Spencer Joseph Marsden, PA-C
Physician Assistant · Nyssa, OR
Spencer Joseph Marsden, PA-C is a physician assistant with a practice address in Nyssa, Oregon, and NPI 1881165470, issued on Dec 8, 2018. Check the license (Oregon PA191063, as entered in NPPES) with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Spencer Joseph Marsden
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- PA191063 OR
PA1692 ID
Self-reported in NPPES; status is on the state search - Practice location
- 17 N 6TH St, Nyssa, OR 97913
- Phone
- (541) 372-2606
- Enumerated
- Dec 8, 2018
- Record last updated
- Jan 14, 2026
- Medicaid ID
- 500756900 OR
- Medicare enrollment
- Enrolled (PECOS I20250728001944); accepts Medicare assignment
- Medical or professional school
- Des Moines University Of Osteopathic Medicine And Health Sciences, 2018
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 2,094 in Oregon → Look up another NPI →
Also registered at 17 N 6TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Concidine, DDSDentist1538322219
Verify Spencer Joseph Marsden in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license PA191063Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7.1 times the Medicare Part D claims of the average physician assistant in 2024
5,892 Medicare Part D claims for 188 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 336 claims were for opioids.
Most prescribed
- Atorvastatin Calcium249 claims
- Lisinopril222 claims
- Amlodipine Besylate202 claims
- Duloxetine Hcl171 claims
- Irbesartan170 claims
- Omeprazole166 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
- Valley Family Health Care IncNyssa, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Spencer Joseph Marsden among 2,094 physician assistant records in Oregon
Spencer Joseph Marsden, PA-C is one of 2,094 physician assistant records with a practice address in Oregon. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 56% of them.
- NPI issued2018 · 56% of these records are older, 38% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2018 · median 2017 among the 1,552 with a school on file
- Record last updated2026 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 physician assistant records list a practice address in Nyssa
They are 3 of the 13 NPPES records with a practice address in Nyssa, and 2,094 physician assistant records in Oregon.
All 2,094 in Oregon → Every provider in Nyssa → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Amy Chan, PA-CNyssa, OR 979131235640525
- Angela Locke, PA-CNyssa, OR 979131306314398
- Caitlin Evans, PA-SOntario, OR 979141629650718
- Nicole Heywood, PA-COntario, OR 979141831564954
- Brittany Jones, PA-COntario, OR 979141013647791
- Katelyn NielsenOntario, OR 979141649900663
- Jared Papa, PA-COntario, OR 979141518047034
- Victoria Rogers, PA-COntario, OR 979141922106194
Common questions
What is Spencer Joseph Marsden, PA-C's NPI number?
Spencer Joseph Marsden, PA-C's National Provider Identifier (NPI) is 1881165470, issued on Dec 8, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Spencer Joseph Marsden, PA-C located?
The NPPES record lists a practice address at 17 N 6TH St, Nyssa, OR, 97913. Phone: (541) 372-2606. Providers update this record themselves, so call before visiting.
How can I verify Spencer Joseph Marsden, PA-C's license?
NPPES lists Oregon license number PA191063, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
How much does Spencer Joseph Marsden, PA-C prescribe under Medicare Part D?
In 2024, Spencer Joseph Marsden, PA-C had 5,892 Medicare Part D claims for 188 beneficiaries; the average among physician assistant prescribers was 830. 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.