Samuel Evan Day, MD, PHD
Radiation Oncology Physician · Tucson, AZ
Samuel Evan Day, MD, PHD is a radiation oncology physician with a practice address in Tucson, Arizona, and NPI 1811304652, issued on Jul 14, 2014. Check the license (Arizona 58485, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Samuel Evan Day
- Credential
- MD, PHD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 58485 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 3700 E Fort Lowell RD Ste 130, Tucson, AZ 85716
- Phone
- (520) 881-0631
- Enumerated
- Jul 14, 2014
- Record last updated
- Aug 11, 2022
- Fax
- (520) 526-1773
- Medicare enrollment
- Enrolled (PECOS I20190828002841); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 2014
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 156 in Arizona → Look up another NPI →
Also registered at 3700 E Fort Lowell RD Ste 130
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Gin, M.D.Radiation Oncology Physician1811966575
- Ursula Roeder, M.D.Surgery Physician1588667232
Verify Samuel Evan Day in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 58485Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% more Medicare Part D claims than the average radiation oncology physician in 2024
136 Medicare Part D claims for 65 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Tamsulosin Hcl33 claims
- Ciprofloxacin Hcl24 claims
- Dexamethasone15 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: $871.34
38 payments; by number, the most common kind was food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 3,275 providers of this specialty with any payment received $1,897.85 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
- Arizona Blood And Cancer Specialists, PLLCGreen Valley, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Samuel Evan Day among 156 radiation oncology physician records in Arizona
Samuel Evan Day, MD, PHD is one of 156 radiation oncology physician records with a practice address in Arizona. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 76% of them.
- NPI issued2014 · 76% of these records are older, 18% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2014 · median 2003 among the 115 with a school on file
- Record last updated2022 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Arizona
There are 156 radiation oncology physician records in Arizona.
All 156 in Arizona → Every provider in Tucson → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Robert Gin, M.D.Tucson, AZ 857161811966575
- Matthew McFarlane, M.D., PH.D.Tucson, AZ 857181952763641
- Tijana Skrepnik, M.D.Tucson, AZ 857181922447127
- Nagy Elsayyad, MBBCH(MD)Tucson, AZ 857191851592687
- Jonathan Gabriel, DOTucson, AZ 857191295357309
- Matthew Greer, MDTucson, AZ 857191073045043
- Christopher Morrison, MD, PHDTucson, AZ 857191295183499
- Jonathan Sackett, MDTucson, AZ 857191427686401
Common questions
What is Samuel Evan Day, MD, PHD's NPI number?
Samuel Evan Day, MD, PHD's National Provider Identifier (NPI) is 1811304652, issued on Jul 14, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Samuel Evan Day, MD, PHD located?
The NPPES record lists a practice address at 3700 E Fort Lowell RD Ste 130, Tucson, AZ, 85716. Phone: (520) 881-0631. Providers update this record themselves, so call before visiting.
How can I verify Samuel Evan Day, MD, PHD's license?
NPPES lists Arizona license number 58485, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Samuel Evan Day, MD, PHD prescribe under Medicare Part D?
In 2024, Samuel Evan Day, MD, PHD had 136 Medicare Part D claims for 65 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.