Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Joan Ploem Miller, OD
Optometrist in Hillsboro, OR · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1194882704
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Registry record
Entity type Individual (Type 1)
Name Dr. Joan Ploem Miller
Credential OD
Sex Female
Practice address 527 Se Baseline St, Ste B, Hillsboro, OR, 97123
Phone (503) 648-8328
Fax (503) 648-8378
Enumeration date Jan 2, 2007
Last updated in NPPES Nov 12, 2008
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 Joan Miller?
Joan Miller 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
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-11-12.