GARY COLLINS
NPI 1487530762
Rehabilitation Practitioner in Concord, CA

NPI Status: Active since August 13, 2025

Contact Information

1936 CARLOTTA DR
CONCORD, CA
ZIP 94519
Phone: (925) 682-8000
Fax: (925) 682-8000

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

Individual
Male
Rehabilitation Practitioner

About GARY COLLINS

This page provides the complete NPI Profile along with additional information for Gary Collins, a provider established in Concord, California with a medical specialization in Rehabilitation Practitioner. The healthcare provider is registered in the NPI registry with number 1487530762 assigned on August 2025. The practitioner's primary taxonomy code is 225400000X. The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1487530762
Provider Name: GARY COLLINS
Gender: Male
Entity Type: Individual
Location Address: 1936 CARLOTTA DR CONCORD, CA 94519
Location Phone: (925) 682-8000
Location Fax: (925) 682-8000
Mailing Address: 1936 CARLOTTA DR CONCORD, CA 94519
Mailing Fax: (925) 682-8000
Is Sole Proprietor?: No
Enumeration Date: 08-13-2025
Last Update Date: 08-13-2025
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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: Rehabilitation Practitioner
Taxonomy Code: 225400000X
Type: Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Description: A health care practitioner who trains or retrains individuals disabled by disease or injury to help them attain their maximum functional capacity.

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 1487530762, we treat the final digit (2) 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 58. The final step is to find the difference between that total and the next multiple of ten (60 - 58 = 2).

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 → 10 → 1 + 0

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 12 → 1 + 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 8 → 16 → 7 5 → 10 → 1 0 → 0 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 1 + 6 + 7 + 1 + 0 + 3 + 0 + 7 + 1 + 2 + 24 = 58

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

The next multiple of ten after 58 is 60. The difference is the calculated check digit.

60 - 58 = 2

This NPI is valid

The calculated check digit is 2, which matches the last digit of 1487530762.