MR. JOSEPH LEONARD MINARDI
NPI 1891116083
Rehabilitation Practitioner in San Francisco, CA

NPI Status: Active since December 15, 2013

Contact Information

2712 MISSION ST
SAN FRANCISCO, CA
ZIP 94110
Phone: (628) 754-8800
Fax: (415) 401-2741

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

Individual
Male
Rehabilitation Practitioner

About JOSEPH MINARDI

This page provides the complete NPI Profile along with additional information for Joseph Minardi, a provider established in San Francisco, California with a medical specialization in Rehabilitation Practitioner. The healthcare provider is registered in the NPI registry with number 1891116083 assigned on December 2013. The practitioner's primary taxonomy code is 225400000X. The provider is registered as an individual and his NPI record was last updated January 2026.

NPI: 1891116083
Provider Name: MR. JOSEPH LEONARD MINARDI
Gender: Male
Entity Type: Individual
Location Address: 2712 MISSION ST SAN FRANCISCO, CA 94110
Location Phone: (628) 754-8800
Location Fax: (415) 401-2741
Mailing Address: 2712 MISSION ST SAN FRANCISCO, CA 94110
Mailing Phone: (628) 754-8800
Mailing Fax: (415) 401-2741
Is Sole Proprietor?: No
Enumeration Date: 12-15-2013
Last Update Date: 01-20-2026
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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: Rehabilitation Practitioner
Taxonomy Code: 225400000X
Type: Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Description: A health care practitioner who trains or retrains individuals disabled by disease or injury to help them attain their maximum functional capacity.

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 1891116083, 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 → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 2

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 6

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 9 → 18 → 9 1 → 2 6 → 12 → 3 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 1 + 8 + 1 + 2 + 1 + 1 + 2 + 0 + 1 + 6 + 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 1891116083.