Dan Patrick O'Brien, DDS
Dan Patrick O'Brien is a Public Health Dentistry provider (Dentist) practicing in Arnold, MO, registered in the NPPES registry with NPI 1598826109 since 2006. The credential DDS stands for Doctor of Dental Surgery.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1598826109 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dan Patrick O'Brien |
| Credential | DDS |
| Sex | Male |
| Practice address | JEFFERSON COUNTY HEALTH DEPARTMENT, 1818 LONEDELL ROAD, Arnold, MO, 63010 |
| Phone | 6362821010 |
| Fax | 6362822525 |
| Enumeration date | 2006-12-13 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223D0001X | Public Health Dentistry | Primary | 010402 | MO |
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 |
|---|---|---|---|
| 010402 | Other | MO | STATE OF MISSOURI LICENSE |
Copy-ready billing details
Provider: Dan O'Brien, DDS NPI: 1598826109 Taxonomy: 1223D0001X (Public Health Dentistry) Address: JEFFERSON COUNTY HEALTH DEPARTMENT, 1818 LONEDELL ROAD, Arnold, MO, 63010
Verify this record
Cross-check NPI 1598826109 against the authoritative CMS record: view Dan Patrick 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 2007-07-08.