Dr. William J. Kowalski
- Gender: Male
- Sole propriator: No
- NPI: 1114090842
Dr. William J. Kowalski DMD MS
Endodontist
He is located at 1568 Smizer Station Road William J Kowalski Dmd Ms in Fenton, MO 63026. Can help patients with the following: Bad Breath, Bleeding Gums, Dental Exam and Cleaning, Laser, Oral Cancer Examination, Veneers. His National Provider Identifier (NPI) number is 1114090842. Appointment can be made via the phone number (636) 225-2330.
Conditions treated
Dr. William J. Kowalski, being an endodontist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. William J. Kowalski.
- Abscessed Tooth
- Bad Breath
- Bleeding Gums
- Canker Sore
- Cavity
- Cosmetic Dentistry
- Cracked Tooth
- Dental Bridges
- Dental Crowns and Caps
- Dental Emergency
- Dental Exam and Cleaning
- Dental Fillings and Repairs
- Dental Implants
- Dental Malocclusion
- Dental Plaque
- Dental Sealant
- Dentin Hypersensitivity
- Dentures
- Edentulism
- Gum Disease / Gingivitis
- Invisalign
- Laser
- Loose Tooth
- Oral Cancer Examination
- Orthodontic Retainer
- Pericoronitis
- Root Canal
- Sensitive Teeth
- Smile Makeover
- Stained Teeth
- Teeth Grinding
- Teeth Whitening
- Teething
- Temporomandibular Joint Syndrome (TMJ)
- Tongue Problems
- Tooth Extraction
- Tooth Resorption
- Toothache
- Traumatic Dental Injury
- Veneers
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. William J. Kowalski as in-network for the following 2026 plans.
Dental plans
Humana
Network data as of Sep 13, 2026, as reported by the insurer.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Humana Dental Smart Choice - High | PPO · High | Preferred | Accepting new patients |
| Humana Dental Smart Choice - Lite | PPO · Low | Preferred | Accepting new patients |
| Humana Dental Smart Choice - Low | PPO · Low | Preferred | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. William J. Kowalski is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Payments received
Drug payment
| Benco Dental Supply Co | $5950 |
Other
| Other | $5950 |
Additional Specialities
- Dentist
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Questions & Answers
Where can you meet with Dr. William J. Kowalski?
Dr. William J. Kowalski's office is located at 1568 Smizer Station Road William J Kowalski Dmd Ms in Fenton, MO 63026.
What conditions does Dr. William J. Kowalski treat?
Dr. William J. Kowalski provides treatment for Bad Breath, Bleeding Gums, Dental Exam and Cleaning, Laser, Oral Cancer Examination, Veneers. For the full list see this list.
Does Dr. William J. Kowalski accept insurance?
Dr. William J. Kowalski is listed in-network for 3 ACA Marketplace (Obamacare/HealthCare.gov) plans from Humana. See the Marketplace plans section for details.