RACHEL WILLIAMS SLPA
NPI 1104403211
Specialist/Technologist - Speech-Language Assistant in Rocklin, CA

NPI Status: Active since March 25, 2021

Contact Information

6508 LONETREE BLVD STE 104
ROCKLIN, CA
ZIP 95765
Phone: (510) 759-7829

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

Individual
Female
Specialist/Technologist
Speech-Language Assistant

About RACHEL WILLIAMS

This page provides the complete NPI Profile along with additional information for Rachel Williams, a provider established in Rocklin, California with a medical specialization in Specialist/technologist, focusing in speech-language assistant . The healthcare provider is registered in the NPI registry with number 1104403211 assigned on March 2021. The practitioner's primary taxonomy code is 2355S0801X with license number 5492 (CA). The provider is registered as an individual and her NPI record was last updated 5 years ago.

NPI: 1104403211
Provider Name: RACHEL WILLIAMS SLPA
Gender: Female
Entity Type: Individual
Location Address: 6508 LONETREE BLVD STE 104 ROCKLIN, CA 95765
Location Phone: (510) 759-7829
Mailing Address: 6508 LONETREE BLVD STE 104 ROCKLIN, CA 95765
Mailing Phone: (510) 759-7829
Is Sole Proprietor?: No
Enumeration Date: 03-25-2021
Last Update Date: 03-25-2021
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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: Specialist/Technologist Speech-Language Assistant
Taxonomy Code: 2355S0801X
Type: Speech, Language and Hearing Service Providers
License No.: 5492
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 1104403211, we treat the final digit (1) 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 49. The final step is to find the difference between that total and the next multiple of ten (50 - 49 = 1).

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 → 0

Pos 4

Unchanged

Pos 5

Doubled → 8

Pos 6

Unchanged

Pos 7

Doubled → 6

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 0 → 0 4 → 8 3 → 6 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 0 + 4 + 8 + 0 + 6 + 2 + 2 + 24 = 49

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

The next multiple of ten after 49 is 50. The difference is the calculated check digit.

50 - 49 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1104403211.