MR. JOHN HARRIS WALKER
NPI 1689839151
Clinic/Center - Adult Mental Health in Goleta, CA

NPI Status: Active since July 24, 2008

Contact Information

137 AERO CAMINO
GOLETA, CA
ZIP 93117
Phone: (805) 961-9200
Fax: (805) 961-9211

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

Individual
Male
Clinic/Center
Adult Mental Health

About JOHN WALKER

This page provides the complete NPI Profile along with additional information for John Walker, a provider established in Goleta, California with a medical specialization in Clinic/center, focusing in adult mental health . The healthcare provider is registered in the NPI registry with number 1689839151 assigned on July 2008. The practitioner's primary taxonomy code is 261QM0850X. The provider is registered as an individual and his NPI record was last updated 18 years ago.

NPI: 1689839151
Provider Name: MR. JOHN HARRIS WALKER
Gender: Male
Entity Type: Individual
Location Address: 137 AERO CAMINO GOLETA, CA 93117
Location Phone: (805) 961-9200
Location Fax: (805) 961-9211
Mailing Address: 137 AERO CAMINO GOLETA, CA 93117
Mailing Phone: (805) 961-9200
Mailing Fax: (805) 961-9211
Is Sole Proprietor?: Yes
Enumeration Date: 07-24-2008
Last Update Date: 07-24-2008
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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: Clinic/Center Adult Mental Health
Taxonomy Code: 261QM0850X
Type: Ambulatory Health Care Facilities
Taxonomy Description: An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to mental and behavioral disorders in adults.

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 1689839151, 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 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 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 → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 0

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 8 → 16 → 7 9 → 18 → 9 5 → 10 → 1

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 + 6 + 3 + 1 + 8 + 1 + 1 + 0 + 24 = 69

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

The next multiple of ten after 69 is 70. The difference is the calculated check digit.

70 - 69 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1689839151.