Ana Castillo, BA
Ana Castillo, BA is a Psychologist in Oakland, CA, registered under NPI 1003597121. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Oakland, based on OpenStreetMap data collected Sep 13, 2026. Parking is available about 320 ft away. The nearest transit stop is 250 ft away, served by Fruitvale BART. If you arrive early, there is a coffee shop 0.31 mi away.
Getting here and what is nearby
Restaurant Subway 126 ft ~1 min
3301 East 12th Street, Oakland 94601
Mo-Fr 08:00-19:00; Sa 09:00-18:00
Transit Fruitvale BART 218 ft ~1 min
Transit Fruitvale BART 227 ft ~1 min
Restaurant Wahpepah's Kitchen 237 ft ~1 min
Transit Fruitvale BART 250 ft ~1 min
Parking Fruitvale BART Parking 250 ft ~1 min
Restaurant Taqueria El Zocalo 256 ft ~1 min
1243 33rd Avenue, Oakland
Coffee Powderface 337 ft ~2 min
Parking 299 ft ~2 min
Parking 320 ft ~2 min
Coffee Stars & Stripes Cafe 398 ft ~2 min
Convenience K-Market 435 ft ~2 min
Convenience New Ocean Food Mart 504 ft ~2 min
Gas station Tony Star Gas 985 ft ~4 min
Grocery El Charro Supermarket 0.20 mi ~4 min
Convenience Shell 0.28 mi ~6 min
3750;3758 International Boulevard
Gas station Shell 0.28 mi ~6 min
Grocery FoodMaxx 0.29 mi ~6 min
Coffee Starbucks 0.31 mi ~7 min
3060 East 9th Street, Oakland 94601
Mo-Fr 04:30-22:00; Sa 05:00-22:00; Su 05:30-21:30
Gas station Shell 0.46 mi ~10 min
Grocery Smart & Final Extra! 0.48 mi ~10 min
4117 International Boulevard
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 Psychologist covers
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public. NUCC Health Care Provider Taxonomy, code 103T00000X
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 | |
|---|---|---|---|---|
| 103T00000X | Psychologist | — | — | primary |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — |
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 | 1003597121 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 31, 2023 |
| Last updated | Jun 5, 2024 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | BA |
| Practice address |
3301 E 12TH ST STE 259 Oakland, CA 94601 (510) 269-9030 |
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 | 9 | 7 | 1 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 9 | 5 | 1 | 4 |
Sum = 49 · next multiple of 10 = 50 · check digit = 1 · actual last digit = 1
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.