Dr. Samuel Evan Day, MD, PhD
- Medicare services, 2024
- 15,113
- Medicare patients, 2024
- 503
- Part D claims, 2024
- 136
- Industry payments
- $2,886
- Affiliated sites
- 1
- Practice address
- 3945 E Paradise Falls Dr, Tucson, AZ 85712
- Practice phone
- Call (520) 881-0631
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Arizona Blood and Cancer Specialists Tucson - Paradise Falls
Tucson, Arizona
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Dr. Samuel Evan Day is a radiation oncologist in Tucson, Arizona
Dr. Day practices at Arizona Blood and Cancer Specialists Tucson - Paradise Falls in Tucson, Arizona.
Dr. Day's NPI, 1811304652, was assigned on July 14, 2014. Dr. Day graduated from University of Colorado School of Medicine, Denver in 2014. Dr. Day holds Arizona license 58485.
- NPI
- 1811304652NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961715073
- NPI enumeration date
- July 14, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (520) 881-0631
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Samuel Evan Day practices at Arizona Blood and Cancer Specialists Tucson - Paradise Falls in Tucson, Arizona
Dr. Day's primary practice is Arizona Blood and Cancer Specialists Tucson - Paradise Falls, at 3945 E Paradise Falls Dr, Tucson, AZ 85712 in Pima County. The practice phone is (520) 881-0631.
- Arizona Blood and Cancer Specialists Tucson - Paradise Falls3945 E Paradise Falls Dr, Tucson, AZ 85712 · Pima CountyPhone(520) 881-0631
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Samuel Evan Day is affiliated with 2 sites of care and 2 medical groups
Dr. Day's primary practice is Arizona Blood and Cancer Specialists Tucson - Paradise Falls in Tucson, Arizona. The medical group on file is Arizona Blood & Cancer Specialists. Dmand AI also links Dr. Day to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Samuel Evan Day's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Day practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Arizona Blood and Cancer Specialists Tucson - Paradise Falls | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Samuel Evan Day is one of 141 radiation oncologists in Arizona
Radiation oncology is Dr. Day's primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Day is licensed in Arizona.
Specialties and state licenses
- Radiation oncology, ArizonaPrimary
Radiation oncologists near Dr. Day
Counts of radiation oncologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Samuel Evan Day billed Medicare for 15,113 services in 2024
CMS data shows 15,113 Medicare services from Dr. Day across 35 procedure codes in 2024, for 503 Medicare patients. Medicare paid $1,542,962 for them. Every service was in an office.
Dr. Day's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 12,4702024: 11,3429%
- Imaging
- 2023: 3,1852024: 3,49510%
- Office and hospital visits
- 2023: 2292024: 2436%
- Surgery
- 2023: 02024: 33
Dr. Day compared with the Arizona median for radiation oncologists, 2024
- Dr. Day
- Arizona median
- Medicare services
- 15,113vs 2,0727.3 times
- Medicare patients
- 503vs 2282.2 times
- Part D claims
- 72vs 4464% above
Medians across 141 radiation oncologists in Arizona with Dmand AI profiles that report each measure.
Dr. Day's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Day and other radiation oncologists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Samuel Evan Day treated 503 Medicare patients in 2024, average age 77
CMS counts 503 Medicare patients who saw Dr. Day in 2024. The largest group is 75 to 84, with 228 patients. 75% of them have cancer, and 75% have high cholesterol. 4% are also on Medicaid. Their average risk score is 1.89, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Day's median patient age at 75, with 38% women.
Dr. Day's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Day's Medicare patients by sex, 2024
- Women20040%
- Men30360%
Chronic conditions among Dr. Day's Medicare patients, 2024
- Cancer75%
- High cholesterol75%
- High blood pressure74%
- Arthritis43%
- Ischemic heart disease32%
- Chronic kidney disease30%
- Diabetes27%
- COPD24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Day's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women38%
- Men61%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Samuel Evan Day wrote 136 Medicare Part D claims in 2024
In 2024, Dr. Day wrote 136 Medicare Part D claims for 65 patients. 93% of them were for generic drugs. CMS names the drug for 72 of them, across 3 drugs with 11 or more claims each, at $533 in total drug cost. In 2023, CMS named 83 claims across 4 drugs.
Dr. Day's Part D claims by kind of drug, 2024
- Generic126 claims93%
- Brand-name and other10 claims7%
Dr. Day's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Day's Part D claims, 2024
- Antibiotics20%27 of 136 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 832024: 7213%
Drugs named by CMS: 3 in 2024, 4 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Samuel Evan Day takes part in Medicare
Dr. Day accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Samuel Evan Day received $2,886 in industry payments from 2016 to 2025
CMS Open Payments shows 114 general payments to Dr. Day from 42 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $292.
General payments to Dr. Day by program year, 2016 to 2025
Companies that paid Dr. Day the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Samuel Evan Day graduated from University of Colorado School of Medicine, Denver
Dr. Day graduated from University of Colorado School of Medicine, Denver in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Samuel Evan Day's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Samuel Evan Day
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Samuel Evan Day's NPI number?
Dr. Samuel Evan Day's NPI number is 1811304652. It was assigned on July 14, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Samuel Evan Day?
Dr. Samuel Evan Day is a radiation oncologist in Tucson, Arizona. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).
Where does Dr. Samuel Evan Day practice?
Dr. Day practices at 3945 E Paradise Falls Dr, Tucson, AZ 85712. Dr. Day's primary practice is Arizona Blood and Cancer Specialists Tucson - Paradise Falls in Tucson, Arizona. Dmand AI also links Dr. Day to 1 group practice or clinic and 1 medical group.
What is Dr. Samuel Evan Day's office phone number?
The practice phone on file for Dr. Day is (520) 881-0631.
What is Dr. Samuel Evan Day's medical license number?
Dr. Day holds Arizona license 58485.
What medical group is Dr. Samuel Evan Day part of?
Dr. Day is linked to Arizona Blood & Cancer Specialists. Dmand AI links Dr. Day to 1 more medical group.
Does Dr. Samuel Evan Day accept Medicare?
Yes. CMS data shows Dr. Day billed Medicare for 15,113 services in 2024, and Dr. Day accepts Medicare assignment.
How many Medicare patients does Dr. Samuel Evan Day see?
CMS counts 503 Medicare patients who saw Dr. Day in 2024, with an average age of 77.
What services does Dr. Samuel Evan Day bill to Medicare?
In 2024, Dr. Day's most billed Medicare services were medicare temporary code (Q9967), medicare service (G6015) and radiation oncology (77014).
Where did Dr. Samuel Evan Day go to medical school?
Dr. Day graduated from University of Colorado School of Medicine, Denver in 2014.
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What drugs does Dr. Samuel Evan Day prescribe most?
In 2024 Medicare Part D data, Dr. Day's most prescribed drugs by claims were Tamsulosin HCl, Ciprofloxacin HCl and Dexamethasone.
Has Dr. Samuel Evan Day received payments from drug or device companies?
CMS Open Payments shows $2,886 in general payments to Dr. Day from 42 companies from 2016 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Samuel Evan Day been practicing?
Dr. Day graduated from medical school in 2014, 12 years ago.
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