DR. MARK DAVID HASSAN PH.D.
NPI 1013093459
Psychologist - Psychoanalysis in Alhambra, CA

NPI Status: Active since October 28, 2006

Contact Information

1961 W HUNTINGTON DR STE 202
ALHAMBRA, CA
ZIP 91801
Phone: (626) 458-5444
Fax: (626) 458-0679

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

Individual
Male
Psychologist
Psychoanalysis

About MARK HASSAN

This page provides the complete NPI Profile along with additional information for Mark Hassan, a provider established in Alhambra, California with a medical specialization in Psychologist, focusing in psychoanalysis . The healthcare provider is registered in the NPI registry with number 1013093459 assigned on October 2006. The practitioner's primary taxonomy code is 103TP0814X with license number PSY 5298 (CA). The provider is registered as an individual and his NPI record was last updated 17 years ago.

NPI: 1013093459
Provider Name: DR. MARK DAVID HASSAN PH.D.
Gender: Male
Entity Type: Individual
Location Address: 1961 W HUNTINGTON DR STE 202 ALHAMBRA, CA 91801
Location Phone: (626) 458-5444
Location Fax: (626) 458-0679
Mailing Address: 1961 W HUNTINGTON DR STE 202 ALHAMBRA, CA 91801
Mailing Phone: (626) 458-5444
Mailing Fax: (626) 458-0679
Is Sole Proprietor?: No
Enumeration Date: 10-28-2006
Last Update Date: 09-21-2009
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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 Psychoanalysis
Taxonomy Code: 103TP0814X
Type: Behavioral Health & Social Service Providers
License No.: PSY 5298
License State: CA
Taxonomy Description: A psychologist whose specialty is distinguished from other specialties by its body of knowledge and its intensive treatment approaches. It aims at structural changes and modifications of a person's personality. Psychoanalysis promotes awareness of unconscious, maladaptive and habitually recurrent patterns of emotion and behavior, allowing previously unconscious aspects of the self to become integrated and promoting optimal functioning, healing and creative expression.

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 1013093459, 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 2

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 0

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 1 → 2 0 → 0 3 → 6 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 2 + 3 + 0 + 9 + 6 + 4 + 1 + 0 + 24 = 51

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

The next multiple of ten after 51 is 60. The difference is the calculated check digit.

60 - 51 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1013093459.