Mason Zachary Day, DO
Internal Medicine Physician · Clinton, NC
Mason Zachary Day, DO is an internal medicine physician with a practice address in Clinton, North Carolina, and NPI 1225657208, issued on Apr 10, 2020. Check the license (North Carolina 2021-02917, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mason Zachary Day
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 2021-02917 NC
262144 NC
Self-reported in NPPES; status is on the state search - Practice location
- 607 Beaman St, Clinton, NC 28328
- Phone
- (910) 592-8511
- Enumerated
- Apr 10, 2020
- Record last updated
- Jul 7, 2023
- Medicare enrollment
- Enrolled (PECOS I20230721001386); accepts Medicare assignment
- Medical or professional school
- Lake Erie College Of Osteopathic Medicine, Erie, 2020
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,056 in North Carolina → Look up another NPI →
Also registered at 607 Beaman St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jordan Aikens, MDStudent in an Organized Health Care Education/Training Program1578213609
- Matthew Ammons, DOFamily Medicine Physician1740984749
- Falvy Barr, MDAnatomic Pathology & Clinical Pathology Physician1982664660
- Sophie Barrett, DOStudent in an Organized Health Care Education/Training Program1437090966
Verify Mason Zachary Day in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical Board
Search for license 2021-02917Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average internal medicine physician in 2024
313 Medicare Part D claims for 176 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin-Clavulanate Potass19 claims
- Amlodipine Besylate15 claims
- Prednisone15 claims
- Doxycycline Hyclate14 claims
- Cefdinir13 claims
- Furosemide12 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.
Industry payments in 2024: $19.63
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Bills Medicare through one group practice
- Usacs Integrated Acute Care Services OF North Carolina, PLLCElizabeth City, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mason Zachary Day among 4,056 internal medicine physician records in North Carolina
Mason Zachary Day, DO is one of 4,056 internal medicine physician records with a practice address in North Carolina. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2020 · median 2004 among the 2,706 with a school on file
- Record last updated2023 · 48% 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 North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 internal medicine physician records list a practice address in Clinton
They are 4 of the 343 NPPES records with a practice address in Clinton, and 4,056 internal medicine physician records in North Carolina.
All 4,056 in North Carolina → Every provider in Clinton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Subodh Pal, M.D.Clinton, NC 283281619921269
- Rodney Sessoms, M.D.Clinton, NC 283281558314476
- Paul Viser, MD PAClinton, NC 283281265617088
- Tasrif Ahmed, M.D.Dunn, NC 283341356728851
- Barbara Bethea, MDDunn, NC 283341295799393
- James Cappola, M.D.Dunn, NC 283341336158070
- Vidette Cooper, MDDunn, NC 283341568420107
- Mouhamed Fakhri, MDDunn, NC 283341205835832
Common questions
What is Mason Zachary Day, DO's NPI number?
Mason Zachary Day, DO's National Provider Identifier (NPI) is 1225657208, issued on Apr 10, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Mason Zachary Day, DO located?
The NPPES record lists a practice address at 607 Beaman St, Clinton, NC, 28328. Phone: (910) 592-8511. Providers update this record themselves, so call before visiting.
How can I verify Mason Zachary Day, DO's license?
NPPES lists North Carolina license number 2021-02917, as entered by the provider. Search the North Carolina Medical Board at https://portal.ncmedboard.org/verification/search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mason Zachary Day, DO prescribe under Medicare Part D?
In 2024, Mason Zachary Day, DO had 313 Medicare Part D claims for 176 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.