NPI registry status
Active
2026 NPPES data Urology Physician NPI 1245619543
Verify on CMS → Dennis Thum
Urology Physician in Sioux Falls, South Dakota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 13,367 in Urology 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
1K
Medicare Part D claims · 278 beneficiaries · Urology Physician avg: 1K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$198.76
5 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Dennis Thum filed 1,146 Medicare Part D claims in 2023 as a Urology Physician in Sioux Falls, South Dakota, prescribing 90% generic.
- 1K
- Part D claims, 2023
- 90%
- 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.
Dennis Thum's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,146 Top 23% higher than 77% 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 certification likely (heuristic, not verified)
Dennis Thum practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Dennis Thum?
Quality data not reportedPrimary specialty
Urology Physician
Medicare Part D claims
1,146 10% vs specialty avg
Specialty distribution in South Dakota
How Urology Physician compares to other specialties among South Dakota 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 Urology 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 Thum appears in the CMS NPPES registry as a Urology Physician provider at 201 W 69TH ST, Sioux Falls, SD, 57108, with a listed phone of (605) 336-0635. NPI 1245619543 was issued on 05/20/2015.
Medicare Part D records for calendar year 2023 show 1,146 prescription claims written by this provider, covering 278 Medicare beneficiaries and totaling roughly $75K in drug spend, split 10% brand-name and 90% generic by claim count.
Urology Physician is a mid-sized specialty nationwide, with 13,367 enrolled providers across 54 states and an average of 1,280 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 | 1245619543 |
|---|---|
| Specialty | Urology Physician |
| Gender | Male |
| NPI Issued | 05/20/2015 |
Hospital and facility affiliations
Facilities where Dennis Thum 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.
Sanford Health Network
Worthington, MN
Urology Specialists Chartered
Sioux Falls, SD
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 Dennis Thum. Source: openpaymentsdata.cms.gov.
Total received
$199
Largest payer
PROCEPT BioRobotics Corporation
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 · Typical
Dennis Thum - brand share 10.0%
Urology Physician average
10% brand-name claims vs 90% generic, on 1,146 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.
1,146
Total Claims
$75K
Total Drug Cost
278
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,126
- Total Day Supply
- 60,388
- Brand vs Generic
- 10% brand / 90% generic
- Brand Drug Cost
- $45K
- Generic Drug Cost
- $31K
- Antibiotic Claims
- 85
Patient Demographics
- Average Patient Age
- 74.3 years
- Avg HCC Risk Score
- 1.33
- Gender Split
- 19% female / 81% male
- Age Distribution
- <65: 24, 65-74: 118, 75-84: 103, 85+: 33
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Dennis Thum prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tamsulosin Hcl
Tamsulosin Hcl
598 claims
- Finasteride 143
Finasteride
143 claims
- Myrbetriq 90
Myrbetriq
90 claims
- Methenamine Hippur… 70
Methenamine Hippurate
70 claims
- Potassium Citrate Er 37
Potassium Citrate Er
37 claims
- Cephalexin 29
Cephalexin
29 claims
- Sulfamethoxazole-T… 26
Sulfamethoxazole-Trimethoprim
26 claims
- Nitrofurantoin Mon… 18
Nitrofurantoin Mono-Macro
18 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 598 |
| Finasteride | 143 |
| Myrbetriq Mirabegron | 90 |
| Methenamine Hippurate | 70 |
| Potassium Citrate Er Potassium Citrate | 37 |
| Cephalexin | 29 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 26 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 18 |
| Oxybutynin Chloride Er Oxybutynin Chloride | 15 |
| Estradiol | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Urology Physician Overview
How Dennis Thum fits within the Urology Physician landscape nationally.
13,367
Urology Physician Providers in US
54
States with Urology Physician
1,280
Avg Claims per Provider
Dennis Thum's 1,146 claims are below the specialty average of 1,280.
Nearby Urology Physician Providers in South Dakota
Other clinicians with the same primary specialty enrolled in South Dakota, drawn from the same CMS NPPES roster as Thum.
Dr. Christopher Adducci
MD
Watertown, SD
Dr. Adam Althaus
M.D.
Dakota Dunes, SD
Dr. David Arend
MD
Sioux Falls, SD
Dr. Dileep Bhat
M D
Mitchell, SD
Dr. Nathan Bockholt
M.D.
Sioux Falls, SD
Compare Urology 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 South Dakota medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Urology 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.
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Explore South Dakota
Frequently Asked Questions
What is Dennis Thum's specialty? ▼
Dennis Thum specializes in Urology Physician and practices in Sioux Falls, South Dakota.
How much does Dennis Thum prescribe under Medicare Part D? ▼
In 2023, Dennis Thum wrote 1,146 Medicare Part D claims totaling $75K in drug costs for 278 beneficiaries.
Where is Dennis Thum located? ▼
Dennis Thum is located at 201 W 69TH ST, Sioux Falls, SD, 57108. Phone: (605) 336-0635.
What is Dennis Thum's NPI number? ▼
Dennis Thum's National Provider Identifier (NPI) is 1245619543, issued on 05/20/2015.
Does Dennis Thum prescribe more brand-name or generic drugs? ▼
Dennis Thum's prescribing is 10% brand-name and 90% generic drugs by claim count, with $45K in brand drug costs.
How many Urology Physician providers are there in the US? ▼
There are 13,367 Urology Physician providers across 54 states in the US. The average Urology Physician provider writes 1,280 Medicare Part D claims per year.
What drugs does Dennis Thum prescribe most often? ▼
Based on 2023 Medicare Part D data, Dennis Thum's most frequently prescribed drugs include Tamsulosin Hcl, Finasteride, Myrbetriq. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dennis Thum accept Medicare? ▼
Dennis Thum appears in CMS Medicare data with 1,146 Part D claims and 278 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dennis Thum's credentials? ▼
Dennis Thum's NPI is 1245619543. 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.
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.