Sidney L I Cassell, MD
Rheumatology Physician · Eugene, OR
Sidney L I Cassell, MD is a rheumatology physician with a practice address in Eugene, Oregon, and NPI 1376614107, issued on Nov 13, 2006. Check the license (Oregon MD11360, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Sidney L I Cassell
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- MD11360 OR
Self-reported in NPPES; status is on the state search - Practice location
- 132 E Broadway, Eugene, OR 97401
- Phone
- (541) 687-0816
- Enumerated
- Nov 13, 2006
- Record last updated
- Jul 13, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (541) 687-1086
- Medicaid ID
- 005785 OR
- Medicare enrollment
- Enrolled (PECOS I20100813000198); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 1971
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 101 in Oregon → Look up another NPI →
Also registered at 132 E Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Matthew Dillender, LMTMassage Therapist1467882068
Verify Sidney L I Cassell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD11360Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average rheumatology physician in 2024
19 Medicare Part D claims, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Bills Medicare through one group practice
- Drs Cassell And Boren PCEugene, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sidney L I Cassell among 101 rheumatology physician records in Oregon
Sidney L I Cassell, MD is one of 101 rheumatology physician records with a practice address in Oregon. 73% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 50% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1971 · median 2004 among the 65 with a school on file
- Record last updated2010 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Oregon
There are 101 rheumatology physician records in Oregon.
All 101 in Oregon → Every provider in Eugene → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Simona Braun, MDEugene, OR 974011972677045
- Sarah CassellEugene, OR 974011093724247
- Norman Hudson, MDEugene, OR 974011053427666
- William Maier, MDEugene, OR 974011790735561
- Hesham Elmergawy, M.DEugene, OR 974021811246176
- Diman Lamichhane, MDEugene, OR 974021700067360
- Gary Wheeler, MDRoseburg, OR 974711790767234
- Mary Abraham, MDCorvallis, OR 973301073876199
Common questions
What is Sidney L I Cassell, MD's NPI number?
Sidney L I Cassell, MD's National Provider Identifier (NPI) is 1376614107, issued on Nov 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sidney L I Cassell, MD located?
The NPPES record lists a practice address at 132 E Broadway, Eugene, OR, 97401. Phone: (541) 687-0816. Providers update this record themselves, so call before visiting.
How can I verify Sidney L I Cassell, MD's license?
NPPES lists Oregon license number MD11360, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sidney L I Cassell, MD prescribe under Medicare Part D?
In 2024, Sidney L I Cassell, MD had 19 Medicare Part D claims; the average among rheumatology physician prescribers was 1,978. 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.