Mark Thomas Day, DO
Cardiovascular Disease Physician · Lebanon, OR
Mark Thomas Day, DO is a cardiovascular disease physician with a practice address in Lebanon, Oregon, and NPI 1225492796, issued on Apr 11, 2016. Check the license (Oregon DO197880, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Thomas Day
- Credential
- DO
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License numbers
- DO197880 OR
182616 OR
Self-reported in NPPES; status is on the state search - Practice location
- 525 N Santiam Hwy, Lebanon, OR 97355
- Phone
- (541) 258-2101
- Enumerated
- Apr 11, 2016
- Record last updated
- Feb 28, 2023
- Medicare enrollment
- Enrolled (PECOS I20211203001985); accepts Medicare assignment
- Medical or professional school
- Des Moines University Of Osteopathic Medicine And Health Sciences, 2017
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 265 in Oregon → Look up another NPI →
Also registered at 525 N Santiam Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anupam Arora, MDInternal Medicine Physician1861620254
- William Barish, M.D.Hospitalist Physician1518901313
- Tasha Barkley, M. D. M.P.H.Emergency Medicine Physician1154687168
- Kelly Becker, DPTPhysical Therapist1124477328
- Richard Bell, MDEmergency Medicine Physician1548285752
- Crystal Buglino, PACSurgical Physician Assistant1528395969
Verify Mark Thomas Day in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license DO197880Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
1,338 Medicare Part D claims for 285 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D.
Most prescribed
- Metoprolol Succinate146 claims
- Jardiance138 claims
- Eliquis88 claims
- Carvedilol76 claims
- Spironolactone75 claims
- Farxiga73 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $295.14
14 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 16,686 providers of this specialty with any payment received $3,819.56 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.
6 hospitals and group practices
- Legacy Mount Hood Medical CenterGresham, OR · Acute Care Hospitals3 of 5 stars
- Legacy Clinics LLCPortland, OR
- Legacy Emanuel Hospital And Health CenterPortland, OR
- Legacy Good Samaritan Hospital And Medical CenterPortland, OR
- Legacy Meridian Park HospitalTualatin, OR
- Legacy Salmon Creek HospitalVancouver, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Mark Thomas Day among 265 cardiovascular disease physician records in Oregon
Mark Thomas Day, DO is one of 265 cardiovascular disease physician records with a practice address in Oregon. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 92% of them.
- NPI issued2016 · 92% of these records are older, 7% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2017 · median 2001 among the 182 with a school on file
- Record last updated2023 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Oregon
There are 265 cardiovascular disease physician records in Oregon.
All 265 in Oregon → Every provider in Lebanon → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Abinet Ashine, M.D.Corvallis, OR 973301326314121
- Timothy Atha, M.D.Corvallis, OR 973301053332742
- Francis Celis, D.O.Corvallis, OR 973301891707683
- Ashwat Dhillon, M.D.Corvallis, OR 973301871813394
- Tyler Earley, DOCorvallis, OR 973301598142614
- Janice Frost, M.D.Corvallis, OR 973301841367810
- Dimitri Greschner, MDCorvallis, OR 973301831365048
- Sonia Hasbun, DOCorvallis, OR 973301578940441
Common questions
What is Mark Thomas Day, DO's NPI number?
Mark Thomas Day, DO's National Provider Identifier (NPI) is 1225492796, issued on Apr 11, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mark Thomas Day, DO located?
The NPPES record lists a practice address at 525 N Santiam Hwy, Lebanon, OR, 97355. Phone: (541) 258-2101. Providers update this record themselves, so call before visiting.
How can I verify Mark Thomas Day, DO's license?
NPPES lists Oregon license number DO197880, 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 Mark Thomas Day, DO prescribe under Medicare Part D?
In 2024, Mark Thomas Day, DO had 1,338 Medicare Part D claims for 285 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Mark Thomas Day, DO's MIPS final score?
The 2023 MIPS final score is 86.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.