CALISTA MACKENZIE GANN
NPI 1215695606
Community/Behavioral Health in Spokane, WA

NPI Status: Active since December 02, 2021

Contact Information

106 W MISSION AVE
SPOKANE, WA
ZIP 99201
Phone: (509) 473-4810

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

Individual
Female
Community/Behavioral Health

About CALISTA GANN

This page provides the complete NPI Profile along with additional information for Calista Gann, a provider established in Spokane, Washington with a medical specialization in Community/behavioral Health. The healthcare provider is registered in the NPI registry with number 1215695606 assigned on December 2021. The practitioner's primary taxonomy code is 251S00000X. The provider is registered as an individual and her NPI record was last updated January 2026.

NPI: 1215695606
Provider Name: CALISTA MACKENZIE GANN
Gender: Female
Entity Type: Individual
Location Address: 106 W MISSION AVE SPOKANE, WA 99201
Location Phone: (509) 473-4810
Mailing Address: 106 W MISSION AVE SPOKANE, WA 99201
Mailing Phone: (509) 473-4810
Is Sole Proprietor?: No
Enumeration Date: 12-02-2021
Last Update Date: 01-27-2026
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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: Community/Behavioral Health
Taxonomy Code: 251S00000X
Type: Agencies
Taxonomy Description: A private or public agency usually under local government jurisdiction, responsible for assuring the delivery of community based mental health, intellectual disabilities, substance abuse and/or behavioral health services to individuals with those disabilities. Services may range from companion care, respite, transportation, community integration, crisis intervention and stabilization, supported employment, day support, prevocational services, residential support, therapeutic and supportive consultation, environmental modifications, intensive in-home therapy and day treatment, in addition to traditional mental health and behavioral treatment.

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 1215695606, we treat the final digit (6) 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 6).

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 → 2

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

Pos 8

Unchanged

Pos 9

Doubled → 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 1 → 2 6 → 12 → 3 5 → 10 → 1 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 2 + 5 + 1 + 2 + 9 + 1 + 0 + 6 + 0 + 24 = 54

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

The next multiple of ten after 54 is 60. The difference is the calculated check digit.

60 - 54 = 6

This NPI is valid

The calculated check digit is 6, which matches the last digit of 1215695606.