What is Mark Posthumus's NPI number?

Mark Posthumus's National Provider Identifier (NPI) is 1174726533, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Posthumus's specialty?

Mark Posthumus is listed in the NPPES registry with a primary specialty of Dentist (Dental Providers).

Where is Mark Posthumus located?

Mark Posthumus's practice location on file with NPPES is 2300 3 Mile Rd Ne, Grand Rapids, MI 49505-3956.

What is Mark Posthumus's phone number?

The practice phone number listed in the NPPES registry for Mark Posthumus is (616) 363-3712.

Is Mark Posthumus's NPI active?

Yes — Mark Posthumus's NPI (1174726533) is active in the NPPES registry as of the last update on 2007-07-08.

IndividualActive

Mark Posthumus, DDS

NPI 1174726533 · Dentist · Grand Rapids, MI

Mark Posthumus, DDS is a Dentist provider in Grand Rapids, MI (NPI 1174726533).

Provider details

NPI number: 1174726533
Entity type: Individual
Primary specialty: DentistDental Providers
Credential: DDS
Sex: Male
Sole proprietor: No
License: 12690 (MI)

Practice location

2300 3 Mile Rd Ne

Grand Rapids, MI 49505-3956

Phone: (616) 363-3712

Approximate (ZIP-level) locationGet directions

More MI providers

Mailing address

2300 3 Mile Rd Ne

Grand Rapids, MI 49505-3956

Specialties & taxonomies

DentistPrimary122300000XLicense 12690 (MI)
Dental Providers

Profile Score

Detailed profile(90/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
19 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Enumerated: 2007-06-06
Last updated: 2007-07-08

Frequently asked questions

What is Mark Posthumus's NPI number?: Mark Posthumus's National Provider Identifier (NPI) is 1174726533, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Mark Posthumus's specialty?: Mark Posthumus is listed in the NPPES registry with a primary specialty of Dentist (Dental Providers).
Where is Mark Posthumus located?: Mark Posthumus's practice location on file with NPPES is 2300 3 Mile Rd Ne, Grand Rapids, MI 49505-3956.
What is Mark Posthumus's phone number?: The practice phone number listed in the NPPES registry for Mark Posthumus is (616) 363-3712.
Is Mark Posthumus's NPI active?: Yes — Mark Posthumus's NPI (1174726533) is active in the NPPES registry as of the last update on 2007-07-08.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions