MR. GLEN ANTONIO CLARK III
NPI 1952585218
Counselor - Addiction (Substance Use Disorder) in San Francisco, CA

NPI Status: Active since December 21, 2007

Contact Information

1301 PIERCE ST.
SAN FRANCISCO, CA
ZIP 94115
Phone: (415) 563-8200
Fax: (510) 644-2044

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  • Individual
  • Male
  • Counselor
  • Addiction (Substance Use Disorder)

About GLEN CLARK

This page provides the complete NPI Profile along with additional information for Glen Clark, a provider established in San Francisco, California with a medical specialization in Counselor, focusing in addiction (substance use disorder) . The healthcare provider is registered in the NPI registry with number 1952585218 assigned on December 2007. The practitioner's primary taxonomy code is 101YA0400X. The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1952585218
Provider Name
MR. GLEN ANTONIO CLARK III
Gender
Male
Entity Type
Individual
Location Address
1301 PIERCE ST. SAN FRANCISCO, CA 94115
Location Phone
(415) 563-8200
Location Fax
(510) 644-2044
Mailing Address
1153 OAK ST. SAN FRANCISCO, CA 94117
Mailing Phone
(415) 431-9000
Mailing Fax
(510) 644-2044
Is Sole Proprietor?
No
Enumeration Date
12-21-2007
Last Update Date
12-17-2024
Code Navigator

A Substance Abuse or Addiction Counselor like Glen Clark 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

Secondary Locations

  • 900 Laurel Ave
    San Mateo, CA 94401
    (650) 347-8088

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

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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 1952585218, we treat the final digit (8) 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 52. The final step is to find the difference between that total and the next multiple of ten (60 - 52 = 8).

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
1
Doubled → 2
Pos 2
9
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
2
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
8
Unchanged
Pos 7
5
Doubled → 10 → 1 + 0
Pos 8
2
Unchanged
Pos 9
1
Doubled → 2
Check
8
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 5 → 10 → 1 5 → 10 → 1 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 1 + 0 + 2 + 1 + 0 + 8 + 1 + 0 + 2 + 2 + 24 = 52

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

The next multiple of ten after 52 is 60. The difference is the calculated check digit.

60 - 52 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1952585218.

Other Providers at the Same Location


The following 1 provider is registered at the same or a nearby location.

Counselor
1301 PIERCE ST.
SAN FRANCISCO, CA 94115

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1952585218, enumerated as an "individual" on December 21, 2007.

The provider is located at 1301 PIERCE ST. SAN FRANCISCO, CA 94115 and the phone number is (415) 563-8200.

Counselor with taxonomy code 101YA0400X and a focus in Addiction (Substance Use Disorder).