Dr. John J. O\'Brien DDS
Dentist
He is located at 1307 North Saint Joseph Avenue in Marshfield, WI 54449. Can help patients with the following: Bleeding Gums, Dental Emergency, Dental Malocclusion, Dentures, Gum Disease / Gingivitis, Teeth Grinding. His National Provider Identifier (NPI) number is 1811208333. Appointment can be made via the phone number (715) 221-5600. He is affiliated with 1 practices.
Conditions treated
John J. O'Brien, being an dentist, 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. John J. O\'Brien.
- Bleeding Gums
- Cosmetic Dentistry
- Dental Bridges
- Dental Crowns and Caps
- Dental Emergency
- Dental Exam and Cleaning
- Dental Implants
- Dental Malocclusion
- Dentin Hypersensitivity
- Dentures
- Gum Disease / Gingivitis
- Invisalign
- Laser
- Oral Cancer Examination
- Pericoronitis
- Teeth Grinding
- Teeth Whitening
- Veneers
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. John J. O\'Brien 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 | PPO · Low | Preferred | Accepting new patients |
Renaissance Dental
Network data as of Sep 16, 2026, as reported by the insurer.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Wisconsin Preferred Plan | PPO · Low | Preferred | Accepting new patients |
| Wisconsin Preferred Plan (Pediatric Only) | PPO · Low | Preferred | Accepting new patients |
| Wisconsin Wellness Essentials | 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. John J. O\'Brien is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. John J. O\'Brien is enrolled to bill Medicare as a Order And Referring Only - Oral Surgery (also registered under: Practitioner - Oral Surgery) .
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| Dentsply | $10 |
Other
| Food and Beverage | $11 |
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- Address: 1307 North Saint Joseph Avenue Marshfield, 54449, WI
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- Address: 306 West Mcmillan Street Marshfield, 54449, WI
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- Address: 306 West Mcmillan Street Marshfield, 54449, WI
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- Gender: Male
- Address: 306 West Mcmillan Street Marshfield, 54449, WI
- Gender: Female
- Address: 1307 North Saint Joseph Avenue Marshfield, 54449, WI
Questions & Answers
Where can you meet with John J. O'Brien?
John J. O'Brien's office is located at 1307 North Saint Joseph Avenue in Marshfield, WI 54449.
What conditions does John J. O'Brien treat?
John J. O'Brien provides treatment for Bleeding Gums, Dental Emergency, Dental Malocclusion, Dentures, Gum Disease / Gingivitis, Teeth Grinding. For the full list see this list.
Does John J. O'Brien have affiliation with practices?
John J. O'Brien is affiliated with FHC Marshfield Dental Center Dme.
Does John J. O'Brien accept insurance?
John J. O'Brien is listed in-network for 4 ACA Marketplace (Obamacare/HealthCare.gov) plans from Humana, Renaissance Dental. See the Marketplace plans section for details.