DR. DAVID LAURENCE FASK PH.D.
NPI 1669825261
Psychologist in Philadelphia, PA

NPI Status: Active since July 19, 2016

Contact Information

255 S 17TH ST
STE. 1010
PHILADELPHIA, PA
ZIP 19103
Phone: (484) 474-0353

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  • Individual
  • Male
  • Psychologist

About DAVID FASK

This page provides the complete NPI Profile along with additional information for David Fask, a provider established in Philadelphia, Pennsylvania with a medical specialization in Psychologist. The healthcare provider is registered in the NPI registry with number 1669825261 assigned on July 2016. The practitioner's primary taxonomy code is 103T00000X with license number PS018075 (PA). The provider is registered as an individual and his NPI record was last updated 10 years ago.

NPI
1669825261
Provider Name
DR. DAVID LAURENCE FASK PH.D.
Gender
Male
Entity Type
Individual
Location Address
255 S 17TH ST STE. 1010 PHILADELPHIA, PA 19103
Location Phone
(484) 474-0353
Mailing Address
255 S 17TH ST STE. 1010 PHILADELPHIA, PA 19103
Mailing Phone
(484) 474-0353
Is Sole Proprietor?
Yes
Enumeration Date
07-19-2016
Last Update Date
09-09-2016
Code Navigator

A psychologist like David Fask 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.
PS018075
License State
PA
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.

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)
1103T00000XBehavioral Health & Social Service Providers

Psychologist

35SI00568700 (NJ)

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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 1669825261, 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
1
Doubled → 2
Pos 2
6
Unchanged
Pos 3
6
Doubled → 12 → 1 + 2
Pos 4
9
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
2
Unchanged
Pos 7
5
Doubled → 10 → 1 + 0
Pos 8
2
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
1
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 6 → 12 → 3 8 → 16 → 7 5 → 10 → 1 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 2 + 9 + 1 + 6 + 2 + 1 + 0 + 2 + 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 1669825261.

Other Providers at the Same Location


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

Dentist (General Practice)
255 S 17TH ST, STE 1201
PHILADELPHIA, PA 19103
Psychologist (Counseling)
255 S 17TH ST, STE 1111
PHILADELPHIA, PA 19103
Dentist (General Practice)
255 S 17TH ST, STE 1609
PHILADELPHIA, PA 19103
Psychologist
255 S 17TH ST, SUITE 2900
PHILADELPHIA, PA 19103
Psychologist (Clinical)
255 S 17TH ST, SUITE 804
PHILADELPHIA, PA 19103
Psychologist (Clinical)
255 S 17TH ST, SUITE 1111
PHILADELPHIA, PA 19103
Psychologist (Cognitive & Behavioral)
255 S 17TH ST, MEDICAL TOWER - SUITE 2708
PHILADELPHIA, PA 19103
Social Worker (Clinical)
255 S 17TH ST, SUITE 1509
PHILADELPHIA, PA 19103
Psychologist
255 S 17TH ST, 1508 MEDICAL TOWER BUILDING
PHILADELPHIA, PA 19103
Social Worker (Clinical)
255 S 17TH ST, # 1504
PHILADELPHIA, PA 19103
Internal Medicine
255 S 17TH ST, SUITE 300
PHILADELPHIA, PA 19103
Psychiatry & Neurology (Psychiatry)
255 S 17TH ST, SUITE 1905
PHILADELPHIA, PA 19103
Psychologist
255 S 17TH ST, SUITE 1405
PHILADELPHIA, PA 19103
Social Worker (Clinical)
255 S 17TH ST, SUITE 1405
PHILADELPHIA, PA 19103
Specialist
255 S 17TH ST, SUITE 2200
PHILADELPHIA, PA 19103
Dentist (General Practice)
255 S 17TH ST, SUITE 2507
PHILADELPHIA, PA 19103
Psychologist (Counseling)
255 S 17TH ST, SUITE 1405
PHILADELPHIA, PA 19103
Pharmacist
255 S 17TH ST, MEDICAL TOWER PHARMACY
PHILA, PA 19103
Counselor (Professional)
255 S 17TH ST, SUITE 1405
PHILADELPHIA, PA 19103
Social Worker (Clinical)
255 S 17TH ST, SUITE 1405
PHILADELPHIA, PA 19103

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1669825261, enumerated as an "individual" on July 19, 2016.

The provider is located at 255 S 17TH ST STE. 1010 PHILADELPHIA, PA 19103 and the phone number is (484) 474-0353.

Psychologist with taxonomy code 103T00000X.