Fritzie Castro
Fritzie Castro is a Pediatric Occupational Therapist in Fullerton, CA, registered under NPI 1003103524.
Getting there
Here is what surrounds this office in Fullerton, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 0.37 mi away. There is EV charging 0.26 mi from the office (Volta) — useful if you are driving in from out of town. The nearest transit stop is 698 ft away, served by Orangethorpe-Harbor. A pharmacy sits 628 ft from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.20 mi away.
Getting here and what is nearby
Parking 119 ft ~1 min
Restaurant Burger King 106 ft ~1 min
1329 South Harbor Boulevard, Fullerton 92832-3001
Mo-Fr 06:30-22:00; Sa-Su 07:30-22:00
Parking 144 ft ~1 min
Restaurant J SAN RAMEN 284 ft ~2 min
1309 South Harbor Boulevard, Fullerton 92832
Transit Harbor-Orangethorpe 359 ft ~2 min
EV charging Tesla Supercharger 513 ft ~2 min
Restaurant KFC 517 ft ~2 min
Transit Harbor-Orangefair 582 ft ~3 min
Coffee Klatch Coffee 585 ft ~3 min
Pharmacy CVS Pharmacy 628 ft ~3 min
Grocery Sprouts Farmers Market 642 ft ~3 min
1447 South Harbor Boulevard, Fullerton 92832
Mo-Su 07:00-22:00
Transit Orangethorpe-Harbor 698 ft ~3 min
Coffee Starbucks 0.20 mi ~4 min
Coffee The Coffee Bean & Tea Leaf 0.20 mi ~4 min
Gas station Shell 0.20 mi ~5 min
EV charging Tesla Supercharger 0.22 mi ~5 min
Hotel Holiday Inn Express 0.23 mi ~5 min
222 West Houston Avenue, Fullerton 92832
EV charging Volta 0.26 mi ~6 min
Grocery Amazon Fresh 0.26 mi ~6 min
1100 Harbor Boulevard, Fullerton 92832
Gas station Costco Gasoline 0.32 mi ~7 min
Parking 0.37 mi ~8 min
07:00-22:00
Grocery Walmart Supercenter 0.37 mi ~8 min
88 East Orangethorpe Avenue, Anaheim 92801
Mo-Su 07:00-23:00
Gas station World 0.48 mi ~10 min
Convenience World Express 0.49 mi ~10 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 Pediatrics covers
Occupational therapists provide services to infants, toddlers and children who have or who are at risk for developmental delays or disabilities. Occupational therapy is concerned with a child's ability to participate in daily life activities or "occupations." Occupational therapists use their unique expertise to help children with social-emotional, physical, cognitive, communication, and adaptive behavioral challenges and to help children to be prepared for and perform important learning and school-related activities and to fulfill their rule as students. Through an understanding of the impact of disability, illness, and impairment on a child's development, plan, ability to learn new skills, and overall occupational performance, occupational therapists design interventions that promote healthy development, establish needed skills, and/or modify environments, all in support of participation in daily activities. NUCC Health Care Provider Taxonomy, code 225XP0200X
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 | 1003103524 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 5, 2011 |
| Last updated | Jul 5, 2011 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Practice address |
233 ORANGEFAIR MALL Fullerton, CA 92832 (714) 870-6116 Fax (714) 870-9038 |
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 | 0 | 3 | 5 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 0 | 6 | 5 | 4 |
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.