ERIN HANNAH CHUNG
NPI 1003765082
Occupational Therapist in Diamond Bar, CA
NPI Status: Active since January 23, 2026
Contact Information
3220 S BREA CANYON RD STE E
DIAMOND BAR, CA
ZIP 91765
Phone: (909) 258-9292
- Individual
- Occupational Therapist
About ERIN CHUNG
This page provides the complete NPI Profile along with additional information for Erin Chung, a provider established in Diamond Bar, California operating as a Occupational Therapist. The healthcare provider is registered in the NPI registry with number 1003765082 assigned on January 2026. The practitioner's primary taxonomy code is 225X00000X with license number 28685 (CA). The provider is registered as an individual and their NPI record was last updated January 2026.
- NPI
- 1003765082
- Provider Name
- ERIN HANNAH CHUNG
- Gender
- Entity Type
- Individual
- Location Address
- 3220 S BREA CANYON RD STE E DIAMOND BAR, CA 91765
- Location Phone
- (909) 258-9292
- Mailing Address
- 805 CHARLESTON WAY BREA, CA 92821
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 01-23-2026
- Last Update Date
- 01-23-2026
- Code Navigator
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Occupational Therapist
- Taxonomy Code
- 225X00000X
- Type
- Respiratory, Developmental, Rehabilitative and Restorative Service Providers
- License No.
- 28685
- License State
- CA
- Taxonomy Description
- An occupational therapist is a person who has graduated from an entry-level occupational therapy program accredited by the Accreditation Council for Occupational Therapy Education (ACOTE) or predecessor organizations, or approved by the World Federation of Occupational Therapists (WFOT), or an equivalent international occupational therapy education program; has successfully completed a period of supervised fieldwork experience required by the occupational therapy program; has passed a nationally recognized entry-level examination for occupational therapists, and fulfills state requirements for licensure, certification, or registration. An occupational therapist provides interventions based on evaluation and 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 therapists 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.
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1003765082, we treat the final digit (2) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 48. The final step is to find the difference between that total and the next multiple of ten (50 - 48 = 2).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 48 is 50. The difference is the calculated check digit.
Other Providers at the Same Location
The following 2 providers are registered at the same or a nearby location.
DIAMOND BAR, CA 91765
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1003765082, enumerated as an "individual" on January 23, 2026.
The provider is located at 3220 S BREA CANYON RD STE E DIAMOND BAR, CA 91765 and the phone number is (909) 258-9292.
Occupational Therapist with taxonomy code 225X00000X.
