NPI registry status
Active
2026 NPPES data Occupational Medicine Physician NPI 1861451379 MD
Verify on CMS → Dennis Thrasher, MD
Occupational Medicine Physician in Tucson, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 2,230 in Occupational Medicine 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
229
Medicare Part D claims · 20 beneficiaries · Occupational Medicine Physician avg: 605
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Dennis Thrasher, MD filed 229 Medicare Part D claims in 2023 as a Occupational Medicine Physician in Tucson, Arizona.
- 229
- Part D claims, 2023
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.
Dennis Thrasher, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
229 49th percentile higher than 49% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Dennis Thrasher, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Dennis Thrasher, MD?
Quality data not reportedPrimary specialty
Occupational Medicine Physician
Medicare Part D claims
229 62% vs specialty avg
Specialty distribution in Arizona
How Occupational Medicine Physician compares to other specialties among Arizona providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Occupational Medicine Physician. Verify directly:
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).
Dennis Thrasher, MD appears in the CMS NPPES registry as a Occupational Medicine Physician provider holding MD credentials at 3681 S PALO VERDE RD, Tucson, AZ, 85713, with a listed phone of (520) 750-8855. NPI 1861451379 was issued on 03/22/2006.
Medicare Part D records for calendar year 2023 show 229 prescription claims written by this provider, covering 20 Medicare beneficiaries and totaling roughly $13K in drug spend, with an opioid prescribing rate of 31.9%.
Occupational Medicine Physician is a narrow specialty nationwide, with 2,230 enrolled providers across 52 states and an average of 605 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 | 1861451379 |
|---|---|
| Specialty | Occupational Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 03/22/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
229
Total Claims
$13K
Total Drug Cost
20
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 469
- Total Day Supply
- 13,078
- Generic Drug Cost
- $4K
- Opioid Claims
- 73 (31.9% rate)
Patient Demographics
- Average Patient Age
- 72.3 years
- Avg HCC Risk Score
- 0.90
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Dennis Thrasher, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
49 claims
- Metformin Hcl 16
Metformin Hcl
16 claims
- Gabapentin 14
Gabapentin
14 claims
- Levothyroxine Sodium 14
Levothyroxine Sodium
14 claims
- Amlodipine Besylate 13
Amlodipine Besylate
13 claims
- Oxycodone Hcl 12
Oxycodone Hcl
12 claims
- Tramadol Hcl 12
Tramadol Hcl
12 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 49 |
| Metformin Hcl | 16 |
| Gabapentin | 14 |
| Levothyroxine Sodium | 14 |
| Amlodipine Besylate | 13 |
| Oxycodone Hcl | 12 |
| Tramadol Hcl | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Occupational Medicine Physician Overview
How Dennis Thrasher, MD fits within the Occupational Medicine Physician landscape nationally.
2,230
Occupational Medicine Physician Providers in US
52
States with Occupational Medicine Physician
605
Avg Claims per Provider
Dennis Thrasher, MD's 229 claims are below the specialty average of 605.
Nearby Occupational Medicine Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Thrasher.
Dr. Rosalie Banasiak
MD
Phoenix, AZ
Dr. Laura Bayne
MD
Tucson, AZ
Dr. Donald Bucklin
M.D.
Scottsdale, AZ
Dr. Nicolau Chamma
M.D.
Phoenix, AZ
Dr. Ngoc Chau
M.D.
Phoenix, AZ
Compare Occupational Medicine 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 Arizona medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Occupational Medicine 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
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How to Find a Doctor
Step-by-step guide to choosing a provider
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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 Arizona
Frequently Asked Questions
What is Dennis Thrasher, MD's specialty? ▼
Dennis Thrasher, MD specializes in Occupational Medicine Physician and practices in Tucson, Arizona. Credentials: MD.
How much does Dennis Thrasher, MD prescribe under Medicare Part D? ▼
In 2023, Dennis Thrasher, MD wrote 229 Medicare Part D claims totaling $13K in drug costs for 20 beneficiaries.
Where is Dennis Thrasher, MD located? ▼
Dennis Thrasher, MD is located at 3681 S PALO VERDE RD, Tucson, AZ, 85713. Phone: (520) 750-8855.
What is Dennis Thrasher, MD's NPI number? ▼
Dennis Thrasher, MD's National Provider Identifier (NPI) is 1861451379, issued on 03/22/2006.
Does Dennis Thrasher, MD prescribe opioids? ▼
Yes, Dennis Thrasher, MD had 73 opioid claims in 2023 with an opioid prescribing rate of 31.9%.
How many Occupational Medicine Physician providers are there in the US? ▼
There are 2,230 Occupational Medicine Physician providers across 52 states in the US. The average Occupational Medicine Physician provider writes 605 Medicare Part D claims per year.
What drugs does Dennis Thrasher, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Dennis Thrasher, MD's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Metformin Hcl, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dennis Thrasher, MD accept Medicare? ▼
Dennis Thrasher, MD appears in CMS Medicare data with 229 Part D claims and 20 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dennis Thrasher, MD's credentials? ▼
Dennis Thrasher, MD's NPI is 1861451379 with credentials MD. 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.
- 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
Compiled from official public sources by the PlainDoctor editorial team.