NPI registry status
Active
2026 NPPES data Pediatric Urology Physician NPI 1144291527 MD
Verify on CMS → Timothy Duffin, MD
Pediatric Urology Physician in Clarksville, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 348 in Pediatric 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 · 347 beneficiaries · Pediatric Urology Physician avg: 654
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$177.01
4 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
Timothy Duffin, MD filed 1,198 Medicare Part D claims in 2023 as a Pediatric Urology Physician in Clarksville, Tennessee, prescribing 90% generic.
- 1K
- Part D claims, 2023
- 90%
- generic prescribing
- $177.01
- industry payments (Sunshine Act)
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.
Timothy Duffin, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,198 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-eligible specialty (heuristic, not verified)
Timothy Duffin, 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 Timothy Duffin, MD?
Quality data not reportedPrimary specialty
Pediatric Urology Physician
Medicare Part D claims
1,198 83% vs specialty avg
Specialty distribution in Tennessee
How Pediatric Urology Physician compares to other specialties among Tennessee 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 Pediatric 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).
Timothy Duffin, MD appears in the CMS NPPES registry as a Pediatric Urology Physician provider holding MD credentials at 800 WEATHERLY DR STE 100L, Clarksville, TN, 37043, with a listed phone of (931) 553-2800. NPI 1144291527 was issued on 02/01/2006.
Medicare Part D records for calendar year 2023 show 1,198 prescription claims written by this provider, covering 347 Medicare beneficiaries and totaling roughly $99K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 2.1%.
Pediatric Urology Physician is a narrow specialty nationwide, with 348 enrolled providers across 43 states and an average of 654 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 | 1144291527 |
|---|---|
| Specialty | Pediatric Urology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 02/01/2006 |
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 Timothy Duffin, MD. Source: openpaymentsdata.cms.gov.
Total received
$177
Largest payer
Stryker 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
Timothy Duffin, MD - brand share 10.0%
Pediatric Urology Physician average
10% brand-name claims vs 90% generic, on 1,198 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.
1,198
Total Claims
$99K
Total Drug Cost
347
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,495
- Total Day Supply
- 68,514
- Brand vs Generic
- 10% brand / 90% generic
- Brand Drug Cost
- $68K
- Generic Drug Cost
- $30K
- Opioid Claims
- 25 (2.1% rate)
- Antibiotic Claims
- 236
Patient Demographics
- Average Patient Age
- 75.1 years
- Avg HCC Risk Score
- 1.18
- Gender Split
- 22% female / 78% male
- Age Distribution
- <65: 12, 65-74: 150, 75-84: 143, 85+: 42
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Timothy Duffin, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tamsulosin Hcl
Tamsulosin Hcl
365 claims
- Finasteride 144
Finasteride
144 claims
- Myrbetriq 75
Myrbetriq
75 claims
- Oxybutynin Chlorid… 70
Oxybutynin Chloride Er
70 claims
- Levofloxacin 65
Levofloxacin
65 claims
- Oxybutynin Chloride 65
Oxybutynin Chloride
65 claims
- Cephalexin 58
Cephalexin
58 claims
- Nitrofurantoin Mon… 57
Nitrofurantoin Mono-Macro
57 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 365 |
| Finasteride | 144 |
| Myrbetriq Mirabegron | 75 |
| Oxybutynin Chloride Er Oxybutynin Chloride | 70 |
| Levofloxacin | 65 |
| Oxybutynin Chloride | 65 |
| Cephalexin | 58 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 57 |
| Alfuzosin Hcl Er Alfuzosin Hcl | 47 |
| Solifenacin Succinate | 33 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pediatric Urology Physician Overview
How Timothy Duffin, MD fits within the Pediatric Urology Physician landscape nationally.
348
Pediatric Urology Physician Providers in US
43
States with Pediatric Urology Physician
654
Avg Claims per Provider
Timothy Duffin, MD's 1,198 claims are above the specialty average of 654.
Nearby Pediatric Urology Physician Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Duffin.
Dr. Beth Andersen
MD
Knoxville, TN
Dr. Herbert Braren
MD
Nashville, TN
Dr. Dana Giel
M.D.
Memphis, TN
Dr. Joseph Gleason
M.D.
Germantown, TN
Dr. Daniel Herz
M.D.
Chattanooga, TN
Compare Pediatric 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 Tennessee medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pediatric 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.
Healthcare Guides
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How to Find a Doctor
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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 Tennessee
Frequently Asked Questions
What is Timothy Duffin, MD's specialty? ▼
Timothy Duffin, MD specializes in Pediatric Urology Physician and practices in Clarksville, Tennessee. Credentials: MD.
How much does Timothy Duffin, MD prescribe under Medicare Part D? ▼
In 2023, Timothy Duffin, MD wrote 1,198 Medicare Part D claims totaling $99K in drug costs for 347 beneficiaries.
Where is Timothy Duffin, MD located? ▼
Timothy Duffin, MD is located at 800 WEATHERLY DR STE 100L, Clarksville, TN, 37043. Phone: (931) 553-2800.
What is Timothy Duffin, MD's NPI number? ▼
Timothy Duffin, MD's National Provider Identifier (NPI) is 1144291527, issued on 02/01/2006.
Does Timothy Duffin, MD prescribe more brand-name or generic drugs? ▼
Timothy Duffin, MD's prescribing is 10% brand-name and 90% generic drugs by claim count, with $68K in brand drug costs.
Does Timothy Duffin, MD prescribe opioids? ▼
Yes, Timothy Duffin, MD had 25 opioid claims in 2023 with an opioid prescribing rate of 2.1%.
How many Pediatric Urology Physician providers are there in the US? ▼
There are 348 Pediatric Urology Physician providers across 43 states in the US. The average Pediatric Urology Physician provider writes 654 Medicare Part D claims per year.
What drugs does Timothy Duffin, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Timothy Duffin, MD'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 Timothy Duffin, MD accept Medicare? ▼
Timothy Duffin, MD appears in CMS Medicare data with 1,198 Part D claims and 347 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Timothy Duffin, MD's credentials? ▼
Timothy Duffin, MD's NPI is 1144291527 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.