ANDREW HOLLER
NPI 1154835635
Counselor - Addiction (Substance Use Disorder) in Fullerton, CA

NPI Status: Active since November 20, 2017

Contact Information

771 W ORANGETHORPE AVE
FULLERTON, CA
ZIP 92832
Phone: (714) 879-0929
Fax: (714) 578-2960

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

Individual
Male
Counselor
Addiction (Substance Use Disorder)

About ANDREW HOLLER

This page provides the complete NPI Profile along with additional information for Andrew Holler, a provider established in Fullerton, California with a medical specialization in Counselor, focusing in addiction (substance use disorder) . The healthcare provider is registered in the NPI registry with number 1154835635 assigned on November 2017. The practitioner's primary taxonomy code is 101YA0400X with license number 10774 (CA). The provider is registered as an individual and his NPI record was last updated 5 years ago.

NPI: 1154835635
Provider Name: ANDREW HOLLER
Gender: Male
Entity Type: Individual
Location Address: 771 W ORANGETHORPE AVE FULLERTON, CA 92832
Location Phone: (714) 879-0929
Location Fax: (714) 578-2960
Mailing Address: 18 ALBA E IRVINE, CA 92620
Mailing Phone: (949) 355-6377
Is Sole Proprietor?: Yes
Enumeration Date: 11-20-2017
Last Update Date: 06-17-2021
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A Substance Abuse or Addiction Counselor like Andrew Holler advices patients who experience alcoholism, drug addiction, eating disorders, mental health issues, or other mental or behavioral problems. Substance Abuse counselors provide treatment and support to help clients recover from addiction or modify problem behaviors. Many counselors incorporate the principles of 12-step programs, such as Alcoholics Anonymous (AA). They educate clients how to cope with stress and life’s issues in ways that help them recover. Counselors also help patients improve their personal relationships and find ways to discuss their addiction or other problems with family and friends.

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: Counselor Addiction (Substance Use Disorder)
Taxonomy Code: 101YA0400X
Type: Behavioral Health & Social Service Providers
License No.: 10774
License State: CA

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 1154835635, we treat the final digit (5) 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 55. The final step is to find the difference between that total and the next multiple of ten (60 - 55 = 5).

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 → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

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 8 → 16 → 7 5 → 10 → 1 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 1 + 0 + 4 + 1 + 6 + 3 + 1 + 0 + 6 + 6 + 24 = 55

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

The next multiple of ten after 55 is 60. The difference is the calculated check digit.

60 - 55 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1154835635.