LEAH MAREE WILLIS
NPI 1487116752
Counselor - Addiction (Substance Use Disorder) in San Pedro, CA

NPI Status: Active since April 04, 2019

Contact Information

235 W 9TH ST
SAN PEDRO, CA
ZIP 90731
Phone: (310) 521-9209
Fax: (310) 521-9241

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

Individual
Female
Counselor
Addiction (Substance Use Disorder)

About LEAH WILLIS

This page provides the complete NPI Profile along with additional information for Leah Willis, a provider established in San Pedro, California with a medical specialization in Counselor, focusing in addiction (substance use disorder) . The healthcare provider is registered in the NPI registry with number 1487116752 assigned on April 2019. The practitioner's primary taxonomy code is 101YA0400X. The provider is registered as an individual and her NPI record was last updated 7 years ago.

NPI: 1487116752
Provider Name: LEAH MAREE WILLIS
Gender: Female
Entity Type: Individual
Location Address: 235 W 9TH ST SAN PEDRO, CA 90731
Location Phone: (310) 521-9209
Location Fax: (310) 521-9241
Mailing Address: 235 W 9TH ST SAN PEDRO, CA 90731
Mailing Phone: (310) 521-9209
Mailing Fax: (310) 521-9241
Is Sole Proprietor?: No
Enumeration Date: 04-04-2019
Last Update Date: 04-04-2019
Code Navigator

A Substance Abuse or Addiction Counselor like Leah Willis 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

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 1487116752, 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 → 2

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

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 1 → 2 6 → 12 → 3 5 → 10 → 1

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 + 2 + 1 + 1 + 2 + 7 + 1 + 0 + 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 1487116752.