Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Allison Anne Ruehlen, OD

Optometrist in Castle Rock, CO · enumerated 2019 · practices at Castle Rock Eyewear, Inc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1447818869

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Registry record

Entity type Individual (Type 1)

Name Dr. Allison Anne Ruehlen

Credential OD

Sex Female

Practice address 856 W Happy Canyon Rd Ste 110, Castle Rock, CO, 80108

Phone (303) 663-2034

Fax (303) 663-3428

Enumeration date May 31, 2019

Last updated in NPPES Dec 16, 2025

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 3664 (MN) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License OPT5689 (MA) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 3608-35 (WI) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License OPT.0003498 (CO) Primary

152W00000X Optometrist Eye and Vision Services Providers · License 009957 (NY) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License TPOP185 (FL) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License OEG004129 (PA) Secondary

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.

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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 Allison Ruehlen?

Allison Ruehlen 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.

Other providers at this practice address

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Castle Rock Eyewear, Inc Optometrist · Castle Rock, CO NPI 1740119023

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-16.