DR. MICHAEL A JOHNSON DVM
NPI 1447375068
Veterinarian in Lawrence, MA

NPI Status: Active since March 20, 2007

Contact Information

160 WINTHROP AVE
JOHNSON VETERINARY HOSPITAL, P.C.
LAWRENCE, MA
ZIP 01843
Phone: (978) 794-0022
Fax: (978) 794-4356

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

Individual
Male
Veterinarian

About MICHAEL JOHNSON

This page provides the complete NPI Profile along with additional information for Michael Johnson, a provider established in Lawrence, Massachusetts with a medical specialization in Veterinarian. The healthcare provider is registered in the NPI registry with number 1447375068 assigned on March 2007. The practitioner's primary taxonomy code is 174M00000X with license number 2498 (MA). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI: 1447375068
Provider Name: DR. MICHAEL A JOHNSON DVM
Gender: Male
Entity Type: Individual
Location Address: 160 WINTHROP AVE JOHNSON VETERINARY HOSPITAL, P.C. LAWRENCE, MA 01843
Location Phone: (978) 794-0022
Location Fax: (978) 794-4356
Mailing Address: 160 WINTHROP AVE JOHNSON VETERINARY HOSPITAL, P.C. LAWRENCE, MA 01843
Mailing Phone: (978) 794-0022
Mailing Fax: (978) 794-4356
Is Sole Proprietor?: No
Enumeration Date: 03-20-2007
Last Update Date: 07-08-2007
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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: Veterinarian
Taxonomy Code: 174M00000X
Type: Other Service Providers
License No.: 2498
License State: MA
Taxonomy Description: A doctor of veterinary medicine, trained and authorized to practice veterinarian medicine and surgery.

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 1447375068, 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 8

Pos 4

Unchanged

Pos 5

Doubled → 6

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

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 4 → 8 3 → 6 5 → 10 → 1 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 8 + 7 + 6 + 7 + 1 + 0 + 0 + 1 + 2 + 24 = 62

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

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1447375068.