JUDY ROSE BARBER PHARMD
NPI 1639045420
Pharmacy - Specialty Pharmacy in San Francisco, CA

NPI Status: Active since October 17, 2025

Contact Information

2100 WEBSTER ST STE 105
SAN FRANCISCO, CA
ZIP 94115
Phone: (415) 441-5742

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

Individual
Female
Pharmacy
Specialty Pharmacy

About JUDY ROSE BARBER

This page provides the complete NPI Profile along with additional information for Judy Rose Barber, a provider established in San Francisco, California with a medical specialization in Pharmacy, focusing in specialty pharmacy . The healthcare provider is registered in the NPI registry with number 1639045420 assigned on October 2025. The practitioner's primary taxonomy code is 3336S0011X. The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1639045420
Provider Name: JUDY ROSE BARBER PHARMD
Gender: Female
Entity Type: Individual
Location Address: 2100 WEBSTER ST STE 105 SAN FRANCISCO, CA 94115
Location Phone: (415) 441-5742
Mailing Address: 39900 BLACOW RD APT 51 FREMONT, CA 94538
Is Sole Proprietor?: Yes
Enumeration Date: 10-17-2025
Last Update Date: 10-17-2025
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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: Pharmacy Specialty Pharmacy
Taxonomy Code: 3336S0011X
Type: Suppliers
Taxonomy Description: A pharmacy that dispenses generally low volume and high cost medicinal preparations to patients who are undergoing intensive therapies for illnesses that are generally chronic, complex and potentially life threatening. Often these therapies require specialized delivery and administration.

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 1639045420, we treat the final digit (0) 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

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 → 6

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

Pos 8

Unchanged

Pos 9

Doubled → 4

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 3 → 6 0 → 0 5 → 10 → 1 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 6 + 9 + 0 + 4 + 1 + 0 + 4 + 4 + 24 = 60

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

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

60 - 60 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1639045420.