NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Crystal Sin, OD

Optometrist in Federal Way, WA · enumerated 2023.

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

National Provider Identifier

1861264723

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Crystal Sin
Credential OD
Sex Female
Practice address 1705 S 324th Pl, Federal Way, WA, 98003
Phone (253) 661-6005
Enumeration date Oct 24, 2023
Last updated in NPPES Oct 24, 2023

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OD61491957 (WA) Primary
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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Crystal Sin practice?
The practice location on file with NPPES is in Federal Way, WA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Crystal Sin?
The National Provider Identifier (NPI) for Crystal Sin is 1861264723, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-24.