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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

JOHN M WALKONIS DDS
NPI 1194762138
Dentist in Saint Charles, MO

Active since May 31, 2006
300 1ST CAPITOL DR, SAINT CHARLES, MO 63301(636) 947-5000(636) 947-5090 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About John M Walkonis Dds NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN M WALKONIS DDS (NPI 1194762138) is an individual dentist in Saint Charles, Missouri, licensed in Missouri (012877) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1194762138
Entity TypeIndividualMale
Primary Taxonomy122300000X
Provider Legal NameJOHN M WALKONISCredential: DDS
Location Address300 1ST CAPITOL DRSaint Charles, MO 63301-2844
Mailing Address1836 Lackland Hill Pkwy, Attn: CredentialingSaint Louis, MO 63146-3572 · (314) 989-0300 · Fax (314) 810-1399
Phone(636) 947-5000
Fax(636) 947-5090
Sole ProprietorNo
Enumeration DateMay 31, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1194762138 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers
Taxonomy Code122300000X
License✔ Licensed in MO · 012877
Definition
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.
300 1ST CAPITOL DR, Saint Charles, MO 63301
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KATHLEEN F. CHRISTLIEB PA
Physician Assistant
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5000
JULIE L ROACH CRNA
Nurse Anesthetist, Certified Registered
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 989-3000
DR. ROMEL IZQUIERDO-MALON M.D.
Internal Medicine
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 317-0600
RACHAEL KING RD
Dietitian, Registered
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5156
ANGELA GLASS MSOTR/L
Occupational Therapist
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5000
FRANK S CALANDRINO JR MD LLC
Internal Medicine (Pulmonary Disease)
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 330-8616
DR. DAVID N MAYWRIGHT PHARMD
Pharmacist
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 541-9482
ANTHONY W JENNINGS M.D.
Emergency Medicine
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Walkonis's NPI number?

The NPI number for John Walkonis is 1194762138. It was assigned to this individual provider in the NPPES registry on May 31, 2006.

Where is John Walkonis located?

John Walkonis practices at 300 1st Capitol Dr, Saint Charles, MO 63301. The listed phone number is (636) 947-5000.

What is John Walkonis's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

When was this NPI record last updated?

The NPPES record for John Walkonis was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.