DR. MARK S ROISMAN D.M.D.
NPI 1003947425
Dentist in Westport, CT

NPI Status: Active since March 08, 2007

Contact Information

225 MAIN ST
SUITE #304
WESTPORT, CT
ZIP 06880
Phone: (203) 227-6338

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  • Individual
  • Male
  • Dentist

About MARK ROISMAN

This page provides the complete NPI Profile along with additional information for Mark Roisman, a provider established in Westport, Connecticut with a medical specialization in Dentist. The healthcare provider is registered in the NPI registry with number 1003947425 assigned on March 2007. The practitioner's primary taxonomy code is 122300000X with license number 008100 (CT). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI
1003947425
Provider Name
DR. MARK S ROISMAN D.M.D.
Gender
Male
Entity Type
Individual
Location Address
225 MAIN ST SUITE #304 WESTPORT, CT 06880
Location Phone
(203) 227-6338
Mailing Address
225 MAIN ST SUITE #304 WESTPORT, CT 06880
Mailing Phone
(203) 227-6338
Is Sole Proprietor?
Yes
Enumeration Date
03-08-2007
Last Update Date
07-08-2007
Code Navigator

A dentist like Mark Roisman 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

Taxonomy Code
122300000X
Type
Dental Providers
License No.
008100
License State
CT
Taxonomy Description
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.

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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 1003947425, we treat the final digit (5) 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 55. The final step is to find the difference between that total and the next multiple of ten (60 - 55 = 5).

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
0
Unchanged
Pos 3
0
Doubled → 0
Pos 4
3
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
4
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
4
Unchanged
Pos 9
2
Doubled → 4
Check
5
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 0 → 0 9 → 18 → 9 7 → 14 → 5 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 0 + 3 + 1 + 8 + 4 + 1 + 4 + 4 + 4 + 24 = 55

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

The next multiple of ten after 55 is 60. The difference is the calculated check digit.

60 - 55 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1003947425.

Other Providers at the Same Location


The following 13 providers are registered at the same or a nearby location.

Counselor (Professional)
225 MAIN ST, LL1
WESTPORT, CT 06880
Psychiatry & Neurology (Psychiatry)
225 MAIN ST, L-1
WESTPORT, CT 06880
Internal Medicine
225 MAIN ST
WESTPORT, CT 06880
Chiropractor (Rehabilitation)
225 MAIN ST
WESTPORT, CT 06880
Advanced Practice Midwife
225 MAIN ST, SUITE 204
WESTPORT, CT 06880
Marriage & Family Therapist
225 MAIN ST
WESTPORT, CT 06880
Internal Medicine
225 MAIN ST
WESTPORT, CT 06880
Chiropractor
225 MAIN ST, SUITE 204
WESTPORT, CT 06880
Social Worker (Clinical)
225 MAIN ST, # 1
WESTPORT, CT 06880
Internal Medicine
225 MAIN ST, SUITE 101
WESTPORT, CT 06880
Psychiatry & Neurology (Psychiatry)
225 MAIN ST
WESTPORT, CT 06880
Obstetrics & Gynecology (Reproductive Endocrinology)
225 MAIN ST
WESTPORT, CT 06880
Psychiatry & Neurology (Child & Adolescent Psychiatry)
225 MAIN ST, LOWER LEVEL, SUITE L-1
WESTPORT, CT 06880

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1003947425, enumerated as an "individual" on March 08, 2007.

The provider is located at 225 MAIN ST SUITE #304 WESTPORT, CT 06880 and the phone number is (203) 227-6338.

Dentist with taxonomy code 122300000X.