DR. SYDNEY HOFF OTD, OTR/L
NPI 1154870517
Occupational Therapist - Mental Health in San Mateo, CA

NPI Status: Active since September 27, 2016

Contact Information

1108 S EL CAMINO REAL
SAN MATEO, CA
ZIP 94402
Phone: (650) 458-0026
Fax: (650) 458-0027

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Occupational Therapist
Mental Health

About SYDNEY HOFF

This page provides the complete NPI Profile along with additional information for Sydney Hoff, a provider established in San Mateo, California with a medical specialization in Occupational Therapist, focusing in mental health . The healthcare provider is registered in the NPI registry with number 1154870517 assigned on September 2016. The practitioner's primary taxonomy code is 225XM0800X with license number 15719 (CA). The provider is registered as an individual and her NPI record was last updated 5 years ago.

NPI: 1154870517
Provider Name: DR. SYDNEY HOFF OTD, OTR/L
Other Name: DR. SYDNEY LESHIN OTD, OTR/L
Other Name Type: Former Name (1)
Gender: Female
Entity Type: Individual
Location Address: 1108 S EL CAMINO REAL SAN MATEO, CA 94402
Location Phone: (650) 458-0026
Location Fax: (650) 458-0027
Mailing Address: 444 SARATOGA AVE APT 17G SANTA CLARA, CA 95050
Mailing Phone: (714) 381-8010
Is Sole Proprietor?: No
Enumeration Date: 09-27-2016
Last Update Date: 04-20-2021
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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 Mental Health
Taxonomy Code: 225XM0800X
Type: Respiratory, Developmental, Rehabilitative and Restorative Service Providers
License No.: 15719
License State: CA
Taxonomy Description: Occupational therapists provide treatment for people recovering from a mental or physical illness to regain their independence and stability and to engage in normal daily occupations (work, home, family life, school, leisure). Occupational therapists provide particular emphasis on interventions that result in improved quality of life and decrease hospitalization.

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 1154870517, we treat the final digit (7) 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 53. The final step is to find the difference between that total and the next multiple of ten (60 - 53 = 7).

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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 10 → 1 + 0

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 2

Check

Target digit

Regular digit Doubled digit Check digit

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.

1 → 2 5 → 10 → 1 8 → 16 → 7 0 → 0 1 → 2

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 1 + 1 + 0 + 4 + 1 + 6 + 7 + 0 + 5 + 2 + 24 = 53

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 53 is 60. The difference is the calculated check digit.

60 - 53 = 7

This NPI is valid

The calculated check digit is 7, which matches the last digit of 1154870517.