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. 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
7K
Medicare Part D claims · 425 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
69.4014/100
▼ 14 pts below national avg 83.1 · [object Object]

What the federal data shows

STUART LEWIS, M.D. reported a CMS MIPS final score of 69.4014/100 — below the 83.1 national average — and filed 6,647 Medicare Part D claims in 2023.

69.4014/100
MIPS score · -14 vs avg
7K
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.

STUART LEWIS, M.D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

69 8th percentile higher than 8% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). This entry sits in this band. 70–80: 118,074 scored providers (25%). Above this entry. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

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

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 average

NPI registry status

Active

Issued 02/07/2007

NPI 1023158268

Primary specialty

Geriatric Medicine (Internal Medicine) Physician

Niche

4,161 US NPIs in this specialty

Medicare Part D claims

6,647 49% vs specialty avg

2023 prescription claims

Specialty avg: 4,450

MIPS final score

69.4014/100 13.698599999999999% pts

Mid-tier band

vs 83.1 national avg

Specialty distribution in New Hampshire

How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among New Hampshire providers

New Hampshire providers

Geriatric Medicine (Internal Medicine) Physician share within New Hampshire

1. Geriatric Medicine (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Internal Medicine) Physician share within New Hampshire

Medicare quality performance — MIPS

STUART LEWIS, M.D.'s 2023 MIPS final score plotted against the Geriatric Medicine (Internal Medicine) Physician national average

Below national average
MIPS Final Score
69.4014/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Geriatric Medicine (Internal Medicine) Physician) — 69.4014/100 vs national avg 83.1

0%100%National avg83%69.4%
MIPS final score (Geriatric Medicine (Internal Medicine) Physician) — 69.4014/100 vs national avg 83.1

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. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LEWIS 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 6,647 prescription claims written by this provider, covering 425 Medicare beneficiaries and totaling roughly $634K in drug spend, split 15% brand-name and 85% generic by claim count, with an opioid prescribing rate of 1.0%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 69.4014/100 for the 2023 performance year (Quality 55.6429, Cost 42.3618), compared with the national average of 83.1.

Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,161 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

1 MEDICAL CENTER DR
LEBANON, NH 03756

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
Avg: 83.1
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%
Specialty average (est.)

15% brand-name claims vs 85% 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 / 85% 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

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
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.

Geriatric Medicine (Internal Medicine) Physician Overview

How STUART LEWIS, M.D. fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.

4,161
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.

Compare Geriatric Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

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 69.4014/100 (Quality: 55.6429, Cost: 42.3618). The national average MIPS Final Score is 83.1. 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 85% 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 4,161 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

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