David Cassius, M.D.
Pain Medicine (Physical Medicine & Rehabilitation) Physician · Seattle, WA
David Cassius, M.D. is a pain medicine (physical medicine & rehabilitation) physician with a practice address in Seattle, Washington, and NPI 1194884940, issued on Dec 7, 2006. Check the license (Washington MD00037363, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- David Cassius
- Credential
- M.D.
- Primary taxonomy
- Pain Medicine (Physical Medicine & Rehabilitation) Physician 2081P2900X
- License number
- MD00037363 WA
Self-reported in NPPES; status is on the state search - Practice location
- 600 Broadway, Seattle, WA 98122
- Phone
- (206) 624-9876
- Enumerated
- Dec 7, 2006
- Record last updated
- Oct 14, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (206) 215-2289
- Medicare enrollment
- Enrolled (PECOS I20051007000570); may accept Medicare assignment
- Medical or professional school
- Meharry Medical College School Of Medicine, 1991
- Entity
- Type 1 · individual
8 nearest pain medicine (physical medicine & rehabilitation) physician records → All 39 in Washington → Look up another NPI →
Also registered at 600 Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Julianna Astaire, MSWClinical Social Worker1801294624
- Gayoung BaeMental Health Counselor1992224810
- Anne Baldwin, LMHCMental Health Counselor1205973443
- Victor Barry, D.D.SGeneral Practice Dentistry1164574919
Verify David Cassius in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00037363Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average pain medicine (physical medicine & rehabilitation) physician in 2024
87 Medicare Part D claims for 19 beneficiaries, against an average of 1,479 among the 1,457 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Nortriptyline Hcl27 claims
- Levothyroxine Sodium17 claims
- Liothyronine Sodium13 claims
- Levoxyl12 claims
- Amitriptyline Hcl11 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.
David Cassius among 39 pain medicine (physical medicine & rehabilitation) physician records in Washington
David Cassius, M.D. is one of 39 pain medicine (physical medicine & rehabilitation) physician records with a practice address in Washington. 72% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1991 · median 2010 among the 24 with a school on file
- Record last updated2007 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2081P2900X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pain Medicine (Physical Medicine & Rehabilitation) Physician providers in Washington
There are 39 pain medicine (physical medicine & rehabilitation) physician records in Washington.
All 39 in Washington → Every provider in Seattle → Pain Medicine (Physical Medicine & Rehabilitation) Physician nationwide →
The 8 pain medicine (physical medicine & rehabilitation) physician records with the nearest ZIP codes
- Glen David, MDSeattle, WA 981221639285182
- Joel Konikow, MDSeattle, WA 981221215007091
- Paul Sueno, MDSeattle, WA 981121396948956
- Xiangping Ren, MDSeattle, WA 981041023173846
- Steven Stanos, DOSeattle, WA 981041053329615
- Mark Tomski, M.D.Seattle, WA 981041629187687
- Antoine Jones, M.D.Seattle, WA 981011679667331
- Daniel Oh, M.D., M.S.Renton, WA 980551215462361
Common questions
What is David Cassius, M.D.'s NPI number?
David Cassius, M.D.'s National Provider Identifier (NPI) is 1194884940, issued on Dec 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Cassius, M.D. located?
The NPPES record lists a practice address at 600 Broadway, Seattle, WA, 98122. Phone: (206) 624-9876. Providers update this record themselves, so call before visiting.
How can I verify David Cassius, M.D.'s license?
NPPES lists Washington license number MD00037363, 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 David Cassius, M.D. prescribe under Medicare Part D?
In 2024, David Cassius, M.D. had 87 Medicare Part D claims for 19 beneficiaries; the average among pain medicine (physical medicine & rehabilitation) physician prescribers was 1,479. 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.