Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Jennifer K. O'Brien, AU.D., CCC-A
Audiologist in Wauwatosa, WI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598874539
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Registry record
Entity type Individual (Type 1)
Name Dr. Jennifer K. O'Brien
Credential AU.D., CCC-A
Sex Female
Practice address 9000 W Wisconsin Ave Ste 340, Children'S Hospital of Wisconsin, Wauwatosa, WI, 53226
Phone (414) 266-2238
Enumeration date Aug 30, 2006
Last updated in NPPES Oct 23, 2015
Taxonomy & licenses
231H00000X Audiologist Speech, Language and Hearing Service Providers · License 438-156 (WI) Primary
AUD · Doctor of Audiology: A licensed audiologist diagnosing and treating hearing and balance disorders.
About the AUD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 41149000 | Medicaid | WI | - |
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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Jennifer O'Brien?
Jennifer O'Brien is registered in NPPES with the primary taxonomy of Audiologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-10-23.