Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Abby Ann Trettin, O.D.
Optometrist in Hutchinson, MN · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1891283743
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Registry record
Entity type Individual (Type 1)
Name Abby Ann Trettin
Credential O.D.
Sex Female
Practice address 1059 Mn-15, Hutchinson, MN, 55350
Phone (320) 587-4744
Enumeration date Apr 26, 2018
Last updated in NPPES Jul 25, 2019
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
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 Abby Trettin?
Abby Trettin 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.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-07-25.