MARK WILLIAM POSTHUMUS DDS
NPI 1174726533
Dentist in Grand Rapids, MI

NPI Status: Active since June 06, 2007

Contact Information

2300 3 MILE RD NE
GRAND RAPIDS, MI
ZIP 49505
Phone: (616) 363-3712

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  • Individual
  • Male
  • Dentist

About MARK POSTHUMUS

This page provides the complete NPI Profile along with additional information for Mark Posthumus, a provider established in Grand Rapids, Michigan with a medical specialization in Dentist. The healthcare provider is registered in the NPI registry with number 1174726533 assigned on June 2007. The practitioner's primary taxonomy code is 122300000X with license number 12690 (MI). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI
1174726533
Provider Name
MARK WILLIAM POSTHUMUS DDS
Gender
Male
Entity Type
Individual
Location Address
2300 3 MILE RD NE GRAND RAPIDS, MI 49505
Location Phone
(616) 363-3712
Mailing Address
2300 3 MILE RD NE GRAND RAPIDS, MI 49505
Mailing Phone
(616) 363-3712
Is Sole Proprietor?
No
Enumeration Date
06-06-2007
Last Update Date
07-08-2007
Code Navigator

A dentist like Mark Posthumus 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.
12690
License State
MI
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 1174726533, we treat the final digit (3) 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 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 3).

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
1
Unchanged
Pos 3
7
Doubled → 14 → 1 + 4
Pos 4
4
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
2
Unchanged
Pos 7
6
Doubled → 12 → 1 + 2
Pos 8
5
Unchanged
Pos 9
3
Doubled → 6
Check
3
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 7 → 14 → 5 7 → 14 → 5 6 → 12 → 3 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 1 + 4 + 4 + 1 + 4 + 2 + 1 + 2 + 5 + 6 + 24 = 57

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

The next multiple of ten after 57 is 60. The difference is the calculated check digit.

60 - 57 = 3
This NPI is valid
The calculated check digit is 3, which matches the last digit of 1174726533.

Other Providers at the Same Location


The following 3 providers are registered at the same or a nearby location.

Dentist (General Practice)
2300 3 MILE RD NE
GRAND RAPIDS, MI 49505
Dentist (General Practice)
2300 3 MILE RD NE
GRAND RAPIDS, MI 49505
Clinic/Center (Dental)
2300 3 MILE RD NE
GRAND RAPIDS, MI 49505

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1174726533, enumerated as an "individual" on June 06, 2007.

The provider is located at 2300 3 MILE RD NE GRAND RAPIDS, MI 49505 and the phone number is (616) 363-3712.

Dentist with taxonomy code 122300000X.