NPPES file of Aug 9, 2026

Gina D. Gruendeman-Gordon, DDS

Periodontics · Oak Brook, IL

Gina D. Gruendeman-Gordon, DDS is a periodontics with a practice address in Oak Brook, Illinois, and NPI 1730356270, issued on May 14, 2008. Check the license (Illinois 21001479, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1730356270
Name
Gina D. Gruendeman-Gordon
Credential
DDS
Primary taxonomy
Periodontics 1223P0300X
License number
21001479 IL
Self-reported in NPPES; status is on the state search
Practice location
120 Oakbrook Center Mall, Oak Brook, IL 60523
Phone
(630) 368-0605
Enumerated
May 14, 2008
Record last updated
May 14, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(630) 368-9616
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest periodontics records → All 214 in Illinois → Look up another NPI →

Also registered at 120 Oakbrook Center Mall

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Joseph Arredondo, DDSGeneral Practice Dentistry1962655837
  2. Thomas Byrne, MDPsychiatry Physician1225047293

Verify Gina D. Gruendeman-Gordon in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 21001479    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

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64% fewer Medicare Part D claims than the average periodontics in 2024

99 Medicare Part D claims for 48 beneficiaries, against an average of 277 among the 4,191 providers of this specialty who prescribed in Part D.

  1. Gina Gruendeman-Gordon99
  2. Specialty average277

Most prescribed

  1. Amoxicillin50 claims
  2. Chlorhexidine Gluconate26 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Gina D. Gruendeman-Gordon among 214 periodontics records in Illinois

Gina D. Gruendeman-Gordon, DDS is one of 214 periodontics records with a practice address in Illinois. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 64% of them.

  • NPI issued2008 · 64% of these records are older, 27% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileNo · under 1% of these records are
  • Record last updated2008 · 72% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223P0300X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Periodontics providers in Illinois

There are 214 periodontics records in Illinois.

All 214 in Illinois → Every provider in Oak Brook → Periodontics nationwide →

The 8 periodontics records with the nearest ZIP codes

  1. Ryan Johnson, DMDOak Brook, IL 605231447924808
  2. Nolen Levine, D.D.S.Oak Brook, IL 605231497933261
  3. Eugene Buksa, DDS, MSCountryside, IL 605251558546390
  4. Michelle Jennings, DDSCountryside, IL 605251205054541
  5. Amer Atassi, D.M.DBurr Ridge, IL 605271689059297
  6. Justin Villanueva, DMD, MSD, DHLWoodridge, IL 605171174076236
  7. Robert Poulsom, D.D.S., M.S., J.D.Downers Grove, IL 605161689744054
  8. Yahya Sayed Suliman Atassi, DDS, MSDowners Grove, IL 605161639956758

Common questions

What is Gina D. Gruendeman-Gordon, DDS's NPI number?

Gina D. Gruendeman-Gordon, DDS's National Provider Identifier (NPI) is 1730356270, issued on May 14, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Gina D. Gruendeman-Gordon, DDS located?

The NPPES record lists a practice address at 120 Oakbrook Center Mall, Oak Brook, IL, 60523. Phone: (630) 368-0605. Providers update this record themselves, so call before visiting.

How can I verify Gina D. Gruendeman-Gordon, DDS's license?

NPPES lists Illinois license number 21001479, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

How much does Gina D. Gruendeman-Gordon, DDS prescribe under Medicare Part D?

In 2024, Gina D. Gruendeman-Gordon, DDS had 99 Medicare Part D claims for 48 beneficiaries; the average among periodontics prescribers was 277. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.