Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Joni Ruth Breuer, O.D.
Optometrist in Spencer, IA · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1083925572
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Registry record
Entity type Individual (Type 1)
Name Joni Ruth Breuer
Credential O.D.
Sex Female
Practice address 714 S Grand Ave, Spencer, IA, 51301
Phone (712) 262-3982
Fax (712) 262-7831
Enumeration date Jun 29, 2010
Last updated in NPPES Jul 29, 2020
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD 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 Joni Breuer?
Joni Breuer is registered in NPPES with the primary taxonomy of Optometrist. 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.
Other providers at this practice address
Browse all → Pbr Inc Durable Medical Equipment & Medical Supplies · Spencer, IA NPI 1790723237 Cheryl Bronner Optometrist · Spencer, IA NPI 1194758581 Dennis Taylor Optometrist · Spencer, IA NPI 1437203031 Tkc Optical, Inc. Eyewear Supplier · Spencer, IA NPI 1669526299 Jessica Curran Optometrist · Spencer, IA NPI 1205036993 Breuer Eye Care Optometrist · Spencer, IA NPI 1346645587
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-29.