ANDREA M. MATTIA DDS LLC
NPI 1396674339
Dentist - Pediatric Dentistry in Old Tappan, NJ
NPI Status: Active since May 15, 2026
Contact Information
175 OLD TAPPAN RD
OLD TAPPAN, NJ
ZIP 07675
Phone: (201) 768-7100
This NPI profile has been added to the NPI registry within the last 30 days.
- Organization
- Dentist
- Pediatric Dentistry
About ANDREA M. MATTIA DDS LLC
This page provides the complete NPI Profile along with additional information for Andrea M. Mattia Dds Llc, a provider established in Old Tappan, New Jersey operating as a Dentist, focusing in pediatric dentistry . The healthcare provider is registered in the NPI registry with number 1396674339 assigned on May 2026. The practitioner's primary taxonomy code is 1223P0221X. The provider is registered as an organization and their NPI record was last updated May 2026. Andrea M. Mattia Dds Llc operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The authorized official of this NPI record is Dr. Andrea M Mattia Dds (Owner)
- NPI
- 1396674339
- Provider Name
- ANDREA M. MATTIA DDS LLC
- Entity Type
- Organization
- Location Address
- 175 OLD TAPPAN RD OLD TAPPAN, NJ 07675
- Location Phone
- (201) 768-7100
- Mailing Address
- 175 OLD TAPPAN RD OLD TAPPAN, NJ 07675
- Mailing Phone
- (201) 768-7100
- Mailing Fax
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 05-15-2026
- Last Update Date
- 05-15-2026
- Code Navigator
A dentist like Andrea M. Mattia Dds Llc is a skilled in and licensed provider that diagnoses and treats problems with patients teeth, gums, and related parts of the mouth. Dentists educate patients on how to take care of the teeth and gums and provide information on diet choices that affect oral health. Dentists must be licensed in the state in which they work.
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
Dentist Pediatric Dentistry
- Taxonomy Code
- 1223P0221X
- Type
- Dental Providers
- Taxonomy Description
- An age-defined specialty that provides both primary and comprehensive preventive and therapeutic oral health care for infants and children through adolescence, including those with special health care needs.
Group Taxonomy 193200000X MULTI-SPECIALTY GROUP
This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.
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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 1396674339, 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 71. The final step is to find the difference between that total and the next multiple of ten (80 - 71 = 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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 71 is 80. The difference is the calculated check digit.
Other Providers at the Same Location
The following 3 providers are registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1396674339, enumerated as an "organization" on May 15, 2026.
The provider is located at 175 OLD TAPPAN RD OLD TAPPAN, NJ 07675 and the phone number is (201) 768-7100.
Dentist with taxonomy code 1223P0221X and a focus in Pediatric Dentistry.
