JOAN PETRILLI FERRARI OTR/L, CHT
NPI 1841700549
Occupational Therapist - Hand in Fremont, CA

NPI Status: Active since October 07, 2017

Contact Information

39180 FARWELL DR STE 211
FREMONT, CA
ZIP 94538
Phone: (510) 857-1000
Fax: (510) 857-1001

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

Individual
Female
Occupational Therapist
Hand

About JOAN FERRARI

This page provides the complete NPI Profile along with additional information for Joan Ferrari, a provider established in Fremont, California with a medical specialization in Occupational Therapist, focusing in hand . The healthcare provider is registered in the NPI registry with number 1841700549 assigned on October 2017. The practitioner's primary taxonomy code is 225XH1200X with license number 7406 (CA). The provider is registered as an individual and her NPI record was last updated 9 years ago.

NPI: 1841700549
Provider Name: JOAN PETRILLI FERRARI OTR/L, CHT
Other Name: JOAN MARIE PETRILLI OTR
Other Name Type: Former Name (1)
Gender: Female
Entity Type: Individual
Location Address: 39180 FARWELL DR STE 211 FREMONT, CA 94538
Location Phone: (510) 857-1000
Location Fax: (510) 857-1001
Mailing Address: 2328 WESTMORELAND DR SAN JOSE, CA 95124
Mailing Phone: (408) 930-9779
Is Sole Proprietor?: No
Enumeration Date: 10-07-2017
Last Update Date: 10-07-2017
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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 Hand
Taxonomy Code: 225XH1200X
Type: Respiratory, Developmental, Rehabilitative and Restorative Service Providers
License No.: 7406
License State: CA

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 1841700549, we treat the final digit (9) 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 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).

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 → 8

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 8

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 4 → 8 7 → 14 → 5 0 → 0 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 8 + 1 + 1 + 4 + 0 + 0 + 5 + 8 + 24 = 61

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

The next multiple of ten after 61 is 70. The difference is the calculated check digit.

70 - 61 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1841700549.