Elizabeth M. Tapen, MD
Radiation Oncology Physician · Big Sky, MT
Elizabeth M. Tapen, MD is a radiation oncology physician with a practice address in Big Sky, Montana, and NPI 1134108525, issued on Jan 13, 2006. Check the license on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Elizabeth M. Tapen
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 2323381 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2091 Little Coyote RD Ste 161029, Big Sky, MT 59716
- Phone
- (845) 797-8700
- Enumerated
- Jan 13, 2006
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid IDs
- 2622228 NY
02622228 NY - Medicare enrollment
- Enrolled (PECOS I20171109003019); accepts Medicare assignment
- Medical or professional school
- Rutgers School Of Dental Medicine, 1990
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 24 in Montana → Look up another NPI →
Verify Elizabeth M. Tapen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical ExaminersCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average radiation oncology physician in 2024
67 Medicare Part D claims for 33 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Tamsulosin Hcl32 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.
Industry payments in 2024: $52.28
2 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. 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
- Northbay Physicians Surgery Center, LLCFairfield, CA
- St. Helena HospitalSaint Helena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Elizabeth M. Tapen among 24 radiation oncology physician records in Montana
Elizabeth M. Tapen, MD is one of 24 radiation oncology physician records with a practice address in Montana. 79% 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 21% of them.
- NPI issued2006 · 21% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated1990 · median 1997 among the 19 with a school on file
- Record last updated2021 · 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 2085R0001X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 radiation oncology physician record lists a practice address in Big Sky
They are 1 of the 52 NPPES records with a practice address in Big Sky, and 24 radiation oncology physician records in Montana.
All 24 in Montana → Every provider in Big Sky → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Christopher Baker, M.D.Bozeman, MT 597151609223932
- Richard Belgrad, M.D.Bozeman, MT 597151023061488
- Eugene Hughes, M.D.Butte, MT 597011952519761
- Marc Nash, MDButte, MT 597011205162922
- Katherine Markette, M.D.Missoula, MT 598021407806987
- Margaret Menendez, M.D.Missoula, MT 598021447208079
- Jeffrey Stephenson, MDMissoula, MT 598021053312900
- Michelle Proper, M.D.Missoula, MT 598041003088634
Common questions
What is Elizabeth M. Tapen, MD's NPI number?
Elizabeth M. Tapen, MD's National Provider Identifier (NPI) is 1134108525, issued on Jan 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Elizabeth M. Tapen, MD located?
The NPPES record lists a practice address at 2091 Little Coyote RD Ste 161029, Big Sky, MT, 59716. Phone: (845) 797-8700. Providers update this record themselves, so call before visiting.
How can I verify Elizabeth M. Tapen, MD's license?
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 Elizabeth M. Tapen, MD prescribe under Medicare Part D?
In 2024, Elizabeth M. Tapen, MD had 67 Medicare Part D claims for 33 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
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.