Mark W. An, D.D.S.
General Practice Dentistry · Mukilteo, WA
Mark W. An, D.D.S. is a general practice dentistry with a practice address in Mukilteo, Washington, and NPI 1437200854, issued on Jan 13, 2007. Check the license (Washington DE00010456, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark W. An
- Credential
- D.D.S.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- DE00010456 WA
Self-reported in NPPES; status is on the state search - Practice location
- 11811 Mukilteo Speedway, Mukilteo, WA 98275
- Phone
- (425) 267-9900
- Enumerated
- Jan 13, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (425) 267-9901
- Medicaid ID
- 5050968 WA
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 3,196 in Washington → Look up another NPI →
Also registered at 11811 Mukilteo Speedway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark W. An in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license DE00010456Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% more Medicare Part D claims than the average general practice dentistry in 2024
145 Medicare Part D claims for 93 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin106 claims
- Ibuprofen23 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.
Mark W. An among 3,196 general practice dentistry records in Washington
Mark W. An, D.D.S. is one of 3,196 general practice dentistry records with a practice address in Washington. 57% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 37% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 72% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 general practice dentistry records list a practice address in Mukilteo
They are 15 of the 430 NPPES records with a practice address in Mukilteo, and 3,196 general practice dentistry records in Washington.
All 3,196 in Washington → Every provider in Mukilteo → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Greg Achtemichuk, DDSMukilteo, WA 982751780767533
- Anna Beers, DMDMukilteo, WA 982751558036947
- Darrell Cline, DDSMukilteo, WA 982751225111867
- Greg Fjeran, DDSMukilteo, WA 982751659300630
- Teresa Holzer, DDSMukilteo, WA 982751922116706
- Kristopher Johnson, DDSMukilteo, WA 982751790736825
- Tiffany Luu-Tran, D.D.S.Mukilteo, WA 982751508308594
- Kathryn Onishi, DDSMukilteo, WA 982751407079841
Common questions
What is Mark W. An, D.D.S.'s NPI number?
Mark W. An, D.D.S.'s National Provider Identifier (NPI) is 1437200854, issued on Jan 13, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark W. An, D.D.S. located?
The NPPES record lists a practice address at 11811 Mukilteo Speedway, Mukilteo, WA, 98275. Phone: (425) 267-9900. Providers update this record themselves, so call before visiting.
How can I verify Mark W. An, D.D.S.'s license?
NPPES lists Washington license number DE00010456, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Mark W. An, D.D.S. prescribe under Medicare Part D?
In 2024, Mark W. An, D.D.S. had 145 Medicare Part D claims for 93 beneficiaries; 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.