Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Katherine Chia-Hsin Yang-Williams, O.D
Optometrist in Seattle, WA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1699774844
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Katherine Chia-Hsin Yang-Williams
Credential O.D
Sex Female
Practice address 7001 Roosevelt Way Ne, Seattle, WA, 98115
Phone (206) 527-2987
Fax (206) 526-8076
Enumeration date Jul 19, 2005
Last updated in NPPES May 1, 2019
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 2020865 | Medicaid | WA | - |
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
How do I verify Katherine Yang-Williams's NPI record?
Cross-check NPI 1699774844 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1699774844 active?
Yes, as of the latest NPPES snapshot, NPI 1699774844 is active (record last updated 2019-05-01).
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-05-01.