Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ryan Tam, DDS

Dentist in Mercer Island, WA · enumerated 2020 · practices at Goichi Shiotsu DDS P S.

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

National Provider Identifier

1740807577

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Registry record

Entity type Individual (Type 1)

Name Dr. Ryan Tam

Credential DDS

Sex Male

Practice address 2825 80th Ave Se Ste 3, Mercer Island, WA, 98040

Phone (206) 232-3600

Enumeration date Jun 27, 2020

Last updated in NPPES Jun 27, 2020

Taxonomy & licenses

122300000X Dentist Dental Providers · License 0000000000 (WA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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

Is NPI 1740807577 active?

Yes, as of the latest NPPES snapshot, NPI 1740807577 is active (record last updated 2020-06-27).

How do I verify Ryan Tam's NPI record?

Cross-check NPI 1740807577 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Goichi Shiotsu Prosthodontics · Mercer Island, WA NPI 1710073747 Goichi Shiotsu DDS P S Dentist · Mercer Island, WA NPI 1649724220

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-06-27.