MR. WALTER STEPHEN ERNSDORF PHD
NPI 1801941026
Psychologist in Laguna Niguel, CA

NPI Status: Active since January 25, 2007

Contact Information

30131 TOWN CENTER DR
SUITE 280
LAGUNA NIGUEL, CA
ZIP 92677
Phone: (949) 495-8853
Fax: (949) 495-7686

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  • Individual
  • Male
  • Psychologist

About WALTER ERNSDORF

This page provides the complete NPI Profile along with additional information for Walter Ernsdorf, a provider established in Laguna Niguel, California with a medical specialization in Psychologist. The healthcare provider is registered in the NPI registry with number 1801941026 assigned on January 2007. The practitioner's primary taxonomy code is 103T00000X with license number PSY10594 (CA). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI
1801941026
Provider Name
MR. WALTER STEPHEN ERNSDORF PHD
Gender
Male
Entity Type
Individual
Location Address
30131 TOWN CENTER DR SUITE 280 LAGUNA NIGUEL, CA 92677
Location Phone
(949) 495-8853
Location Fax
(949) 495-7686
Mailing Address
229 CALLE MARINA SAN CLEMENTE, CA 92677
Mailing Phone
(949) 495-8853
Mailing Fax
(949) 495-7686
Is Sole Proprietor?
No
Enumeration Date
01-25-2007
Last Update Date
07-08-2007
Code Navigator

A psychologist like Walter Ernsdorf 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.

Location Map

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.
PSY10594
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.

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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 1801941026, we treat the final digit (6) 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 6).

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
0
Doubled → 0
Pos 4
1
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
4
Unchanged
Pos 7
1
Doubled → 2
Pos 8
0
Unchanged
Pos 9
2
Doubled → 4
Check
6
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 9 → 18 → 9 1 → 2 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 0 + 1 + 1 + 8 + 4 + 2 + 0 + 4 + 24 = 54

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

The next multiple of ten after 54 is 60. The difference is the calculated check digit.

60 - 54 = 6
This NPI is valid
The calculated check digit is 6, which matches the last digit of 1801941026.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Marriage & Family Therapist
30131 TOWN CENTER DR, SUITE 104
LAGUNA NIGUEL, CA 92677
Marriage & Family Therapist
30131 TOWN CENTER DR, SUITE 104
LAGUNA NIGUEL, CA 92677
Specialist
30131 TOWN CENTER DR, SUITE 204
LAGUNA NIGUEL, CA 92677
Dentist (General Practice)
30131 TOWN CENTER DR, SUITE 150
LAGUNA NIGUEL, CA 92677
Internal Medicine
30131 TOWN CENTER DR, SUITE 140
LAGUNA NIGUEL, CA 92677
Psychologist
30131 TOWN CENTER DR, SUITE 298
LAGUNA NIGUEL, CA 92677
Internal Medicine
30131 TOWN CENTER DR, SUITE 215
LAGUNA NIGUEL, CA 92677
Dentist (General Practice)
30131 TOWN CENTER DR, #220
LAGUNA NIGUEL, CA 92677
Psychologist (Clinical)
30131 TOWN CENTER DR, SUITE 280
LAGUNA NIGUEL, CA 92677
Marriage & Family Therapist
30131 TOWN CENTER DR, SUITE 104
LAGUNA NIGUEL, CA 92677
Marriage & Family Therapist
30131 TOWN CENTER DR, #235
LAGUNA NIGUEL, CA 92677
Marriage & Family Therapist
30131 TOWN CENTER DR, SUITE 280
LAGUNA NIGUEL, CA 92677
Social Worker (Clinical)
30131 TOWN CENTER DR, 104
LAGUNA NIGUEL, CA 92677
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
30131 TOWN CENTER DR, 195
LAGUNA NIGUEL, CA 92677
Custodial Care Facility (Adult Care Home)
30131 TOWN CENTER DR, SUITE 205
LAGUNA NIGUEL, CA 92677
Technician, Other (EEG)
30131 TOWN CENTER DR, SUITE 195
LAGUNA NIGUEL, CA 92677
Family Medicine
30131 TOWN CENTER DR, SUITE 250
LAGUNA NIGUEL, CA 92677
Clinic/Center
30131 TOWN CENTER DR, SUITE 237
LAGUNA NIGUEL, CA 92677
Marriage & Family Therapist
30131 TOWN CENTER DR, SUITE 292
LAGUNA NIGUEL, CA 92677
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
30131 TOWN CENTER DR, 195
LAGUNA NIGUEL, CA 92677

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1801941026, enumerated as an "individual" on January 25, 2007.

The provider is located at 30131 TOWN CENTER DR SUITE 280 LAGUNA NIGUEL, CA 92677 and the phone number is (949) 495-8853.

Psychologist with taxonomy code 103T00000X.