Mary L. Dion, MD
Anesthesiology Physician · Seattle, WA
Mary L. Dion, MD is an anesthesiology physician with a practice address in Seattle, Washington, and NPI 1225001290, issued on Feb 9, 2006. Check the license (Washington MD00019339, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Mary L. Dion
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- MD00019339 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 9TH Ave, Seattle, WA 98101
- Phone
- (206) 223-6600
- Enumerated
- Feb 9, 2006
- Record last updated
- Nov 15, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 8343709 WA
- Medicare enrollment
- Enrolled (PECOS I20050202000432); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 1975
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,701 in Washington → Look up another NPI →
Also registered at 1100 9TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary L. Dion in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00019339Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $53.70
1 payment: food and beverage; the largest payer was Avanos Medical. The 17,774 providers of this specialty with any payment received $669.59 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Matrix Anesthesia, PSBellevue, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary L. Dion among 1,701 anesthesiology physician records in Washington
Mary L. Dion, MD is one of 1,701 anesthesiology physician records with a practice address in Washington. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 55% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1975 · median 2007 among the 1,103 with a school on file
- Record last updated2011 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
694 anesthesiology physician records list a practice address in Seattle
They are 694 of the 41,956 NPPES records with a practice address in Seattle, and 1,701 anesthesiology physician records in Washington.
All 1,701 in Washington → Every provider in Seattle → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Wendy Carlyle, MDSeattle, WA 981011902879943
- Lisa Chinlund, ARNPSeattle, WA 981011326011644
- Clarence Chong, CRNASeattle, WA 981011669445995
- Patricia Cone, MDSeattle, WA 981011467425413
- Ronald Erb, CRNASeattle, WA 981011972570463
- Raymond Joseph, MDSeattle, WA 981011013980846
- Joseph Neal, MDSeattle, WA 981011700852365
- Susan Nelson, MDSeattle, WA 981011881668960
Common questions
What is Mary L. Dion, MD's NPI number?
Mary L. Dion, MD's National Provider Identifier (NPI) is 1225001290, issued on Feb 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary L. Dion, MD located?
The NPPES record lists a practice address at 1100 9TH Ave, Seattle, WA, 98101. Phone: (206) 223-6600. Providers update this record themselves, so call before visiting.
How can I verify Mary L. Dion, MD's license?
NPPES lists Washington license number MD00019339, 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.
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.