Thomas A. Warr, MD
Hematology & Oncology Physician · Great Falls, MT
Thomas A. Warr, MD is a hematology & oncology physician with a practice address in Great Falls, Montana, and NPI 1356342208, issued on Aug 2, 2005. Check the license (Montana 6376, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Thomas A. Warr
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 6376 MT
Self-reported in NPPES; status is on the state search - Practice location
- 3000 15TH Ave S, Great Falls, MT 59405
- Phone
- (406) 454-2171
- Enumerated
- Aug 2, 2005
- Record last updated
- Oct 16, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (406) 771-3082
- Medicaid ID
- 0073424 MT
- Medicare enrollment
- Enrolled (PECOS I20091216000646); accepts Medicare assignment
- Medical or professional school
- Vanderbilt University School Of Medicine, 1981
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 44 in Montana → Look up another NPI →
Also registered at 3000 15TH Ave S
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Maria Gee, P.T.Physical Therapist1346456910
Verify Thomas A. Warr in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 6376Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,407 Medicare Part D claims for 166 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 194 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen87 claims
- Furosemide65 claims
- Anastrozole61 claims
- Prednisone60 claims
- Abiraterone Acetate39 claims
- Omeprazole39 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): 87.3 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).
Industry payments in 2024: $2,300.11
106 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, 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
- Great Falls Clinic LLCGreat Falls, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas A. Warr among 44 hematology & oncology physician records in Montana
Thomas A. Warr, MD is one of 44 hematology & oncology physician records with a practice address in Montana. 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, 84% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1981 · median 2000 among the 28 with a school on file
- Record last updated2014 · 59% 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 Montana 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 Montana
There are 44 hematology & oncology physician records in Montana.
All 44 in Montana → Every provider in Great Falls → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Donald Berdeaux, MDGreat Falls, MT 594051114934221
- Jennifer Carter, M.DGreat Falls, MT 594051891136644
- Karl Guter, MDGreat Falls, MT 594051437150331
- Jessica Kaae, D.O.Great Falls, MT 594051811335003
- Patrick Tang, MDGreat Falls, MT 594051316109739
- Thomas Reid, MDHavre, MT 595011295742153
- Aaron Franke, M.D.Sidney, MT 592701730568403
- Karine Darbinyan, M.D.Helena, MT 596011134520745
Common questions
What is Thomas A. Warr, MD's NPI number?
Thomas A. Warr, MD's National Provider Identifier (NPI) is 1356342208, issued on Aug 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thomas A. Warr, MD located?
The NPPES record lists a practice address at 3000 15TH Ave S, Great Falls, MT, 59405. Phone: (406) 454-2171. Providers update this record themselves, so call before visiting.
How can I verify Thomas A. Warr, MD's license?
NPPES lists Montana license number 6376, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas A. Warr, MD prescribe under Medicare Part D?
In 2024, Thomas A. Warr, MD had 1,407 Medicare Part D claims for 166 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Thomas A. Warr, MD's MIPS final score?
The 2023 MIPS final score is 87.3 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.