Maria Vasilyadis
Emergency Medicine Physician · Seattle, WA
Maria Vasilyadis is an emergency medicine physician with a practice address in Seattle, Washington, and NPI 1659565836, issued on Aug 30, 2007. Check the license (Washington MD60099731, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Maria Vasilyadis
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- MD60099731 WA
245281 NY
Self-reported in NPPES; status is on the state search - Practice location
- 925 Seneca St, Seattle, WA 98101
- Phone
- (206) 583-6433
- Enumerated
- Aug 30, 2007
- Record last updated
- Dec 28, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid ID
- 8553638 WA
- Medicare enrollment
- Enrolled (PECOS I20090930000351); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,459 in Washington → Look up another NPI →
Also registered at 925 Seneca St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jonathan Abe, MDInternal Medicine Physician1346090875
- Katherine Adler, MDInternal Medicine Physician1841418886
- Sanjhavi AgarwalStudent in an Organized Health Care Education/Training Program1902410053
- Jason Agtarap, MDStudent in an Organized Health Care Education/Training Program1194576181
- Shani AharonStudent in an Organized Health Care Education/Training Program1316526650
- Mohammad Ahmed, DOHospitalist Physician1063819381
Verify Maria Vasilyadis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60099731Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average emergency medicine physician in 2024
37 Medicare Part D claims for 29 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
One hospital affiliation
- Virginia Mason Medical CenterSeattle, WA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Maria Vasilyadis among 1,459 emergency medicine physician records in Washington
Maria Vasilyadis is one of 1,459 emergency medicine physician records with a practice address in Washington. 74% 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 45% of them.
- NPI issued2007 · 45% of these records are older, 44% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2004 · median 2010 among the 851 with a school on file
- Record last updated2009 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Washington
There are 1,459 emergency medicine physician records in Washington.
All 1,459 in Washington → Every provider in Seattle → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Joseph Bohonos, MDSeattle, WA 981011497792741
- David Dabell, MDSeattle, WA 981011295844231
- David Frank, MDSeattle, WA 981011497774723
- Marina Furtado, MDSeattle, WA 981011568572410
- Joseph Gifford, MDSeattle, WA 981011477729283
- Jacob Heller, MDSeattle, WA 981011598789505
- G Johnson, MDSeattle, WA 981011154370526
- John Lacambra, MDSeattle, WA 981011043312614
Common questions
What is Maria Vasilyadis's NPI number?
Maria Vasilyadis's National Provider Identifier (NPI) is 1659565836, issued on Aug 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Maria Vasilyadis located?
The NPPES record lists a practice address at 925 Seneca St, Seattle, WA, 98101. Phone: (206) 583-6433. Providers update this record themselves, so call before visiting.
How can I verify Maria Vasilyadis's license?
NPPES lists Washington license number MD60099731, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Maria Vasilyadis prescribe under Medicare Part D?
In 2024, Maria Vasilyadis had 37 Medicare Part D claims for 29 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.