MR. GARY P WILLIAMS RT R CT
NPI 1689659948
Radiologic Technologist - Radiography in Shiprock, NM

NPI Status: Active since December 09, 2005

Contact Information

US HWY 491 NORTH
SHIPROCK, NM
ZIP 87420
Phone: (505) 368-6020
Fax: (505) 368-6431

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

Individual
Male
Radiologic Technologist
Radiography

About GARY WILLIAMS

This page provides the complete NPI Profile along with additional information for Gary Williams, a provider established in Shiprock, New Mexico with a medical specialization in Radiologic Technologist, focusing in radiography . The healthcare provider is registered in the NPI registry with number 1689659948 assigned on December 2005. The practitioner's primary taxonomy code is 2471C3402X with license number 314927 (NM). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1689659948
Provider Name: MR. GARY P WILLIAMS RT R CT
Gender: Male
Entity Type: Individual
Location Address: US HWY 491 NORTH SHIPROCK, NM 87420
Location Phone: (505) 368-6020
Location Fax: (505) 368-6431
Mailing Address: PO BOX 160 SHIPROCK, NM 87420
Mailing Phone: (505) 368-6020
Mailing Fax: (505) 368-6431
Is Sole Proprietor?: Yes
Enumeration Date: 12-09-2005
Last Update Date: 09-11-2025
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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: Radiologic Technologist Radiography
Taxonomy Code: 2471C3402X
Type: Technologists, Technicians & Other Technical Service Providers
License No.: 314927
License State: NM
Taxonomy Description: A radiologic technologist who specializes in radiography (also known as x-rays) and is appropriately educated and trained, consistent with nationally recognized standards, state statute, and facility policy in performance of radiographs, exam techniques, equipment protocols, radiation safety, and patient care.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No.	Taxonomy Code	Type	Classification / Specialization	License No. (State)
1	2471C3401X	Technologists, Technicians & Other Technical Service Providers	Radiologic Technologist Computed Tomography	314927 (NM)

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 1689659948, we treat the final digit (8) 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 82. The final step is to find the difference between that total and the next multiple of ten (90 - 82 = 8).

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 → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

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 8 → 16 → 7 6 → 12 → 3 9 → 18 → 9 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 6 + 9 + 1 + 2 + 5 + 1 + 8 + 9 + 8 + 24 = 82

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

The next multiple of ten after 82 is 90. The difference is the calculated check digit.

90 - 82 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1689659948.