NPI registry status
Active
2026 NPPES data Radiation Oncology Physician NPI 1437279692 M.D.
Verify on CMS → John Purviance, M.D.
Radiation Oncology Physician in Casper, Wyoming.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,029 in Radiation Oncology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
653
Medicare Part D claims · 186 beneficiaries · Radiation Oncology Physician avg: 186
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
58.5/100
▼ 25 pts below national avg 83.5 · Mid-tier
Industry payments
$904.08
48 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
John Purviance, M.D. reported a CMS MIPS final score of 58.5/100 - below the 83.5 national average - and filed 653 Medicare Part D claims in 2023.
- 58.5/100
- MIPS score · -25 vs avg
- 653
- Part D claims, 2023
- 95%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
John Purviance, M.D.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
59 ≥ 5th percentile 5% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where John Purviance, M.D. sits
This provider among radiation oncology physician peers
Across the 1,834 radiation oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, John Purviance, M.D. writes more Part D claims than 99% of them and scores higher on MIPS quality than 3% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one radiation oncology physician peer from a representative sample of 60; the gold marker is John Purviance, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
John Purviance, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about John Purviance, M.D.?
Below national averagePrimary specialty
Radiation Oncology Physician
Medicare Part D claims
653 251% vs specialty avg
MIPS final score
58.5/100 25 pts vs avg
Specialty distribution in Wyoming
How Radiation Oncology Physician compares to other specialties among Wyoming providers
Medicare quality performance, MIPS
John Purviance, M.D.'s 2023 MIPS final score plotted against the Radiation Oncology Physician national average
- MIPS Final Score
- 58.5/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Radiation Oncology Physician) - 58.5/100 vs national avg 83.5
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
John Purviance, M.D. appears in the CMS NPPES registry as a Radiation Oncology Physician provider holding M.D. credentials at 6501 E 2ND ST, Casper, WY, 82609, with a listed phone of (307) 235-5433. NPI 1437279692 was issued on 03/30/2007.
Medicare Part D records for calendar year 2023 show 653 prescription claims written by this provider, covering 186 Medicare beneficiaries and totaling roughly $44K in drug spend, split 5% brand-name and 95% generic by claim count, with an opioid prescribing rate of 5.8%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 58.5/100 for the 2023 performance year (Quality 47.8, Cost 57.4), compared with the 83.5 average among clinicians with a measured score.
Radiation Oncology Physician is a mid-sized specialty nationwide, with 6,029 enrolled providers across 53 states and an average of 186 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1437279692 |
|---|---|
| Specialty | Radiation Oncology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 03/30/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
58.5048
Final Score
Measured-score avg: 83.5
47.7793
Quality
57.4204
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where John Purviance, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Rocky Mountain Oncology Center LLC
Casper, WY
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for John Purviance, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$904
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Generic-heavy
John Purviance, M.D. - brand share 5.0%
Radiation Oncology Physician average
5% brand-name claims vs 95% generic, on 653 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
653
Total Claims
$44K
Total Drug Cost
186
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,048
- Total Day Supply
- 27,744
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $30K
- Generic Drug Cost
- $14K
- Opioid Claims
- 38 (5.8% rate)
- Antibiotic Claims
- 44
Patient Demographics
- Average Patient Age
- 73.9 years
- Avg HCC Risk Score
- 1.36
- Gender Split
- 30% female / 70% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Purviance, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tamsulosin Hcl
Tamsulosin Hcl
255 claims
- Levothyroxine Sodium 40
Levothyroxine Sodium
40 claims
- Ciprofloxacin Hcl 27
Ciprofloxacin Hcl
27 claims
- Methylprednisolone 25
Methylprednisolone
25 claims
- Lisinopril 18
Lisinopril
18 claims
- Trazodone Hcl 18
Trazodone Hcl
18 claims
- Ondansetron Odt 15
Ondansetron Odt
15 claims
- Potassium Chloride 15
Potassium Chloride
15 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 255 |
| Levothyroxine Sodium | 40 |
| Ciprofloxacin Hcl | 27 |
| Methylprednisolone | 25 |
| Lisinopril | 18 |
| Trazodone Hcl | 18 |
| Ondansetron Odt Ondansetron | 15 |
| Potassium Chloride | 15 |
| Gabapentin | 14 |
| Furosemide | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Radiation Oncology Physician Overview
How John Purviance, M.D. fits within the Radiation Oncology Physician landscape nationally.
6,029
Radiation Oncology Physician Providers in US
53
States with Radiation Oncology Physician
186
Avg Claims per Provider
John Purviance, M.D.'s 653 claims are above the specialty average of 186.
Nearby Radiation Oncology Physician Providers in Wyoming
Other clinicians with the same primary specialty enrolled in Wyoming, drawn from the same CMS NPPES roster as Purviance.
Dr. Jeffrey Carlton
M.D.
Cheyenne, WY
Dr. Subashini Furman
MD
Cheyenne, WY
Dr. Christine Lauro
M.D.
Casper, WY
Dr. John Stamato
M.D.
Sheridan, WY
Dr. Robert Tobin
MD
Casper, WY
Compare Radiation Oncology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Wyoming medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Radiation Oncology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Wyoming
Frequently Asked Questions
What is John Purviance, M.D.'s specialty? ▼
John Purviance, M.D. specializes in Radiation Oncology Physician and practices in Casper, Wyoming. Credentials: M.D..
How much does John Purviance, M.D. prescribe under Medicare Part D? ▼
In 2023, John Purviance, M.D. wrote 653 Medicare Part D claims totaling $44K in drug costs for 186 beneficiaries.
What is John Purviance, M.D.'s Medicare quality score? ▼
John Purviance, M.D. has a CMS MIPS Final Score of 58.5/100 (Quality: 47.8, Cost: 57.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is John Purviance, M.D. located? ▼
John Purviance, M.D. is located at 6501 E 2ND ST, Casper, WY, 82609. Phone: (307) 235-5433.
What is John Purviance, M.D.'s NPI number? ▼
John Purviance, M.D.'s National Provider Identifier (NPI) is 1437279692, issued on 03/30/2007.
Does John Purviance, M.D. prescribe more brand-name or generic drugs? ▼
John Purviance, M.D.'s prescribing is 5% brand-name and 95% generic drugs by claim count, with $30K in brand drug costs.
Does John Purviance, M.D. prescribe opioids? ▼
Yes, John Purviance, M.D. had 38 opioid claims in 2023 with an opioid prescribing rate of 5.8%.
How many Radiation Oncology Physician providers are there in the US? ▼
There are 6,029 Radiation Oncology Physician providers across 53 states in the US. The average Radiation Oncology Physician provider writes 186 Medicare Part D claims per year.
What drugs does John Purviance, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, John Purviance, M.D.'s most frequently prescribed drugs include Tamsulosin Hcl, Levothyroxine Sodium, Ciprofloxacin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Purviance, M.D. accept Medicare? ▼
John Purviance, M.D. appears in CMS Medicare data with 653 Part D claims and 186 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Purviance, M.D.'s credentials? ▼
John Purviance, M.D.'s NPI is 1437279692 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.