Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

CLAIRE ALEXIS MASTERSON MS
NPI 1902689482
Genetic Counselor, MS in Santa Barbara, CA

Active since August 17, 2023
224 W ISLAY ST APT B, SANTA BARBARA, CA 93101(714) 328-0086 Get Directions Write a Review

NPPES record last updated: July 7, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jul 7, 2026, Aug 17, 2023 (2 updates tracked since 2023).

  • Individual
  • Female
  • Genetic Counselor, MS

About CLAIRE MASTERSON

This page provides the complete NPI Profile along with additional information for Claire Masterson, a provider established in Santa Barbara, California with a medical specialization in Genetic Counselor, Ms. The healthcare provider is registered in the NPI registry with number 1902689482 assigned on August 2023. The practitioner's primary taxonomy code is 170300000X with license number GEN-511 (ID). The provider is registered as an individual and her NPI record was last updated July 2026.

NPI
1902689482
Provider Name
CLAIRE ALEXIS MASTERSON MS
Gender
Female
Entity Type
Individual
Location Address
224 W ISLAY ST APT B SANTA BARBARA, CA 93101
Location Phone
(714) 328-0086
Mailing Address
224 W ISLAY ST APT B SANTA BARBARA, CA 93101
Mailing Phone
(714) 328-0086
Is Sole Proprietor?
No
Enumeration Date
08-17-2023
Last Update Date
07-07-2026
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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

Genetic Counselor, MS

Taxonomy Code
170300000X
Type
Other Service Providers
License No.
GEN-511
License State
ID
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.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1170300000XOther Service Providers

Genetic Counselor, MS

GC002097 (CA)

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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 1902689482, 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 68. The final step is to find the difference between that total and the next multiple of ten (70 - 68 = 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
1
Doubled → 2
Pos 2
9
Unchanged
Pos 3
0
Doubled → 0
Pos 4
2
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
8
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
4
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
Check
2
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 0 → 0 6 → 12 → 3 9 → 18 → 9 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 0 + 2 + 1 + 2 + 8 + 1 + 8 + 4 + 1 + 6 + 24 = 68

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

The next multiple of ten after 68 is 70. The difference is the calculated check digit.

70 - 68 = 2
This NPI is valid
The calculated check digit is 2, which matches the last digit of 1902689482.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1902689482, enumerated as an "individual" on August 17, 2023.

The provider is located at 224 W ISLAY ST APT B SANTA BARBARA, CA 93101 and the phone number is (714) 328-0086.

Genetic Counselor, MS with taxonomy code 170300000X.