NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1255492211 MD
Verify on CMS → David Duke, MD
Internal Medicine Physician in Nacogdoches, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal 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
3K
Medicare Part D claims · 77 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
85%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
93.2/100
▲ 10 pts above national avg 83.1 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
David Duke, MD reported a CMS MIPS final score of 93.2/100 - above the 83.1 national average - and filed 2,531 Medicare Part D claims in 2023.
- 93.2/100
- MIPS score · +10 vs avg
- 3K
- Part D claims, 2023
- 85%
- 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.
David Duke, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
93 Top 29% higher than 71% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where David Duke, MD sits
This provider among internal medicine physician peers
Across the 36,260 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, David Duke, MD writes more Part D claims than 69% of them and scores higher on MIPS quality than 72% - placing this provider in the high-volume, high-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 internal medicine physician peer from a representative sample of 60; the gold marker is David Duke, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
David Duke, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 David Duke, MD?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
2,531 7% vs specialty avg
MIPS final score
93.2/100 10.1 pts vs avg
Specialty distribution in Texas
How Internal Medicine Physician compares to other specialties among Texas providers
Medicare quality performance, MIPS
David Duke, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 93.2/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 93.2/100 vs national avg 83.1
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).
David Duke, MD appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD credentials at 1216 RAGUET, Nacogdoches, TX, 75961, with a listed phone of (936) 560-5537. NPI 1255492211 was issued on 12/13/2006.
Medicare Part D records for calendar year 2023 show 2,531 prescription claims written by this provider, covering 77 Medicare beneficiaries and totaling roughly $362K in drug spend, split 14% brand-name and 85% generic by claim count, with an opioid prescribing rate of 1.4%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 93.2/100 for the 2023 performance year (Quality 90.7, Cost 86.7), compared with the national average of 83.1.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1255492211 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 12/13/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
93.2083
Final Score
Avg: 83.1
90.7085
Quality
86.6525
Cost
100
Promoting Interoperability
Reporting: Individual
License & disciplinary context - Texas TMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~77K Texas medical licensees in 2023 - they are NOT specific to David Duke, MD. To verify David Duke, MD's current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
David Duke, MD - brand share 14.0%
Internal Medicine Physician average
14% brand-name claims vs 85% generic, on 2,531 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.
2,531
Total Claims
$362K
Total Drug Cost
77
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,865
- Total Day Supply
- 143,836
- Brand vs Generic
- 14% brand / 85% generic
- Brand Drug Cost
- $296K
- Generic Drug Cost
- $64K
- Opioid Claims
- 35 (1.4% rate)
- Antibiotic Claims
- 72
Patient Demographics
- Average Patient Age
- 75.1 years
- Avg HCC Risk Score
- 0.97
- Gender Split
- 45% female / 55% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What David Duke, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Allopurinol
Allopurinol
99 claims
- Meloxicam
Meloxicam
81 claims
- Atorvastatin Calcium
Atorvastatin Calcium
80 claims
- Finasteride
Finasteride
79 claims
- Levothyroxine Sodium
Levothyroxine Sodium
76 claims
- Omeprazole
Omeprazole
65 claims
- Tamsulosin Hcl
Tamsulosin Hcl
62 claims
- Metoprolol Succinate
Metoprolol Succinate
57 claims
| Drug | Claims |
|---|---|
| Allopurinol | 99 |
| Meloxicam | 81 |
| Atorvastatin Calcium | 80 |
| Finasteride | 79 |
| Levothyroxine Sodium | 76 |
| Omeprazole | 65 |
| Tamsulosin Hcl | 62 |
| Metoprolol Succinate | 57 |
| Metformin Hcl Er Metformin Hcl | 49 |
| Azelastine Hcl | 48 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How David Duke, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
David Duke, MD's 2,531 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Duke.
Dr. Muhammad A. Sattar
MD
Dallas, TX
Anunaya Aashish
Denton, TX
Dr. Queenie Ann Abad
M.D.
San Antonio, TX
Dr. Fuad Abaleka
M.D
Lubbock, TX
Dr. Carol Abalihi
M.D.
El Paso, TX
Compare Internal 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 Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal 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.
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Frequently Asked Questions
What is David Duke, MD's specialty? ▼
David Duke, MD specializes in Internal Medicine Physician and practices in Nacogdoches, Texas. Credentials: MD.
How much does David Duke, MD prescribe under Medicare Part D? ▼
In 2023, David Duke, MD wrote 2,531 Medicare Part D claims totaling $362K in drug costs for 77 beneficiaries.
What is David Duke, MD's Medicare quality score? ▼
David Duke, MD has a CMS MIPS Final Score of 93.2/100 (Quality: 90.7, Cost: 86.7). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is David Duke, MD located? ▼
David Duke, MD is located at 1216 RAGUET, Nacogdoches, TX, 75961. Phone: (936) 560-5537.
What is David Duke, MD's NPI number? ▼
David Duke, MD's National Provider Identifier (NPI) is 1255492211, issued on 12/13/2006.
Does David Duke, MD prescribe more brand-name or generic drugs? ▼
David Duke, MD's prescribing is 14% brand-name and 85% generic drugs by claim count, with $296K in brand drug costs.
Does David Duke, MD prescribe opioids? ▼
Yes, David Duke, MD had 35 opioid claims in 2023 with an opioid prescribing rate of 1.4%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does David Duke, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, David Duke, MD's most frequently prescribed drugs include Allopurinol, Meloxicam, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does David Duke, MD accept Medicare? ▼
David Duke, MD appears in CMS Medicare data with 2,531 Part D claims and 77 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify David Duke, MD's credentials? ▼
David Duke, MD's NPI is 1255492211 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.
- 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.