LAUREN REBECCA TONG
NPI 1598374563
Speech-Language Pathologist in San Francisco, CA

NPI Status: Active since July 27, 2020

Contact Information

251 RHODE ISLAND ST STE 101
SAN FRANCISCO, CA
ZIP 94103
Phone: (415) 580-7604

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  • Individual
  • Female
  • Speech-Language Pathologist

About LAUREN TONG

This page provides the complete NPI Profile along with additional information for Lauren Tong, a provider established in San Francisco, California with a medical specialization in Speech-language Pathologist. The healthcare provider is registered in the NPI registry with number 1598374563 assigned on July 2020. The practitioner's primary taxonomy code is 235Z00000X with license number 31723 (CA). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI
1598374563
Provider Name
LAUREN REBECCA TONG
Gender
Female
Entity Type
Individual
Location Address
251 RHODE ISLAND ST STE 101 SAN FRANCISCO, CA 94103
Location Phone
(415) 580-7604
Mailing Address
555 4TH ST UNIT 628 SAN FRANCISCO, CA 94107
Mailing Phone
(423) 208-1591
Is Sole Proprietor?
No
Enumeration Date
07-27-2020
Last Update Date
07-01-2025
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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

Speech-Language Pathologist

Taxonomy Code
235Z00000X
Type
Speech, Language and Hearing Service Providers
License No.
31723
License State
CA
Taxonomy Description
The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.

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)
1235Z00000XSpeech, Language and Hearing Service Providers

Speech-Language Pathologist

035552 (NY)

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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 1598374563, 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 77. The final step is to find the difference between that total and the next multiple of ten (80 - 77 = 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
1
Doubled → 2
Pos 2
5
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
8
Unchanged
Pos 5
3
Doubled → 6
Pos 6
7
Unchanged
Pos 7
4
Doubled → 8
Pos 8
5
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
3
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 3 → 6 4 → 8 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 8 + 8 + 6 + 7 + 8 + 5 + 1 + 2 + 24 = 77

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

The next multiple of ten after 77 is 80. The difference is the calculated check digit.

80 - 77 = 3
This NPI is valid
The calculated check digit is 3, which matches the last digit of 1598374563.

Other Providers at the Same Location


The following 2 providers are registered at the same or a nearby location.

Audiologist-Hearing Aid Fitter
251 RHODE ISLAND ST STE 101
SAN FRANCISCO, CA 94103
Audiologist
251 RHODE ISLAND ST STE 101
SAN FRANCISCO, CA 94103

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1598374563, enumerated as an "individual" on July 27, 2020.

The provider is located at 251 RHODE ISLAND ST STE 101 SAN FRANCISCO, CA 94103 and the phone number is (415) 580-7604.

Speech-Language Pathologist with taxonomy code 235Z00000X.