WILLIAM KERN DESCHNER MD PA GASTROENTEROLOGY OF SAN MARCOS
NPI 1851506034
Specialist in San Marcos, TX

Q: What is the provider's specialty?

The provider's specialty is Specialist with taxonomy code 174400000X.

NPI Status: Active since May 11, 2007

Contact Information

1305 WONDER WORLD DR
SUITE 200
SAN MARCOS, TX
ZIP 78666
Phone: (512) 754-8676
Fax: (512) 754-8680

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Table of Contents

NPI Profile Information
Primary Taxonomy
Group Taxonomy
Authorized Official
CLIA Information
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Organization
Specialist
CLIA Number: 45D0712133
CLIA Cert. Type: Physician Office
CLIA Exp. Date: 08-02-2026

About WILLIAM KERN DESCHNER MD PA GASTROENTEROLOGY OF SAN MARCOS

This page provides the complete NPI Profile along with additional information for William Kern Deschner Md Pa Gastroenterology Of San Marcos, a provider established in San Marcos, Texas operating as a Specialist. The healthcare provider is registered in the NPI registry with number 1851506034 assigned on May 2007. The practitioner's primary taxonomy code is 174400000X. The provider is registered as an organization and their NPI record was last updated 16 years ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Dr. Edward F. Coles M.d. (Administrator)

NPI: 1851506034
Provider Name: WILLIAM KERN DESCHNER MD PA GASTROENTEROLOGY OF SAN MARCOS
Entity Type: Organization
Location Address: 1305 WONDER WORLD DR SUITE 200 SAN MARCOS, TX 78666
Location Phone: (512) 754-8676
Location Fax: (512) 754-8680
Mailing Address: 1305 WONDER WORLD DR SUITE 200 SAN MARCOS, TX 78666
Mailing Phone: (512) 754-8676
Mailing Fax: (512) 754-8680
Is Sole Proprietor?: No
Is Organization Subpart?: No
Enumeration Date: 05-11-2007
Last Update Date: 01-05-2011
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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
Taxonomy Code: 174400000X
Type: Other Service Providers
Taxonomy Description: An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name: DR. EDWARD F. COLES M.D.
Authorized Official Title: ADMINISTRATOR
Authorized Official Phone: (512) 754-8676

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number: 45D0712133
Facility Type: Physician Office
Certificate Effective Date: August 03, 2024
Certificate Expiration Date: August 02, 2026
Laboratory Director: WILLIAM R. ROGERS DO
Certificate Type: Certificate of Waiver
Certificate Type Description: This CLIA certificate is issued to William Kern Deschner Md Pa Gastroenterology Of San Marcos to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.

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 1851506034, we treat the final digit (4) 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 46. The final step is to find the difference between that total and the next multiple of ten (50 - 46 = 4).

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 → 10 → 1 + 0

Pos 4

Unchanged

Pos 5

Doubled → 10 → 1 + 0

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

Pos 8

Unchanged

Pos 9

Doubled → 6

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 5 → 10 → 1 5 → 10 → 1 6 → 12 → 3 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 1 + 0 + 1 + 1 + 0 + 0 + 1 + 2 + 0 + 6 + 24 = 46

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

The next multiple of ten after 46 is 50. The difference is the calculated check digit.

50 - 46 = 4

This NPI is valid

The calculated check digit is 4, which matches the last digit of 1851506034.