |
9723 MAXINE ST Pico Rivera, CA 90660 |
| Other names |
Maria Castillo Other Name |
| Other identifiers |
RN403433
· Medicaid (CA) |
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 | 0 | 5 | 1 | 9 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 5 | 2 | 9 | 1 |
Sum = 46 · next multiple of 10 = 50 · 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.