Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Cynthia Ann Sonnenberg, AU.D.
Audiologist in Napoleon, OH · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1801846050
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Registry record
Entity type Individual (Type 1)
Name Dr. Cynthia Ann Sonnenberg
Credential AU.D.
Sex Female
Practice address 1411 Scott St, Suite B, Napoleon, OH, 43545
Phone (419) 592-0338
Fax (419) 592-0255
Enumeration date May 10, 2006
Last updated in NPPES Dec 18, 2012
Taxonomy & licenses
231H00000X Audiologist Speech, Language and Hearing Service Providers · License A-01161 (OH) Primary
AUD · Doctor of Audiology: A licensed audiologist diagnosing and treating hearing and balance disorders.
About the AUD credential
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
What specialty is Cynthia Sonnenberg?
Cynthia Sonnenberg 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.
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.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-12-18.