WILLIAM GERARDO OLIVARES
NPI 1114316916
Specialist/Technologist - Speech-Language Assistant in Phoenix, AZ

Q: What is the provider's specialty?

The provider's specialty is Specialist/Technologist with taxonomy code 2355S0801X and a focus in Speech-Language Assistant.

NPI Status: Active since January 16, 2015

Contact Information

6306 N 7TH ST
PHOENIX, AZ
ZIP 85014
Phone: (602) 279-5801

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NPPES record last updated: January 16, 2015. Verified against the NPPES registry weekly; last sync: July 12, 2026.

Table of Contents

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

Individual
Male
Specialist/Technologist
Speech-Language Assistant

About WILLIAM OLIVARES

This page provides the complete NPI Profile along with additional information for William Olivares, a provider established in Phoenix, Arizona with a medical specialization in Specialist/technologist, focusing in speech-language assistant . The healthcare provider is registered in the NPI registry with number 1114316916 assigned on January 2015. The practitioner's primary taxonomy code is 2355S0801X with license number SLPA9239 (AZ). The provider is registered as an individual and his NPI record was last updated 12 years ago.

NPI: 1114316916
Provider Name: WILLIAM GERARDO OLIVARES
Gender: Male
Entity Type: Individual
Location Address: 6306 N 7TH ST PHOENIX, AZ 85014
Location Phone: (602) 279-5801
Mailing Address: 5131 N 40TH ST APT A210 PHOENIX, AZ 85018
Mailing Phone: (520) 429-7123
Is Sole Proprietor?: Yes
Enumeration Date: 01-16-2015
Last Update Date: 01-16-2015
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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.: SLPA9239
License State: AZ

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 1114316916, we treat the final digit (6) 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 6).

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 → 2

Pos 4

Unchanged

Pos 5

Doubled → 6

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

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 1 → 2 3 → 6 6 → 12 → 3 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 2 + 4 + 6 + 1 + 1 + 2 + 9 + 2 + 24 = 54

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

The next multiple of ten after 54 is 60. The difference is the calculated check digit.

60 - 54 = 6

This NPI is valid

The calculated check digit is 6, which matches the last digit of 1114316916.