Gelbert De Guzman, OTA
Gelbert De Guzman, OTA is an Occupational Therapy Assistant in Encino, CA, registered under NPI 1003452863. 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 Encino, based on OpenStreetMap data collected Sep 27, 2026. Parking is available about 0.25 mi away. The nearest transit stop is 0.20 mi away, served by Ventura / Woodley. If you arrive early, there is a coffee shop 0.39 mi away.
Getting here and what is nearby
Transit Ventura / Libbit 92 ft ~1 min
Transit Ventura / Libbit 326 ft ~2 min
Restaurant Jersey Mike's Subs 552 ft ~3 min
Grocery Amazon Fresh 693 ft ~3 min
Restaurant California Pizza Kitchen 960 ft ~4 min
Parking 996 ft ~4 min
Transit Ventura / Woodley 0.20 mi ~5 min
Parking 0.21 mi ~5 min
Coffee Starbucks 0.24 mi ~5 min
Grocery Gelson's 0.24 mi ~5 min
Parking 0.25 mi ~5 min
Coffee Aurora Coffee & Creamery 0.39 mi ~8 min
Restaurant Panera Bread 0.46 mi ~10 min
16624 Ventura Boulevard, Encino 91436
Mo-Fr 06:00-21:00; Sa 07:00-21:00; Su 07:00-20:00
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 |
|---|---|---|
| 3353 | CA | Occupational Therapy Assistant primary |
This provider holds licence 3353 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 Occupational Therapy Assistant covers
An occupational therapy assistant is a person who has graduated from an occupational therapy assistant program accredited by the Accreditation Council for Occupational Therapy Education (ACOTE) or predecessor organizations, has successfully completed a period of supervised fieldwork experience required by the accredited occupational therapy assistant program, has passed a nationally recognized entry-level examination for occupational therapy assistants, and fulfills state requirements for licensure, certification, or registration. An occupational therapy assistant provides interventions under the supervision of an occupational therapist which emphasize the therapeutic use of everyday life activities (i.e., occupations) with individuals or groups for the purpose of facilitating participation in roles and situations and in home, school, workplace, community and other settings. Occupational therapy services are provided for the purpose of promoting health and wellness and are provided to those who have or are at risk for developing an illness, injury, disease, disorder, condition, impairment, disability, activity limitation, or participation restriction. Occupational therapy assistants address the physical, cognitive, psychosocial, sensory, and other aspects of occupational performance in a variety of contexts to support engagement in everyday life activities that affect health, well-being, and quality of life. NUCC Health Care Provider Taxonomy, code 224Z00000X
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 | 1003452863 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 26, 2019 |
| Last updated | Apr 14, 2020 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | OTA |
| Practice address |
16260 VENTURA BLVD Encino, CA 91436 (818) 986-1977 |
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 | 2 | 8 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 5 | 4 | 8 | 3 |
Sum = 57 · next multiple of 10 = 60 · 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.