DR. STEPHEN SCOTT SMITH PHD
NPI 1558644799
Psychologist - Clinical in Redwood City, CA

NPI Status: Active since September 23, 2011

Contact Information

631 WOODSIDE RD
REDWOOD CITY, CA
ZIP 94061
Phone: (650) 367-9030

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NPPES record last updated: August 3, 2023. Verified against the NPPES registry weekly; last sync: July 12, 2026.

  • Individual
  • Male
  • Psychologist
  • Clinical

About STEPHEN SMITH

This page provides the complete NPI Profile along with additional information for Stephen Smith, a provider established in Redwood City, California with a medical specialization in Psychologist, focusing in clinical . The healthcare provider is registered in the NPI registry with number 1558644799 assigned on September 2011. The practitioner's primary taxonomy code is 103TC0700X with license number PSY30877 (CA). The provider is registered as an individual and his NPI record was last updated 3 years ago.

NPI
1558644799
Provider Name
DR. STEPHEN SCOTT SMITH PHD
Gender
Male
Entity Type
Individual
Location Address
631 WOODSIDE RD REDWOOD CITY, CA 94061
Location Phone
(650) 367-9030
Mailing Address
631 WOODSIDE RD REDWOOD CITY, CA 94061
Mailing Phone
(650) 367-9030
Is Sole Proprietor?
Yes
Enumeration Date
09-23-2011
Last Update Date
08-03-2023
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A clinical psychologist like Stephen Smith assesses, diagnoses, and treats mental, emotional, and behavioral disorders. Clinical psychologists help people deal with problems ranging from short-term personal issues to severe, chronic conditions. Clinical psychologists interview patients, give diagnostic tests, provide psychotherapy and design behavior modification programs to help patients.

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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

Psychologist Clinical

Taxonomy Code
103TC0700X
Type
Behavioral Health & Social Service Providers
License No.
PSY30877
License State
CA
Taxonomy Description
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

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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 1558644799, 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 71. The final step is to find the difference between that total and the next multiple of ten (80 - 71 = 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
1
Doubled → 2
Pos 2
5
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
8
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
4
Unchanged
Pos 7
4
Doubled → 8
Pos 8
7
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
9
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 5 → 10 → 1 6 → 12 → 3 4 → 8 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 0 + 8 + 1 + 2 + 4 + 8 + 7 + 1 + 8 + 24 = 71

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

The next multiple of ten after 71 is 80. The difference is the calculated check digit.

80 - 71 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1558644799.

Other Providers at the Same Location


The following 11 providers are registered at the same or a nearby location.

Counselor (Addiction (Substance Use Disorder))
631 WOODSIDE RD
REDWOOD CITY, CA 94061
Counselor (Addiction (Substance Use Disorder))
631 WOODSIDE RD
REDWOOD CITY, CA 94061
Counselor (Addiction (Substance Use Disorder))
631 WOODSIDE RD
REDWOOD CITY, CA 94061
Psychologist (Clinical)
631 WOODSIDE RD
REDWOOD CITY, CA 94061
Social Worker (Clinical)
631 WOODSIDE RD
REDWOOD CITY, CA 94061
Psychologist (Clinical)
631 WOODSIDE RD
REDWOOD CITY, CA 94061
Counselor (Addiction (Substance Use Disorder))
631 WOODSIDE RD
REDWOOD CITY, CA 94061
Marriage & Family Therapist
631 WOODSIDE RD
REDWOOD CITY, CA 94061
Counselor (Addiction (Substance Use Disorder))
631 WOODSIDE RD
REDWOOD CITY, CA 94061
Peer Specialist
631 WOODSIDE RD
REDWOOD CITY, CA 94061
Marriage & Family Therapist
631 WOODSIDE RD
REDWOOD CITY, CA 94061

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1558644799, enumerated as an "individual" on September 23, 2011.

The provider is located at 631 WOODSIDE RD REDWOOD CITY, CA 94061 and the phone number is (650) 367-9030.

Psychologist with taxonomy code 103TC0700X and a focus in Clinical.