2026 NPPES data Occupational Medicine Physician NPI 1861451379 MD
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DENNIS THRASHER, MD

Occupational Medicine Physician in TUCSON, Arizona. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
229
Medicare Part D claims · 20 beneficiaries · Occupational Medicine Physician avg: 605
What the federal data reveals: DENNIS THRASHER, MD is a Occupational Medicine Physician ([object Object]) practicing in TUCSON, Arizona with a Medicare Part D prescribing footprint of 229 claims across 20 beneficiaries .

What stands out: DENNIS THRASHER, MD filed 229 Medicare Part D claims in 2023 across TUCSON, Arizona. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

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).

DENNIS THRASHER, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 03/22/2006

NPI 1861451379

Primary specialty

Occupational Medicine Physician

Niche

2,230 US NPIs in this specialty

Medicare Part D claims

229 62% vs specialty avg

2023 prescription claims

Specialty avg: 605

Specialty distribution in Arizona

How Occupational Medicine Physician compares to other specialties among Arizona providers

Arizona providers

Occupational Medicine Physician share within Arizona

1. Occupational Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Occupational Medicine Physician share within Arizona

Specialty board-certification context

Estimated specialty board-certified rate — Occupational Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Occupational Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Occupational Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Occupational Medicine Physician) — ABMS / AOA estimate

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 is a Occupational Medicine Physician provider practicing in TUCSON, Arizona, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1861451379. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

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. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what THRASHER most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

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%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

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

3681 S PALO VERDE RD
TUCSON, AZ 85713

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.

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.

Compare Occupational Medicine Physician nationally: see state-by-state distribution →

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

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