MARVIN MATTHEW WALKER JR. LSA
NPI 1609260348
Physician Assistant - Surgical in Rowlett, TX

NPI Status: Active since March 19, 2015

Contact Information

1901 MILLER RD
ROWLETT, TX
ZIP 75088
Phone: (214) 227-2457
Fax: (214) 746-0880

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

Individual
Male
Physician Assistant
Surgical

About MARVIN WALKER

This page provides the complete NPI Profile along with additional information for Marvin Walker, a provider established in Rowlett, Texas with a medical specialization in Physician Assistant, focusing in surgical . The healthcare provider is registered in the NPI registry with number 1609260348 assigned on March 2015. The practitioner's primary taxonomy code is 363AS0400X. The provider is registered as an individual and his NPI record was last updated 7 years ago.

NPI: 1609260348
Provider Name: MARVIN MATTHEW WALKER JR. LSA
Gender: Male
Entity Type: Individual
Location Address: 1901 MILLER RD ROWLETT, TX 75088
Location Phone: (214) 227-2457
Location Fax: (214) 746-0880
Mailing Address: PO BOX 938 ROWLETT, TX 75030
Mailing Phone: (214) 227-2457
Mailing Fax: (214) 746-0880
Is Sole Proprietor?: Yes
Enumeration Date: 03-19-2015
Last Update Date: 04-24-2019
Code Navigator

Location Map

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: Physician Assistant Surgical
Taxonomy Code: 363AS0400X
Type: Physician Assistants & Advanced Practice Nursing Providers

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 1609260348, 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 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 → 0

Pos 4

Unchanged

Pos 5

Doubled → 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 0 → 0 2 → 4 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 + 6 + 0 + 9 + 4 + 6 + 0 + 3 + 8 + 24 = 62

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

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1609260348.