Cynthia Sue Marske, DO
Internal Medicine Physician · Corvallis, OR
Cynthia Sue Marske, DO is an internal medicine physician with a practice address in Corvallis, Oregon, and NPI 1891721023, issued on Jun 22, 2006. Check the license (Oregon DO150418, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Cynthia Sue Marske
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- DO150418 OR
20A8560 CA
Self-reported in NPPES; status is on the state search - Practice location
- 530 NW 27TH St, Corvallis, OR 97330
- Phone
- (541) 766-6835
- Enumerated
- Jun 22, 2006
- Record last updated
- May 14, 2025
- Fax
- (541) 766-6186
- Medicaid ID
- 500616008 OR
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Also registered at 530 NW 27TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dennis Abreu, LCSWClinical Social Worker1134180573
- Robert AckerlindCommunity Health Worker1356787568
- Kareem AddassiStudent in an Organized Health Care Education/Training Program1063074870
- Queenie Love AgbayaniCommunity Health Worker1801549126
- Deidma Agee-Brockmann, QMHACase Manager/Care Coordinator1316148638
- Mustafa Al IsmailCommunity Health Worker1316312978
Verify Cynthia Sue Marske in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license DO150418Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average internal medicine physician in 2024
8,188 Medicare Part D claims for 416 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 327 claims were for opioids.
Most prescribed
- Atorvastatin Calcium348 claims
- Levothyroxine Sodium312 claims
- Gabapentin252 claims
- Lisinopril235 claims
- Amlodipine Besylate176 claims
- Omeprazole160 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.
Cynthia Sue Marske among 2,116 internal medicine physician records in Oregon
Cynthia Sue Marske, DO is one of 2,116 internal medicine 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 7% of them.
- NPI issued2006 · 7% of these records are older, 54% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
129 internal medicine physician records list a practice address in Corvallis
They are 129 of the 4,096 NPPES records with a practice address in Corvallis, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Corvallis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Steven Athay, M.D.Corvallis, OR 973301477502375
- Lynn Bentson, M.D, MACPCorvallis, OR 973301619916483
- Charlene Carroll, M.D.Corvallis, OR 973301275577769
- Brian Curtis, M.D.Corvallis, OR 973301245289115
- Ulrike Guempel, M.D.Corvallis, OR 973301912956897
- Kien Huynh, M.D.Corvallis, OR 973301619918034
- Janel Lawrence, M.D.Corvallis, OR 973301184673998
- Libor Pavlosek, M.D.Corvallis, OR 973301376510420
Common questions
What is Cynthia Sue Marske, DO's NPI number?
Cynthia Sue Marske, DO's National Provider Identifier (NPI) is 1891721023, issued on Jun 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cynthia Sue Marske, DO located?
The NPPES record lists a practice address at 530 NW 27TH St, Corvallis, OR, 97330. Phone: (541) 766-6835. Providers update this record themselves, so call before visiting.
How can I verify Cynthia Sue Marske, DO's license?
NPPES lists Oregon license number DO150418, 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 Cynthia Sue Marske, DO prescribe under Medicare Part D?
In 2024, Cynthia Sue Marske, DO had 8,188 Medicare Part D claims for 416 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.