Gregory Gagnon
Radiation Oncology Physician · Frederick, MD
Gregory Gagnon is a radiation oncology physician with a practice address in Frederick, Maryland, and NPI 1407854268, issued on Jul 14, 2005. Check the license (Maryland D39954, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Gregory Gagnon
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- D39954 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1562 Opossumtown Pike, Frederick, MD 21702
- Phone
- (240) 566-4500
- Enumerated
- Jul 14, 2005
- Record last updated
- Aug 30, 2023
- Fax
- (301) 694-5554
- Medicaid ID
- 758511000 MD
- Medicare enrollment
- Enrolled (PECOS I20100409000069); accepts Medicare assignment
- Medical or professional school
- University Of Virginia School Of Medicine, 1986
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 124 in Maryland → Look up another NPI →
Also registered at 1562 Opossumtown Pike
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aisha Abdul-Samad, STSpeech-Language Pathologist1629291067
- Stephanie Adami, OTOccupational Therapist1487717385
- Atrish Akhtar, M.D.Internal Medicine Physician1386082881
- Eden Amdemichael, M.D.Surgery Physician1659530509
- Janna BarrickOccupational Therapist1194948448
- Oscar Raymond Bascug, DOHematology & Oncology Physician1417484627
Verify Gregory Gagnon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D39954Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% more Medicare Part D claims than the average radiation oncology physician in 2024
216 Medicare Part D claims for 97 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Tamsulosin Hcl53 claims
- Ciprofloxacin Hcl26 claims
- Diazepam20 claims
- Sulfasalazine13 claims
- Oxycodone Hcl12 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $58.53
3 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 2 group practices
- Frederick Health Hospital IncFrederick, MD
- Gagnon Oncology LLCFrederick, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Gagnon among 124 radiation oncology physician records in Maryland
Gregory Gagnon is one of 124 radiation oncology physician records with a practice address in Maryland. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1986 · median 2006 among the 89 with a school on file
- Record last updated2023 · 65% 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 Maryland 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 Maryland
There are 124 radiation oncology physician records in Maryland.
All 124 in Maryland → Every provider in Frederick → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Alan Epstein, M.D.Fort Detrick, MD 217021992059422
- Meredith Wernick, M.D., D.A.B.R.Frederick, MD 217021720386469
- Kwok Lee, MDFrederick, MD 217011477550986
- Zeinab Abou Yehia, M.D.Salisbury, MD 218011699124263
- Gail Anderson, M.D.Salisbury, MD 218011871678870
- David McDermott, M.D.Salisbury, MD 218011508286311
- William Woods, M.D.Salisbury, MD 218011275561011
- John Mastandrea, M.D.Easton, MD 216011518999697
Common questions
What is Gregory Gagnon's NPI number?
Gregory Gagnon's National Provider Identifier (NPI) is 1407854268, issued on Jul 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Gagnon located?
The NPPES record lists a practice address at 1562 Opossumtown Pike, Frederick, MD, 21702. Phone: (240) 566-4500. Providers update this record themselves, so call before visiting.
How can I verify Gregory Gagnon's license?
NPPES lists Maryland license number D39954, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Gagnon prescribe under Medicare Part D?
In 2024, Gregory Gagnon had 216 Medicare Part D claims for 97 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Gregory Gagnon's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.