CAROLYN TRACY LIU
NPI 1861989360
Counselor in Foster City, CA

NPI Status: Active since April 19, 2018

Contact Information

976 DIAZ LN
FOSTER CITY, CA
ZIP 94404
Phone: (650) 888-5712

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  • Individual
  • Female
  • Counselor

About CAROLYN LIU

This page provides the complete NPI Profile along with additional information for Carolyn Liu, a provider established in Foster City, California with a medical specialization in Counselor. The healthcare provider is registered in the NPI registry with number 1861989360 assigned on April 2018. The practitioner's primary taxonomy code is 101Y00000X. The provider is registered as an individual and her NPI record was last updated 8 years ago.

NPI
1861989360
Provider Name
CAROLYN TRACY LIU
Gender
Female
Entity Type
Individual
Location Address
976 DIAZ LN FOSTER CITY, CA 94404
Location Phone
(650) 888-5712
Mailing Address
976 DIAZ LN FOSTER CITY, CA 94404
Mailing Phone
(650) 888-5712
Is Sole Proprietor?
Yes
Enumeration Date
04-19-2018
Last Update Date
11-05-2018
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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

Counselor

Taxonomy Code
101Y00000X
Type
Behavioral Health & Social Service Providers
Taxonomy Description
A provider who is trained and educated in the performance of behavior health services through interpersonal communications and analysis. Training and education at the specialty level usually requires a master's degree and clinical experience and supervision for licensure or certification.

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)
1225X00000XRespiratory, Developmental, Rehabilitative and Restorative Service Providers

Occupational Therapist

16379 (CA)

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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 1861989360, 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 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 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
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
6
Doubled → 12 → 1 + 2
Pos 4
1
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
8
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
3
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
0
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 6 → 12 → 3 9 → 18 → 9 9 → 18 → 9 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 1 + 2 + 1 + 1 + 8 + 8 + 1 + 8 + 3 + 1 + 2 + 24 = 70

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

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

70 - 70 = 0
This NPI is valid
The calculated check digit is 0, which matches the last digit of 1861989360.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1861989360, enumerated as an "individual" on April 19, 2018.

The provider is located at 976 DIAZ LN FOSTER CITY, CA 94404 and the phone number is (650) 888-5712.

Counselor with taxonomy code 101Y00000X.