Mark A. Easterday, M.D.
Internal Medicine Physician · Westerville, OH
Mark A. Easterday, M.D. is an internal medicine physician with a practice address in Westerville, Ohio, and NPI 1891773263, issued on Jan 5, 2006. Check the license (Ohio 35-071525, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Mark A. Easterday
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 35-071525 OH
Self-reported in NPPES; status is on the state search - Practice location
- 477 Cooper RD Ste 300, Westerville, OH 43081
- Phone
- (740) 803-0599
- Enumerated
- Jan 5, 2006
- Record last updated
- Apr 11, 2022
- Medicaid ID
- 2498104 OH
- Medicare enrollment
- Enrolled (PECOS I20040911000321); accepts Medicare assignment
- Medical or professional school
- Wright State University Boonshoft School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,277 in Ohio → Look up another NPI →
Also registered at 477 Cooper RD Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark A. Easterday in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35-071525Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average internal medicine physician in 2024
638 Medicare Part D claims for 51 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Atorvastatin Calcium59 claims
- Amlodipine Besylate41 claims
- Eliquis26 claims
- Tamsulosin Hcl24 claims
- Gabapentin22 claims
- Levothyroxine Sodium19 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
- Mount Carmel Health SystemWesterville, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Easterday among 5,277 internal medicine physician records in Ohio
Mark A. Easterday, M.D. is one of 5,277 internal medicine physician records with a practice address in Ohio. 81% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1995 · median 2006 among the 3,414 with a school on file
- Record last updated2022 · 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 Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
59 internal medicine physician records list a practice address in Westerville
They are 59 of the 3,300 NPPES records with a practice address in Westerville, and 5,277 internal medicine physician records in Ohio.
All 5,277 in Ohio → Every provider in Westerville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jacqueline Amico, M.D.Westerville, OH 430811487640264
- Nancy Andreano, DOWesterville, OH 430811750320024
- James Cacchillo, D.O.Westerville, OH 430811588642896
- Nami Cho, M.D.Westerville, OH 430811023091683
- Nina Deep, M.D.Westerville, OH 430811154308369
- Douglas Fosselman, M.D.Westerville, OH 430811679556229
- Jennifer Haines, M.D.Westerville, OH 430811043206824
- Rena Henriques, M.D.Columbus, OH 430811851324644
Common questions
What is Mark A. Easterday, M.D.'s NPI number?
Mark A. Easterday, M.D.'s National Provider Identifier (NPI) is 1891773263, issued on Jan 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Easterday, M.D. located?
The NPPES record lists a practice address at 477 Cooper RD Ste 300, Westerville, OH, 43081. Phone: (740) 803-0599. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Easterday, M.D.'s license?
NPPES lists Ohio license number 35-071525, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark A. Easterday, M.D. prescribe under Medicare Part D?
In 2024, Mark A. Easterday, M.D. had 638 Medicare Part D claims for 51 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.