DR. JEFFREY S. JOHNSTON M.D.
NPI 1578618302
Pathology - Forensic Pathology in Phoenix, AZ

NPI Status: Active since January 24, 2007

Contact Information

701 W JEFFERSON ST
PHOENIX, AZ
ZIP 85007
Phone: (602) 506-3322

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

Individual
Male
Pathology
Forensic Pathology

About JEFFREY JOHNSTON

This page provides the complete NPI Profile along with additional information for Jeffrey Johnston, a provider established in Phoenix, Arizona with a medical specialization in Pathology, focusing in forensic pathology . The healthcare provider is registered in the NPI registry with number 1578618302 assigned on January 2007. The practitioner's primary taxonomy code is 207ZF0201X with license number 37781 (AZ). The provider is registered as an individual and his NPI record was last updated 5 years ago.

NPI: 1578618302
Provider Name: DR. JEFFREY S. JOHNSTON M.D.
Gender: Male
Entity Type: Individual
Location Address: 701 W JEFFERSON ST PHOENIX, AZ 85007
Location Phone: (602) 506-3322
Mailing Address: 701 W JEFFERSON ST PHOENIX, AZ 85007
Mailing Phone: (602) 506-3322
Is Sole Proprietor?: No
Enumeration Date: 01-24-2007
Last Update Date: 09-07-2021
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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: Pathology Forensic Pathology
Taxonomy Code: 207ZF0201X
Type: Allopathic & Osteopathic Physicians
License No.: 37781
License State: AZ
Taxonomy Description: A forensic pathologist is expert in investigating and evaluating cases of sudden, unexpected, suspicious and violent death as well as other specific classes of death defined by law. The forensic pathologist serves the public as coroner or medical examiner, or by performing medicolegal autopsies for such officials.

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 1578618302, we treat the final digit (2) 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 58. The final step is to find the difference between that total and the next multiple of ten (60 - 58 = 2).

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 → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 16 → 1 + 6

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 7 → 14 → 5 6 → 12 → 3 8 → 16 → 7 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 4 + 8 + 1 + 2 + 1 + 1 + 6 + 3 + 0 + 24 = 58

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

The next multiple of ten after 58 is 60. The difference is the calculated check digit.

60 - 58 = 2

This NPI is valid

The calculated check digit is 2, which matches the last digit of 1578618302.