James Nathaniel Mason, D.O.
Hematology & Oncology Physician · Ogden, UT
James Nathaniel Mason, D.O. is a hematology & oncology physician with a practice address in Ogden, Utah, and NPI 1114362001, issued on May 6, 2013. Check the license on the Utah Medical Licensing Board; the Medicare figures below come from public CMS files.
- Name
- James Nathaniel Mason
- Credential
- D.O.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- Q8954 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4403 Harrison Blvd Ste 1670, Ogden, UT 84403
- Phone
- (801) 387-7150
- Enumerated
- May 6, 2013
- Record last updated
- Jul 16, 2025
- Medicare enrollment
- Enrolled (PECOS I20250721003723); accepts Medicare assignment
- Medical or professional school
- Oklahoma State University College Of Osteopathic Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 99 in Utah → Look up another NPI →
Also registered at 4403 Harrison Blvd Ste 1670
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Deanna Bojanower, APRN-BCNurse Practitioner1780886945
- Easton RobertsAcute Care Nurse Practitioner1861206229
Verify James Nathaniel Mason in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersUtah Medical Licensing BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,216 Medicare Part D claims for 145 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims. 234 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen135 claims
- Hydroxyurea97 claims
- Eliquis79 claims
- Valacyclovir49 claims
- Calquence38 claims
- Imatinib Mesylate38 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: $200.83
2 payments; by number, the most common kind was education; the largest payer was Genmab U.S., Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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
- Ihc Health Services IncOgden, UT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Nathaniel Mason among 99 hematology & oncology physician records in Utah
James Nathaniel Mason, D.O. is one of 99 hematology & oncology physician records with a practice address in Utah. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 58% of them.
- NPI issued2013 · 58% of these records are older, 37% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2013 · median 2009 among the 65 with a school on file
- Record last updated2025 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Utah practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Utah
There are 99 hematology & oncology physician records in Utah.
All 99 in Utah → Every provider in Ogden → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- David Cassel, M.D.Ogden, UT 844031972922938
- Vincent Hansen, MDOgden, UT 844031528044385
- Belisario Arango, MDOgden, UT 844051295976827
- Carl Gray, M.D.Ogden, UT 844051598873382
- Harold Johnson, M.D.Ogden, UT 844051326156191
- Joshua Ramsay, DO, MBAOgden, UT 844051093245607
- Ali Ben-Jacob, MDLogan, UT 843411083611669
- Prashant Sharma, MDLogan, UT 843411548430663
Common questions
What is James Nathaniel Mason, D.O.'s NPI number?
James Nathaniel Mason, D.O.'s National Provider Identifier (NPI) is 1114362001, issued on May 6, 2013. An NPI identifies a provider in billing; it is not a license.
Where is James Nathaniel Mason, D.O. located?
The NPPES record lists a practice address at 4403 Harrison Blvd Ste 1670, Ogden, UT, 84403. Phone: (801) 387-7150. Providers update this record themselves, so call before visiting.
How can I verify James Nathaniel Mason, D.O.'s license?
Search the Utah Medical Licensing Board at https://secure.utah.gov/llv/search/index.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Nathaniel Mason, D.O. prescribe under Medicare Part D?
In 2024, James Nathaniel Mason, D.O. had 1,216 Medicare Part D claims for 145 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.