William Joseph Kellner, MD
William Joseph Kellner is a Pediatrics Physician provider (Pediatrics) practicing in De Pere, WI, registered in the NPPES registry with NPI 1841274693 since 2005. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1841274693 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | William Joseph Kellner |
| Credential | MD |
| Sex | Male |
| Practice address | 555 REDBIRD CIR, De Pere, WI, 54115 |
| Phone | 9203386820 |
| Enumeration date | 2005-12-05 |
| Last updated in NPPES | 2014-03-14 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208000000X | Pediatrics Physician | Primary | 23105 | WI |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 23105 | Other | WI | LICENSE |
Copy-ready billing details
Provider: William Kellner, MD NPI: 1841274693 Taxonomy: 208000000X (Pediatrics Physician) Address: 555 REDBIRD CIR, De Pere, WI, 54115
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1003890864 | Bozena Biernat | Individual | Internal Medicine Physician | De Pere, WI |
| 1619951498 | Karen Camilli | Individual | Pediatrics Physician | De Pere, WI |
| 1629052469 | Sherri Hoyman | Individual | Pediatrics Physician | De Pere, WI |
| 1427032069 | Steven Novotny | Individual | Family Medicine Physician | De Pere, WI |
| 1780646513 | Bellin Memorial Hospital Inc | Organization | Family Medicine Physician | De Pere, WI |
| 1235192592 | Bellin Memorial Hospital Inc | Organization | Pediatrics Physician | De Pere, WI |
| 1144283318 | Bellin Psychiatric Center Inc | Organization | Mental Health Clinic/Center (Including Community Mental Health Center) | De Pere, WI |
| 1467405589 | Green Bay Allergy,Asthma & Immunology Sc | Organization | Internal Medicine Physician | De Pere, WI |
Verify this record
Cross-check NPI 1841274693 against the authoritative CMS record: view William Joseph Kellner 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
Where does William Kellner practice?
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2014-03-14.