DR. JANNA MARIA CASILLAS PSYD
NPI 1235904111
Psychologist in Fontana, CA

NPI Status: Active since November 20, 2023

Contact Information

16465 SIERRA LAKES PKWY STE 140
FONTANA, CA
ZIP 92336
Phone: (909) 244-9593
Fax: (833) 903-0337

NPI Profile Information
Primary Taxonomy
Secondary Locations
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Psychologist

About JANNA CASILLAS

This page provides the complete NPI Profile along with additional information for Janna Casillas, a provider established in Fontana, California with a medical specialization in Psychologist. The healthcare provider is registered in the NPI registry with number 1235904111 assigned on November 2023. The practitioner's primary taxonomy code is 103T00000X with license number 34680 (CA). The provider is registered as an individual and her NPI record was last updated 2 years ago.

NPI: 1235904111
Provider Name: DR. JANNA MARIA CASILLAS PSYD
Other Name: JANNA MARIA SCHIRMER
Other Name Type: Former Name (1)
Gender: Female
Entity Type: Individual
Location Address: 16465 SIERRA LAKES PKWY STE 140 FONTANA, CA 92336
Location Phone: (909) 244-9593
Location Fax: (833) 903-0337
Mailing Address: 262 N LOS ROBLES AVE APT 114 PASADENA, CA 91101
Mailing Phone: (817) 863-1085
Is Sole Proprietor?: Yes
Enumeration Date: 11-20-2023
Last Update Date: 06-11-2024
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A psychologist like Janna Casillas 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

Secondary Locations

180 N Oakland Ave
Pasadena, CA 91101
(626) 584-5555

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.: 34680
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.

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 1235904111, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 6

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 8

Pos 6

Unchanged

Pos 7

Doubled → 8

Pos 8

Unchanged

Pos 9

Doubled → 2

Check

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 3 → 6 9 → 18 → 9 4 → 8 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 6 + 5 + 1 + 8 + 0 + 8 + 1 + 2 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1235904111.