2026 NPPES data Internal Medicine Physician NPI 1194836791 M.D.
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BRYAN LEWIS, M.D.

Internal Medicine Physician in TOPSHAM, Maine. 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
4K
Medicare Part D claims · 381 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

BRYAN LEWIS, M.D. filed 3,738 Medicare Part D claims in 2023 as a Internal Medicine Physician in TOPSHAM, Maine, prescribing 90% generic.

4K
Part D claims, 2023
90%
generic prescribing

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.

BRYAN LEWIS, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

3,738 Top 9% higher than 91% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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)

BRYAN LEWIS, M.D. 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 BRYAN LEWIS, M.D.?

Quality data not reported

NPI registry status

Active

Issued 08/31/2006

NPI 1194836791

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

3,738 38% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Maine

How Internal Medicine Physician compares to other specialties among Maine providers

Maine providers

Internal Medicine Physician share within Maine

1. Internal Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Internal Medicine Physician share within Maine

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Internal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

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).

BRYAN LEWIS, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 1 WELLNESS WAY STE A, TOPSHAM, ME, 04086, with a listed phone of (207) 406-7600. NPI 1194836791 was issued on 08/31/2006. 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 3,738 prescription claims written by this provider, covering 381 Medicare beneficiaries and totaling roughly $378K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 4.0%. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 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

1 WELLNESS WAY STE A
TOPSHAM, ME 04086

Provider Details

NPI 1194836791
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 08/31/2006

Brand vs generic prescribing mix · Typical

BRYAN LEWIS, M.D. — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 3,738 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.

3,738
Total Claims
$378K
Total Drug Cost
381
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
8,355
Total Day Supply
241,281
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$306K
Generic Drug Cost
$70K
Opioid Claims
151 (4.0% rate)
Antibiotic Claims
66

Patient Demographics

Average Patient Age
74.3 years
Avg HCC Risk Score
1.04
Gender Split
58% female / 42% male
Age Distribution
<65: 30, 65-74: 171, 75-84: 123, 85+: 57

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What BRYAN 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
198
Amlodipine Besylate
176
Omeprazole
151
Losartan Potassium
146
Lisinopril
133
Levothyroxine Sodium
131
Rosuvastatin Calcium
125
Gabapentin
114
Metoprolol Succinate
96
Hydrochlorothiazide
64

* 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 BRYAN LEWIS, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

BRYAN LEWIS, M.D.'s 3,738 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Maine

Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as LEWIS.

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

Frequently Asked Questions

What is BRYAN LEWIS, M.D.'s specialty?
BRYAN LEWIS, M.D. specializes in Internal Medicine Physician and practices in TOPSHAM, Maine. Credentials: M.D..
How much does BRYAN LEWIS, M.D. prescribe under Medicare Part D?
In 2023, BRYAN LEWIS, M.D. wrote 3,738 Medicare Part D claims totaling $378K in drug costs for 381 beneficiaries.
Where is BRYAN LEWIS, M.D. located?
BRYAN LEWIS, M.D. is located at 1 WELLNESS WAY STE A, TOPSHAM, ME, 04086. Phone: (207) 406-7600.
What is BRYAN LEWIS, M.D.'s NPI number?
BRYAN LEWIS, M.D.'s National Provider Identifier (NPI) is 1194836791, issued on 08/31/2006.
Does BRYAN LEWIS, M.D. prescribe more brand-name or generic drugs?
BRYAN LEWIS, M.D.'s prescribing is 10% brand-name and 90% generic drugs by claim count, with $306K in brand drug costs.
Does BRYAN LEWIS, M.D. prescribe opioids?
Yes, BRYAN LEWIS, M.D. had 151 opioid claims in 2023 with an opioid prescribing rate of 4.0%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 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 BRYAN LEWIS, M.D. prescribe most often?
Based on 2023 Medicare Part D data, BRYAN LEWIS, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BRYAN LEWIS, M.D. accept Medicare?
BRYAN LEWIS, M.D. appears in CMS Medicare data with 3,738 Part D claims and 381 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BRYAN LEWIS, M.D.'s credentials?
BRYAN LEWIS, M.D.'s NPI is 1194836791 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.
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