CASSIE DIANE MCGOWAN SUDCC
NPI 1770211591
Counselor - Addiction (Substance Use Disorder) in San Diego, CA

NPI Status: Active since August 10, 2022

Contact Information

286 EUCLID AVE STE 102
SAN DIEGO, CA
ZIP 92114
Phone: (619) 859-6270
Fax: (619) 527-8536

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

Individual
Female
Counselor
Addiction (Substance Use Disorder)

About CASSIE MCGOWAN

This page provides the complete NPI Profile along with additional information for Cassie Mcgowan, a provider established in San Diego, California with a medical specialization in Counselor, focusing in addiction (substance use disorder) . The healthcare provider is registered in the NPI registry with number 1770211591 assigned on August 2022. The practitioner's primary taxonomy code is 101YA0400X with license number 17879 (CA). The provider is registered as an individual and her NPI record was last updated January 2026.

NPI: 1770211591
Provider Name: CASSIE DIANE MCGOWAN SUDCC
Gender: Female
Entity Type: Individual
Location Address: 286 EUCLID AVE STE 102 SAN DIEGO, CA 92114
Location Phone: (619) 859-6270
Location Fax: (619) 527-8536
Mailing Address: 630 BRADFORD RD EL CAJON, CA 92019
Mailing Phone: (619) 972-4207
Is Sole Proprietor?: No
Enumeration Date: 08-10-2022
Last Update Date: 01-14-2026
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A Substance Abuse or Addiction Counselor like Cassie Mcgowan 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.: 17879
License State: CA

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No.	Taxonomy Code	Type	Classification / Specialization	License No. (State)
1	101YP2500X	Behavioral Health & Social Service Providers	Counselor Professional	17879 (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 1770211591, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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 → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 4

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 18 → 1 + 8

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 7 → 14 → 5 2 → 4 1 → 2 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 1 + 4 + 0 + 4 + 1 + 2 + 5 + 1 + 8 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1770211591.