NPI registry status
Active
2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1023158268 M.D.
Verify on CMS → Stuart Lewis, M.D.
Geriatric Medicine (Internal Medicine) Physician in Lebanon, New Hampshire.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 4,171 in Geriatric Medicine (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
7K
Medicare Part D claims · 425 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
84%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
69.4/100
▼ 14 pts below national avg 83.5 · Mid-tier
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Stuart Lewis, M.D. reported a CMS MIPS final score of 69.4/100 - below the 83.5 national average - and filed 6,647 Medicare Part D claims in 2023.
- 69.4/100
- MIPS score · -14 vs avg
- 7K
- Part D claims, 2023
- 84%
- 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.
Stuart Lewis, M.D.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
69 ≥ 8th percentile 8% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Stuart Lewis, M.D. sits
This provider among geriatric medicine (internal medicine) physician peers
Across the 686 geriatric medicine (internal medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Stuart Lewis, M.D. writes more Part D claims than 77% of them and scores higher on MIPS quality than 12% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one geriatric medicine (internal medicine) physician peer from a representative sample of 60; the gold marker is Stuart Lewis, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Stuart Lewis, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Stuart Lewis, M.D.?
Below national averagePrimary specialty
Geriatric Medicine (Internal Medicine) Physician
Medicare Part D claims
6,647 49% vs specialty avg
MIPS final score
69.4/100 14.1 pts vs avg
Specialty distribution in New Hampshire
How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among New Hampshire providers
Medicare quality performance, MIPS
Stuart Lewis, M.D.'s 2023 MIPS final score plotted against the Geriatric Medicine (Internal Medicine) Physician national average
- MIPS Final Score
- 69.4/100
- vs 83.5 national avg · 2023 performance year
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).
Stuart Lewis, M.D. appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding M.D. credentials at 1 MEDICAL CENTER DR, Lebanon, NH, 03756, with a listed phone of (603) 653-9500. NPI 1023158268 was issued on 02/07/2007.
Medicare Part D records for calendar year 2023 show 6,647 prescription claims written by this provider, covering 425 Medicare beneficiaries and totaling roughly $634K in drug spend, split 15% brand-name and 84% generic by claim count, with an opioid prescribing rate of 1.0%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 69.4/100 for the 2023 performance year (Quality 55.6, Cost 42.4), compared with the 83.5 average among clinicians with a measured score.
Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,171 enrolled providers across 52 states and an average of 4,450 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 | 1023158268 |
|---|---|
| Specialty | Geriatric Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/07/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
69.4014
Final Score
Measured-score avg: 83.5
55.6429
Quality
42.3618
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Stuart Lewis, M.D. 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.
Mary Hitchcock Memorial Hospital
★★★☆☆ 3/5
Lebanon, NH
Acute Care Hospitals
CMS CCN: 300003
Dartmouth-Hitchcock Clinic
Windsor, VT
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Stuart Lewis, M.D. - brand share 15.0%
Geriatric Medicine (Internal Medicine) Physician average
15% brand-name claims vs 84% generic, on 6,647 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.
6,647
Total Claims
$634K
Total Drug Cost
425
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 10,606
- Total Day Supply
- 279,279
- Brand vs Generic
- 15% brand / 84% generic
- Brand Drug Cost
- $450K
- Generic Drug Cost
- $180K
- Opioid Claims
- 67 (1.0% rate)
- Antibiotic Claims
- 103
Patient Demographics
- Average Patient Age
- 81.1 years
- Avg HCC Risk Score
- 1.66
- Gender Split
- 64% female / 36% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Stuart Lewis, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
428 claims
- Metoprolol Succinate
Metoprolol Succinate
319 claims
- Levothyroxine Sodium
Levothyroxine Sodium
228 claims
- Amlodipine Besylate
Amlodipine Besylate
219 claims
- Warfarin Sodium
Warfarin Sodium
196 claims
- Eliquis
Eliquis
194 claims
- Gabapentin
Gabapentin
190 claims
- Losartan Potassium
Losartan Potassium
183 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 428 |
| Metoprolol Succinate | 319 |
| Levothyroxine Sodium | 228 |
| Amlodipine Besylate | 219 |
| Warfarin Sodium | 196 |
| Eliquis Apixaban | 194 |
| Gabapentin | 190 |
| Losartan Potassium | 183 |
| Lisinopril | 174 |
| Tamsulosin Hcl | 153 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Internal Medicine) Physician in NH →
All providers in New Hampshire →
Compare specialties →
Geriatric Medicine (Internal Medicine) Physician Overview
How Stuart Lewis, M.D. fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.
4,171
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider
Stuart Lewis, M.D.'s 6,647 claims are above the specialty average of 4,450.
Nearby Geriatric Medicine (Internal Medicine) Physician Providers in New Hampshire
Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as Lewis.
One of 31 Geriatric Medicine (Internal Medicine) Physician providers enrolled in New Hampshire, 5 are shown here.
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 New Hampshire medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Geriatric Medicine (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 Stuart Lewis, M.D.'s specialty? ▼
Stuart Lewis, M.D. specializes in Geriatric Medicine (Internal Medicine) Physician and practices in Lebanon, New Hampshire. Credentials: M.D..
How much does Stuart Lewis, M.D. prescribe under Medicare Part D? ▼
In 2023, Stuart Lewis, M.D. wrote 6,647 Medicare Part D claims totaling $634K in drug costs for 425 beneficiaries.
What is Stuart Lewis, M.D.'s Medicare quality score? ▼
Stuart Lewis, M.D. has a CMS MIPS Final Score of 69.4/100 (Quality: 55.6, Cost: 42.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Stuart Lewis, M.D. located? ▼
Stuart Lewis, M.D. is located at 1 MEDICAL CENTER DR, Lebanon, NH, 03756. Phone: (603) 653-9500.
What is Stuart Lewis, M.D.'s NPI number? ▼
Stuart Lewis, M.D.'s National Provider Identifier (NPI) is 1023158268, issued on 02/07/2007.
Does Stuart Lewis, M.D. prescribe more brand-name or generic drugs? ▼
Stuart Lewis, M.D.'s prescribing is 15% brand-name and 84% generic drugs by claim count, with $450K in brand drug costs.
Does Stuart Lewis, M.D. prescribe opioids? ▼
Yes, Stuart Lewis, M.D. had 67 opioid claims in 2023 with an opioid prescribing rate of 1.0%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 4,171 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does Stuart Lewis, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Stuart Lewis, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Metoprolol Succinate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stuart Lewis, M.D. accept Medicare? ▼
Stuart Lewis, M.D. appears in CMS Medicare data with 6,647 Part D claims and 425 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stuart Lewis, M.D.'s credentials? ▼
Stuart Lewis, M.D.'s NPI is 1023158268 with credentials M.D.. 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.