SARAH JOHNSON MD
NPI 1588000913
Preventive Medicine - Occupational Medicine in Sacramento, CA

Q: What is the provider's specialty?

The provider's specialty is Preventive Medicine with taxonomy code 2083X0100X and a focus in Occupational Medicine.

NPI Status: Active since May 13, 2013

Contact Information

2108 N ST STE N
SACRAMENTO, CA
ZIP 95816
Phone: (312) 505-8646

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Table of Contents

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

Individual
Female
Preventive Medicine
Occupational Medicine

About SARAH JOHNSON

This page provides the complete NPI Profile along with additional information for Sarah Johnson, a provider established in Sacramento, California with a medical specialization in Preventive Medicine, focusing in occupational medicine . The healthcare provider is registered in the NPI registry with number 1588000913 assigned on May 2013. The practitioner's primary taxonomy code is 2083X0100X with license number A154977 (CA). The provider is registered as an individual and her NPI record was last updated March 2026.

NPI: 1588000913
Provider Name: SARAH JOHNSON MD
Gender: Female
Entity Type: Individual
Location Address: 2108 N ST STE N SACRAMENTO, CA 95816
Location Phone: (312) 505-8646
Mailing Address: 2108 N ST STE N SACRAMENTO, CA 95816
Mailing Phone: (312) 505-8646
Is Sole Proprietor?: No
Enumeration Date: 05-13-2013
Last Update Date: 03-09-2026
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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: Preventive Medicine Occupational Medicine
Taxonomy Code: 2083X0100X
Type: Allopathic & Osteopathic Physicians
License No.: A154977
License State: CA
Taxonomy Description: Occupational medicine focuses on the health of workers, including the ability to perform work; the physical, chemical, biological, and social environments of the workplace; and the health outcomes of environmental exposures. Practitioners in this field address the promotion of health in the work place, and the prevention and management of occupational and environmental injury, illness, and disability.

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 1588000913, 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 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 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 → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 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 8 → 16 → 7 0 → 0 0 → 0 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 6 + 8 + 0 + 0 + 0 + 9 + 2 + 24 = 57

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

The next multiple of ten after 57 is 60. The difference is the calculated check digit.

60 - 57 = 3

This NPI is valid

The calculated check digit is 3, which matches the last digit of 1588000913.