RACHEL HULL
NPI 1720726219
Genetic Counselor, MS in San Francisco, CA

NPI Status: Active since May 24, 2022

Contact Information

1100 VAN NESS AVE FL 4
SAN FRANCISCO, CA
ZIP 94109
Phone: (415) 600-6400

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

Individual
Female
Genetic Counselor, MS

About RACHEL HULL

This page provides the complete NPI Profile along with additional information for Rachel Hull, a provider established in San Francisco, California with a medical specialization in Genetic Counselor, Ms. The healthcare provider is registered in the NPI registry with number 1720726219 assigned on May 2022. The practitioner's primary taxonomy code is 170300000X with license number GC001577 (CA). The provider is registered as an individual and her NPI record was last updated 4 years ago.

NPI: 1720726219
Provider Name: RACHEL HULL
Gender: Female
Entity Type: Individual
Location Address: 1100 VAN NESS AVE FL 4 SAN FRANCISCO, CA 94109
Location Phone: (415) 600-6400
Mailing Address: 1928 SAN LUIS AVE MOUNTAIN VIEW, CA 94043
Is Sole Proprietor?: No
Enumeration Date: 05-24-2022
Last Update Date: 05-24-2022
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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: Genetic Counselor, MS
Taxonomy Code: 170300000X
Type: Other Service Providers
License No.: GC001577
License State: CA
Taxonomy Description: A masters trained health care provider who collects and interprets genetic family histories; assesses the risk of disease occurrence or recurrence; identifies interventions to manage or ameliorate disease risk; educates about inheritance, testing, management, prevention, ethical issues, resources, and research; and counsels to promote informed choices and adaptation. Certification was established in 1993 by the American Board of Genetic Counseling and prior to that by the American Board of Medical Genetics. Requirements for experience, licensure, and job responsibilities vary among the states.

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 1720726219, we treat the final digit (9) 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).

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 → 4

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

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 2 → 4 7 → 14 → 5 6 → 12 → 3 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 4 + 0 + 1 + 4 + 2 + 1 + 2 + 2 + 2 + 24 = 51

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

The next multiple of ten after 51 is 60. The difference is the calculated check digit.

60 - 51 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1720726219.