MR. CHRISTOPHER M DENNEHY
NPI 1376424663
Community Health Worker in St Johnsbury, VT

NPI Status: Active since September 11, 2025

Contact Information

2225 PORTLAND ST
ST JOHNSBURY, VT
ZIP 05819
Phone: (802) 624-1101

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

Individual
Male
Community Health Worker

About CHRISTOPHER DENNEHY

This page provides the complete NPI Profile along with additional information for Christopher Dennehy, a provider established in St Johnsbury, Vermont with a medical specialization in Community Health Worker. The healthcare provider is registered in the NPI registry with number 1376424663 assigned on September 2025. The practitioner's primary taxonomy code is 172V00000X. The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1376424663
Provider Name: MR. CHRISTOPHER M DENNEHY
Gender: Male
Entity Type: Individual
Location Address: 2225 PORTLAND ST ST JOHNSBURY, VT 05819
Location Phone: (802) 624-1101
Mailing Address: 2225 PORTLAND ST ST JOHNSBURY, VT 05819
Mailing Phone: (802) 624-1101
Is Sole Proprietor?: No
Enumeration Date: 09-11-2025
Last Update Date: 09-11-2025
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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 Health Worker
Taxonomy Code: 172V00000X
Type: Other Service Providers
License State: VT
Taxonomy Description: Community health workers (CHW) are lay members of communities who work either for pay or as volunteers in association with the local health care system in both urban and rural environments and usually share ethnicity, language, socioeconomic status and life experiences with the community members they serve. They have been identified by many titles such as community health advisors, lay health advocates, promotores(as), outreach educators, community health representatives, peer health promoters, and peer health educators. CHWs offer interpretation and translation services, provide culturally appropriate health education and information, assist people in receiving the care they need, give informal counseling and guidance on health behaviors, advocate for individual and community health needs, and provide some direct services such as first aid and blood pressure screening. Some examples of these practitioners are Community Health Aides or Practitioners established under 25 USC 1616 (l) under HHS, Indian Health Service, Public Health Service.

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 1376424663, we treat the final digit (3) 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 67. The final step is to find the difference between that total and the next multiple of ten (70 - 67 = 3).

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 → 8

Pos 6

Unchanged

Pos 7

Doubled → 8

Pos 8

Unchanged

Pos 9

Doubled → 12 → 1 + 2

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 4 → 8 4 → 8 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 1 + 4 + 6 + 8 + 2 + 8 + 6 + 1 + 2 + 24 = 67

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

The next multiple of ten after 67 is 70. The difference is the calculated check digit.

70 - 67 = 3

This NPI is valid

The calculated check digit is 3, which matches the last digit of 1376424663.