Ian Winchester Flinn, M.D.
Hematology & Oncology Physician · Nashville, TN
Ian Winchester Flinn, M.D. is a hematology & oncology physician with a practice address in Nashville, Tennessee, and NPI 1417990367, issued on Jun 14, 2006. Check the license (Tennessee 41006, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Ian Winchester Flinn
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 41006 TN
Self-reported in NPPES; status is on the state search - Practice location
- 250 25TH Ave N, Nashville, TN 37203
- Phone
- (615) 986-7600
- Enumerated
- Jun 14, 2006
- Record last updated
- Jan 24, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (615) 986-7601
- Medicare enrollment
- Enrolled (PECOS I20060428000518); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 273 in Tennessee → Look up another NPI →
Also registered at 250 25TH Ave N
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Lesley Ballance, FNP-BCFamily Nurse Practitioner1033570015
- Johanna Bendell, M.D.Hematology & Oncology Physician1083703540
- Jesus Berdeja, M.D.Hematology & Oncology Physician1902842412
- Howard Burris, M.D.Medical Oncology Physician1417992397
Verify Ian Winchester Flinn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 41006Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% more Medicare Part D claims than the average hematology & oncology physician in 2024
960 Medicare Part D claims for 117 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 58% of claims.
Most prescribed
- Calquence134 claims
- Acyclovir122 claims
- Brukinsa116 claims
- Venclexta94 claims
- Imbruvica56 claims
- Sulfamethoxazole-Trimethoprim49 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: $22,020.61
42 payments; by number, the most common kind was food and beverage; the largest payer was BeiGene USA, 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
- Tennessee Oncology PLLCTullahoma, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ian Winchester Flinn among 273 hematology & oncology physician records in Tennessee
Ian Winchester Flinn, M.D. is one of 273 hematology & oncology physician records with a practice address in Tennessee. 89% 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 16% of them.
- NPI issued2006 · 16% of these records are older, 53% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated1990 · median 2004 among the 223 with a school on file
- Record last updated2012 · 46% 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 Tennessee 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 Tennessee
There are 273 hematology & oncology physician records in Tennessee.
All 273 in Tennessee → Every provider in Nashville → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Jonathan Abbas, MDNashville, TN 372031316145253
- Minocher Battiwalla, MDNashville, TN 372031861497570
- Todd Bauer, MDNashville, TN 372031336296136
- Johanna Bendell, M.D.Nashville, TN 372031083703540
- Jesus Berdeja, M.D.Nashville, TN 372031902842412
- William Donnellan, M.D.Nashville, TN 372031396906657
- Habib Doss, MDNashville, TN 372031174565543
- Robert Green, M.D.Nashville, TN 372031396741377
Common questions
What is Ian Winchester Flinn, M.D.'s NPI number?
Ian Winchester Flinn, M.D.'s National Provider Identifier (NPI) is 1417990367, issued on Jun 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ian Winchester Flinn, M.D. located?
The NPPES record lists a practice address at 250 25TH Ave N, Nashville, TN, 37203. Phone: (615) 986-7600. Providers update this record themselves, so call before visiting.
How can I verify Ian Winchester Flinn, M.D.'s license?
NPPES lists Tennessee license number 41006, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ian Winchester Flinn, M.D. prescribe under Medicare Part D?
In 2024, Ian Winchester Flinn, M.D. had 960 Medicare Part D claims for 117 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Ian Winchester Flinn, M.D.'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.