DR. ROBERTA CELEST POWELL LCSW, PHD
NPI 1528118577
Psychologist - Cognitive & Behavioral in Livermore, CA

NPI Status: Active since January 11, 2007

Contact Information

3000 LAS POSITAS RD
MEDICINE A
LIVERMORE, CA
ZIP 94551
Phone: (925) 243-2723
Fax: (925) 243-2708

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

Individual
Female
Psychologist
Cognitive & Behavioral

About ROBERTA POWELL

This page provides the complete NPI Profile along with additional information for Roberta Powell, a provider established in Livermore, California with a medical specialization in Psychologist, focusing in cognitive & behavioral . The healthcare provider is registered in the NPI registry with number 1528118577 assigned on January 2007. The practitioner's primary taxonomy code is 103TB0200X with license number LCSW 9544 (CA). The provider is registered as an individual and her NPI record was last updated 19 years ago.

NPI: 1528118577
Provider Name: DR. ROBERTA CELEST POWELL LCSW, PHD
Gender: Female
Entity Type: Individual
Location Address: 3000 LAS POSITAS RD MEDICINE A LIVERMORE, CA 94551
Location Phone: (925) 243-2723
Location Fax: (925) 243-2708
Mailing Address: 3000 LAS POSITAS RD MEDICINE A LIVERMORE, CA 94551
Mailing Phone: (925) 243-2723
Mailing Fax: (925) 243-2708
Is Sole Proprietor?: No
Enumeration Date: 01-11-2007
Last Update Date: 07-08-2007
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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: Psychologist Cognitive & Behavioral
Taxonomy Code: 103TB0200X
Type: Behavioral Health & Social Service Providers
License No.: LCSW 9544
License State: CA
Taxonomy Description: A psychologist who reflects an experimental-clinical approach distinguished by use of principles of human learning and development and theories of cognitive processing to promote meaningful change in maladaptive human behavior and thinking.

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 1528118577, we treat the final digit (7) 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).

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 → 4

Pos 4

Unchanged

Pos 5

Doubled → 2

Pos 6

Unchanged

Pos 7

Doubled → 16 → 1 + 6

Pos 8

Unchanged

Pos 9

Doubled → 14 → 1 + 4

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 2 → 4 1 → 2 8 → 16 → 7 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 4 + 8 + 2 + 1 + 1 + 6 + 5 + 1 + 4 + 24 = 63

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

The next multiple of ten after 63 is 70. The difference is the calculated check digit.

70 - 63 = 7

This NPI is valid

The calculated check digit is 7, which matches the last digit of 1528118577.