JERRY SHAFER PHD INC.
NPI 1891723938
Psychologist in Antioch, CA

NPI Status: Active since June 29, 2006

Contact Information

3240 LONE TREE WAY
#104
ANTIOCH, CA
ZIP 94509
Phone: (925) 778-1661
Fax: (925) 778-1661

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  • Organization
  • Psychologist

About JERRY SHAFER PHD INC.

This page provides the complete NPI Profile along with additional information for Jerry Shafer Phd Inc., a provider established in Antioch, California operating as a Psychologist. The healthcare provider is registered in the NPI registry with number 1891723938 assigned on June 2006. The practitioner's primary taxonomy code is 103T00000X with license number PSY3395 (CA). The provider is registered as an organization and their NPI record was last updated 6 years ago. Jerry Shafer Phd Inc. operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The authorized official of this NPI record is Dr. Jerry Shafer Phd (Psychologist)

NPI
1891723938
Provider Name
JERRY SHAFER PHD INC.
Entity Type
Organization
Location Address
3240 LONE TREE WAY #104 ANTIOCH, CA 94509
Location Phone
(925) 778-1661
Location Fax
(925) 778-1661
Mailing Address
3240 LONE TREE WAY #104 ANTIOCH, CA 94509
Mailing Phone
(925) 778-1661
Mailing Fax
(925) 778-1661
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
06-29-2006
Last Update Date
08-22-2020
Code Navigator

A psychologist like Jerry Shafer Phd Inc. studies cognitive, emotional, social processes and behavior by observing, interpreting, and recording how people relate to one another and to their environments. Psychologists gather information and evaluate behavior through controlled laboratory experiments, psychoanalysis, psychotherapy or through personality, performance, aptitude, or intelligence tests, and use this information when testing theories in their research or when treating 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

Taxonomy Code
103T00000X
Type
Behavioral Health & Social Service Providers
License No.
PSY3395
License State
CA
Taxonomy Description
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.

Group Taxonomy 193200000X MULTI-SPECIALTY GROUP

This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

DR. JERRY SHAFER PHD

Authorized Official Title
PSYCHOLOGIST
Authorized Official Phone
(925) 778-1661

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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 1891723938, we treat the final digit (8) 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 72. The final step is to find the difference between that total and the next multiple of ten (80 - 72 = 8).

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
9
Doubled → 18 → 1 + 8
Pos 4
1
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
2
Unchanged
Pos 7
3
Doubled → 6
Pos 8
9
Unchanged
Pos 9
3
Doubled → 6
Check
8
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 7 → 14 → 5 3 → 6 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 1 + 8 + 1 + 1 + 4 + 2 + 6 + 9 + 6 + 24 = 72

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

The next multiple of ten after 72 is 80. The difference is the calculated check digit.

80 - 72 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1891723938.

Other Providers at the Same Location


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

Durable Medical Equipment & Medical Supplies
3240 LONE TREE WAY
ANTIOCH, CA 94509
Orthopaedic Surgery (Sports Medicine)
3240 LONE TREE WAY, SUITE 200
ANTIOCH, CA 94509

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1891723938, enumerated as an "organization" on June 29, 2006.

The provider is located at 3240 LONE TREE WAY #104 ANTIOCH, CA 94509 and the phone number is (925) 778-1661.

Psychologist with taxonomy code 103T00000X.