Bruce L. Flax, M.D.
Radiation Oncology Physician · Winchester, VA
Bruce L. Flax, M.D. is a radiation oncology physician with a practice address in Winchester, Virginia, and NPI 1366462640, issued on Jul 20, 2006. Check the license (Virginia 0101045858, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Bruce L. Flax
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 0101045858 VA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Campus Blvd., Winchester, VA 22601
- Phone
- (540) 662-1108
- Enumerated
- Jul 20, 2006
- Record last updated
- May 24, 2023
- Fax
- (540) 722-2635
- Medicaid IDs
- 7221690 VA
7221690 WV - Medicare enrollment
- Enrolled (PECOS I20110628000284); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1982
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 137 in Virginia → Look up another NPI →
Also registered at 400 Campus Blvd.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jonathan Hanson, FNPFamily Nurse Practitioner1457395089
- Anita Minghini, MDSurgery Physician1114911187
- Lindsey Morgan O'Brien, MDHematology & Oncology Physician1427291384
- Kristine Reed, MDHematology & Oncology Physician1023405560
- Lee Staley, RNFamily Nurse Practitioner1447566021
- Erin Stuller, LCSWClinical Social Worker1538536412
Verify Bruce L. Flax in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101045858Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average radiation oncology physician in 2024
140 Medicare Part D claims for 62 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Tamsulosin Hcl53 claims
- Memantine Hcl20 claims
- Oxycodone Hcl17 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.
The MIPS final score for 2023 (Medicare payment program): 86.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Shenandoah Oncology PCWinchester, VA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Bruce L. Flax among 137 radiation oncology physician records in Virginia
Bruce L. Flax, M.D. is one of 137 radiation oncology physician records with a practice address in Virginia. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1982 · median 2003 among the 96 with a school on file
- Record last updated2023 · 68% 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 Virginia 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 Virginia
There are 137 radiation oncology physician records in Virginia.
All 137 in Virginia → Every provider in Winchester → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Kristin Kowalchik, MDWinchester, VA 226011710130828
- Norman Smith, MDWinchester, VA 226011558386383
- Mark Macedon, MDStafford, VA 225541922249721
- Christopher Walsh, M.D.Montross, VA 225201699836676
- Anthony Crimaldi, MDCulpeper, VA 227011700845625
- Shiv Khandelwal, MDCulpeper, VA 227011841360013
- John Chinault, M.D.Fredericksburg, VA 224071235195736
- Conrado Gonzalez, MDFredericksburg, VA 224071083687479
Common questions
What is Bruce L. Flax, M.D.'s NPI number?
Bruce L. Flax, M.D.'s National Provider Identifier (NPI) is 1366462640, issued on Jul 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Bruce L. Flax, M.D. located?
The NPPES record lists a practice address at 400 Campus Blvd., Winchester, VA, 22601. Phone: (540) 662-1108. Providers update this record themselves, so call before visiting.
How can I verify Bruce L. Flax, M.D.'s license?
NPPES lists Virginia license number 0101045858, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Bruce L. Flax, M.D. prescribe under Medicare Part D?
In 2024, Bruce L. Flax, M.D. had 140 Medicare Part D claims for 62 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Bruce L. Flax, M.D.'s MIPS final score?
The 2023 MIPS final score is 86.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.