MR. MARK JOSEPH DEMAREST LPC
NPI 1548352081
Counselor - Mental Health in Roseland, NJ

NPI Status: Active since September 29, 2006

Contact Information

101 EISENHOWER PKWY
SUITE 300
ROSELAND, NJ
ZIP 07068
Phone: (973) 986-3998

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

Individual
Male
Counselor
Mental Health

About MARK DEMAREST

This page provides the complete NPI Profile along with additional information for Mark Demarest, a provider established in Roseland, New Jersey with a medical specialization in Counselor, focusing in mental health . The healthcare provider is registered in the NPI registry with number 1548352081 assigned on September 2006. The practitioner's primary taxonomy code is 101YM0800X with license number 37PC00313600 (NJ). The provider is registered as an individual and his NPI record was last updated 12 years ago.

NPI: 1548352081
Provider Name: MR. MARK JOSEPH DEMAREST LPC
Gender: Male
Entity Type: Individual
Location Address: 101 EISENHOWER PKWY SUITE 300 ROSELAND, NJ 07068
Location Phone: (973) 986-3998
Mailing Address: 101 EISENHOWER PKWY SUITE 300 ROSELAND, NJ 07068
Mailing Phone: (973) 986-3998
Is Sole Proprietor?: Yes
Enumeration Date: 09-29-2006
Last Update Date: 10-21-2014
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A mental health counselor like Mark Demarest provides treatment to individuals, families, couples, and groups for mental and emotional health issues and relationship problems. Mental health counselors treat clients with a variety of conditions, including anxiety, depression, grief, low self-esteem, stress, and suicidal impulses.

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: Counselor Mental Health
Taxonomy Code: 101YM0800X
Type: Behavioral Health & Social Service Providers
License No.: 37PC00313600
License State: NJ

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 1548352081, 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 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 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 → 8

Pos 4

Unchanged

Pos 5

Doubled → 6

Pos 6

Unchanged

Pos 7

Doubled → 4

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 6

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 4 → 8 3 → 6 2 → 4 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 8 + 8 + 6 + 5 + 4 + 0 + 1 + 6 + 24 = 69

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

The next multiple of ten after 69 is 70. The difference is the calculated check digit.

70 - 69 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1548352081.