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Dr. Gradon C. Nielsen, MD
NPI1669868774PAC ID4688006612
- Medicare services, 2024
- 120,406
- Medicare patients, 2024
- 754
- Part D claims, 2024
- 860
- Publications
- 3
- Clinical trials
- 1
- Practice address
- 6251 E Virginia Beach Blvd, Norfolk, VA 23502
- Practice phone
- Call (757) 466-8683
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Virginia Oncology Associates
Norfolk, Virginia
Find Dr. Nielsen's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gradon C. Nielsen is a hematologist and oncologist in Norfolk, Virginia
Dr. Nielsen practices at Virginia Oncology Associates in Norfolk, Virginia.
Dr. Nielsen's NPI, 1669868774, was assigned on April 15, 2015. Dr. Nielsen graduated from University of Virginia School of Medicine in 2015. Dr. Nielsen holds Virginia license 0101271237.
NPI and contact details
- NPI
- 1669868774NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4688006612
- NPI enumeration date
- April 15, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (757) 466-8683
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gradon C. Nielsen practices at Virginia Oncology Associates in Norfolk, Virginia
Dr. Nielsen's primary practice is Virginia Oncology Associates, at 6251 E Virginia Beach Blvd, Norfolk, VA 23502 in Norfolk City. The practice phone is (757) 466-8683.
- Virginia Oncology Associates6251 E Virginia Beach Blvd, Norfolk, VA 23502 · Norfolk CityPhone(757) 466-8683
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gradon C. Nielsen is affiliated with 7 sites of care and 1 medical group
Dr. Nielsen's primary practice is Virginia Oncology Associates in Norfolk, Virginia. Dr. Nielsen is also affiliated with Sentara Norfolk General Hospital. The medical group on file is Virginia Oncology Associates. Dmand AI also links Dr. Nielsen to 4 more hospitals and 1 group practice or clinic, each named with a free account.
Virginia Oncology AssociatesPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gradon C. Nielsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nielsen practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Virginia Oncology Associates | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Gradon C. Nielsen is one of 297 hematologists and oncologists in Virginia
Hematology and oncology is Dr. Nielsen's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Nielsen is licensed in Virginia.
Specialties and state licenses
- Hematology and oncology, VirginiaPrimary
Hematologists and oncologists near Dr. Nielsen
Counts of hematologists and 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. Gradon C. Nielsen billed Medicare for 120,406 services in 2024
CMS data shows 120,406 Medicare services from Dr. Nielsen across 67 procedure codes in 2024, for 754 Medicare patients. Medicare paid $2,228,870 for them.
Medicare services, 2024120,406
Medicare patients754
Paid by Medicare$2.2M
Procedure codes67
Dr. Nielsen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 81,7482024: 107,72032%
- Lab and pathology
- 2023: 6,1202024: 7,39921%
- Tests and treatments
- 2023: 2,1272024: 2,3109%
- Office and hospital visits
- 2023: 1,3732024: 1,4385%
- Surgery
- 2023: 7782024: 88414%
- Other services
- 2023: 2012024: 655226%
Where Dr. Nielsen's Medicare services took place, 2024
- In an office120,311100%
- In a facility950%
Dr. Nielsen compared with the Virginia median for hematologists and oncologists, 2024
- Dr. Nielsen
- Virginia median
- Medicare services
- 120,406vs 3,51434.3 times
- Medicare patients
- 754vs 47459% above
- Part D claims
- 658vs 45246% above
Medians across 275 hematologists and oncologists in Virginia with Dmand AI profiles that report each measure.
Dr. Nielsen'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. Nielsen and other hematologists and oncologists in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gradon C. Nielsen treated 754 Medicare patients in 2024, average age 75
CMS counts 754 Medicare patients who saw Dr. Nielsen in 2024. The largest group is 75 to 84, with 313 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 6% are also on Medicaid. Their average risk score is 2.04, 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. Nielsen's median patient age at 66, with 54% women.
Medicare patients, 2024754
Average age75
Average risk score2.04
Also on Medicaid6%
Dr. Nielsen's Medicare patients by age, 2024
Dr. Nielsen's Medicare patients by sex, 2024
- Women40654%
- Men34846%
Chronic conditions among Dr. Nielsen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Cancer44%
- Arthritis42%
- Diabetes38%
- Chronic kidney disease34%
- Ischemic heart disease32%
- COPD27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nielsen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gradon C. Nielsen wrote 860 Medicare Part D claims in 2024
In 2024, Dr. Nielsen wrote 860 Medicare Part D claims for 157 patients. 76% of them were for generic drugs. CMS names the drug for 658 of them, across 28 drugs with 11 or more claims each, at $1,464,342 in total drug cost. In 2023, CMS named 547 claims across 25 drugs.
Part D claims, 2024860
Drugs named by CMS28
Total drug cost$1.5M
Part D patients157
Dr. Nielsen's Part D claims by kind of drug, 2024
- Generic655 claims76%
- Brand-name205 claims24%
Dr. Nielsen'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. Nielsen's Part D claims, 2024
- Opioids6%49 of 860 claims
- Antibiotics2%20 of 860 claims
- Antipsychotics, patients 65 and over5%47 of 860 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: 5472024: 65820%
Drugs named by CMS: 28 in 2024, 25 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
Dr. Gradon C. Nielsen offers telehealth to Medicare patients
Dr. Nielsen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nielsen as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gradon C. Nielsen has 3 publications on record
Dmand AI links 3 papers to Dr. Nielsen, published from 2017 to 2019. 2017 was the busiest year, with 2. Dr. Nielsen's most frequent co-authors are Patrick M. Dillon, MD, David W. Dougherty, MD and Robert Allan Havard, MD.
Papers3
Years published2017 to 2019
Dr. Nielsen's most frequent co-authors
- Patrick M. Dillon, MD1 shared paper
- David W. Dougherty, MD1 shared paper
- Robert Allan Havard, MD1 shared paper
Recent publications by Dr. Nielsen
Antineoplastic AgentsCarboplatinCisplatin
DeathHospicesIntensive Care Units
See who Dr. Nielsen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nielsen works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gradon C. Nielsen has worked on 1 clinical trial
Dmand AI links Dr. Nielsen to 1 clinical trial.
Recent clinical trials with Dr. Nielsen
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Gradon C. Nielsen received $444 in industry payments from 2019 to 2025
CMS Open Payments shows 5 general payments to Dr. Nielsen from 5 drug and device companies from 2019 to 2025. Education make up the largest share, 44% of the total. Pfizer Inc. paid the most, $150.
General payments to Dr. Nielsen by program year, 2019 to 2025
General payments to Dr. Nielsen by kind, 2019 to 2025
$444in total
- Education$19544%
- Speaker and faculty fees$15034%
- Food and beverage$9922%
Companies that paid Dr. Nielsen the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gradon C. Nielsen graduated from University of Virginia School of Medicine
Dr. Nielsen graduated from University of Virginia School of Medicine in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gradon C. Nielsen'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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. Gradon C. Nielsen
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. Gradon C. Nielsen's NPI number?
Dr. Gradon C. Nielsen's NPI number is 1669868774. It was assigned on April 15, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Gradon C. Nielsen?
Dr. Gradon C. Nielsen is a hematologist and oncologist in Norfolk, Virginia. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Gradon C. Nielsen practice?
Dr. Nielsen practices at 6251 E Virginia Beach Blvd, Norfolk, VA 23502. Dr. Nielsen's primary practice is Virginia Oncology Associates in Norfolk, Virginia. Dmand AI also links Dr. Nielsen to 4 hospitals and 1 group practice or clinic.
What is Dr. Gradon C. Nielsen's office phone number?
The practice phone on file for Dr. Nielsen is (757) 466-8683.
What is Dr. Gradon C. Nielsen's medical license number?
Dr. Nielsen holds Virginia license 0101271237.
Which hospitals is Dr. Gradon C. Nielsen affiliated with?
Dr. Nielsen is affiliated with Sentara Norfolk General Hospital. Dmand AI links Dr. Nielsen to 4 more hospitals.
What medical group is Dr. Gradon C. Nielsen part of?
Dr. Nielsen is linked to Virginia Oncology Associates.
Does Dr. Gradon C. Nielsen accept Medicare?
Yes. CMS data shows Dr. Nielsen billed Medicare for 120,406 services in 2024, and Dr. Nielsen accepts Medicare assignment.
Does Dr. Gradon C. Nielsen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Nielsen as offering telehealth services.
How many Medicare patients does Dr. Gradon C. Nielsen see?
CMS counts 754 Medicare patients who saw Dr. Nielsen in 2024, with an average age of 75.
Show 7 more questionsShow fewer questions
What services does Dr. Gradon C. Nielsen bill to Medicare?
In 2024, Dr. Nielsen's most billed Medicare services were injected or infused drug (J9271), injected or infused drug (J1453) and injected or infused drug (J9263).
Where did Dr. Gradon C. Nielsen go to medical school?
Dr. Nielsen graduated from University of Virginia School of Medicine in 2015.
What drugs does Dr. Gradon C. Nielsen prescribe most?
In 2024 Medicare Part D data, Dr. Nielsen's most prescribed drugs by claims were Dexamethasone, Olanzapine and Eliquis.
Has Dr. Gradon C. Nielsen received payments from drug or device companies?
CMS Open Payments shows $444 in general payments to Dr. Nielsen from 5 companies from 2019 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Gradon C. Nielsen been practicing?
Dr. Nielsen graduated from medical school in 2015, 11 years ago.
Does Dr. Gradon C. Nielsen do research?
Dmand AI links 3 publications to Dr. Nielsen, published from 2017 to 2019. Dr. Nielsen has worked on 1 clinical trial.
Who does Dr. Gradon C. Nielsen publish with?
Dr. Nielsen's most frequent co-authors are Patrick M. Dillon, MD (1 shared paper), David W. Dougherty, MD (1 shared paper) and Robert Allan Havard, MD (1 shared paper).
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