TONYA CHAUSSEE
NPI 1902745599
Peer Specialist in Missoula, MT

NPI Status: Active since March 27, 2026

Contact Information

3815 S 7TH ST W
MISSOULA, MT
ZIP 59804
Phone: (406) 540-7001

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  • Individual
  • Female
  • Peer Specialist

About TONYA CHAUSSEE

This page provides the complete NPI Profile along with additional information for Tonya Chaussee, a provider established in Missoula, Montana with a medical specialization in Peer Specialist. The healthcare provider is registered in the NPI registry with number 1902745599 assigned on March 2026. The practitioner's primary taxonomy code is 175T00000X. The provider is registered as an individual and her NPI record was last updated March 2026.

NPI
1902745599
Provider Name
TONYA CHAUSSEE
Gender
Female
Entity Type
Individual
Location Address
3815 S 7TH ST W MISSOULA, MT 59804
Location Phone
(406) 540-7001
Mailing Address
18600 SE MCLOUGHLIN BLVD MILWAUKIE, OR 97267
Mailing Phone
(503) 946-3267
Is Sole Proprietor?
No
Enumeration Date
03-27-2026
Last Update Date
03-27-2026
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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

Peer Specialist

Taxonomy Code
175T00000X
Type
Other Service Providers
Taxonomy Description
Individuals certified to perform peer support services through a training process defined by a government agency, such as the Department of Veterans Affairs or a state mental health department/certification/licensing authority.

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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 1902745599, we treat the final digit (9) 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 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).

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
0
Doubled → 0
Pos 4
2
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
4
Unchanged
Pos 7
5
Doubled → 10 → 1 + 0
Pos 8
5
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
9
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 0 → 0 7 → 14 → 5 5 → 10 → 1 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 0 + 2 + 1 + 4 + 4 + 1 + 0 + 5 + 1 + 8 + 24 = 61

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

The next multiple of ten after 61 is 70. The difference is the calculated check digit.

70 - 61 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1902745599.

Other Providers at the Same Location


The following 4 providers are registered at the same or a nearby location.

Counselor (Addiction (Substance Use Disorder))
3815 S 7TH ST W
MISSOULA, MT 59804
Peer Specialist
3815 S 7TH ST W
MISSOULA, MT 59804
Peer Specialist
3815 S 7TH ST W
MISSOULA, MT 59804
Counselor (Mental Health)
3815 S 7TH ST W
MISSOULA, MT 59804

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1902745599, enumerated as an "individual" on March 27, 2026.

The provider is located at 3815 S 7TH ST W MISSOULA, MT 59804 and the phone number is (406) 540-7001.

Peer Specialist with taxonomy code 175T00000X.