Geoffrey Chan, D.D.S.
General Practice Dentistry · Sammamish, WA
Geoffrey Chan, D.D.S. is a general practice dentistry with a practice address in Sammamish, Washington, and NPI 1689891756, issued on Apr 19, 2007. Check the license (Washington DE10241, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Geoffrey Chan
- Credential
- D.D.S.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- DE10241 WA
Self-reported in NPPES; status is on the state search - Practice location
- 22725 SE 29TH St, Sammamish, WA 98075
- Phone
- (425) 391-5511
- Enumerated
- Apr 19, 2007
- Record last updated
- Jul 8, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (425) 391-4923
- Entity
- Type 1 · individual
Verify Geoffrey Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license DE10241Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average general practice dentistry in 2024
20 Medicare Part D claims, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Chlorhexidine Gluconate12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
11 general practice dentistry records list a practice address in Sammamish
They are 11 of the 398 NPPES records with a practice address in Sammamish, and 3,196 general practice dentistry records in Washington.
All 11 in Sammamish → All 3,196 in Washington → Every provider in Sammamish →
Other general practice dentistry records in Washington
- Royal Aaby, DDSSilverdale, WA1487775912
- Sara AbdelhaiAuburn, WA1912745928
- David Abdo, D.D.SArlington, WA1215022199
- Megan Abdo, DDSBellingham, WA1750993911
- Susan Abdun-Nur, DDSBellevue, WA1497778872
- Norman Abe, DDSSeattle, WA1699852590
- Parvin Abedi, DDSTacoma, WA1467516310
- Larry Abell, DDSInchelium, WA1609913144
- Jeffrey Abolofia, DDSBurien, WA1386629657
- Greg Achtemichuk, DDSMukilteo, WA1780767533
Common questions
What is Geoffrey Chan, D.D.S.'s NPI number?
Geoffrey Chan, D.D.S.'s National Provider Identifier (NPI) is 1689891756, issued on Apr 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Geoffrey Chan, D.D.S. located?
The NPPES record lists a practice address at 22725 SE 29TH St, Sammamish, WA, 98075. Phone: (425) 391-5511. Providers update this record themselves, so call before visiting.
How can I verify Geoffrey Chan, D.D.S.'s license?
NPPES lists Washington license number DE10241, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Geoffrey Chan, D.D.S. prescribe under Medicare Part D?
In 2024, Geoffrey Chan, D.D.S. had 20 Medicare Part D claims; the average among general practice dentistry prescribers was 83. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.