John J. O'Brien, DDS
John J. O'Brien is a General Practice Dentistry provider (Dentist) practicing in Marshfield, WI, registered in the NPPES registry with NPI 1811208333 since 2010. The credential DDS stands for Doctor of Dental Surgery.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1811208333 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | John J. O'Brien |
| Credential | DDS |
| Sex | Male |
| Practice address | 1307 N SAINT JOSEPH AVE, Marshfield, WI, 54449 |
| Phone | 7152215600 |
| Enumeration date | 2010-06-30 |
| Last updated in NPPES | 2013-06-10 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223G0001X | General Practice Dentistry | Primary | 6543 | WI |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| APPR | Medicaid | WI | — |
Copy-ready billing details
Provider: John O'Brien, DDS NPI: 1811208333 Taxonomy: 1223G0001X (General Practice Dentistry) Address: 1307 N SAINT JOSEPH AVE, Marshfield, WI, 54449
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1437264140 | Family Health Center of Marshfield Inc | Organization | Dental Clinic/Center | Marshfield, WI |
| 1538232541 | Family Health Center of Marshfield, Inc. | Organization | Pharmacy | Marshfield, WI |
| 1477878304 | Tiffany O'Brien | Individual | General Practice Dentistry | Marshfield, WI |
| 1093026791 | Deepak Neelagiri | Individual | General Practice Dentistry | Marshfield, WI |
| 1669757787 | Robert Nichols | Individual | Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist | Marshfield, WI |
| 1164830014 | Aditi Bharatkumar | Individual | Dentist | Marshfield, WI |
| 1750780631 | Deborah Przybylski | Individual | Pharmacist | Marshfield, WI |
| 1548773740 | Family Health Center of Marshfield Inc | Organization | Federally Qualified Health Center (FQHC) | Marshfield, WI |
Verify this record
Cross-check NPI 1811208333 against the authoritative CMS record: view John J. O'Brien on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2013-06-10.