2026 NPPES data Hospitalist Physician NPI 1689105652 M.D.
Verify on CMS →

LOUIS BASSETT PORTER, M.D.

Hospitalist Physician in BURLINGTON, Vermont. 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
194
Medicare Part D claims · 90 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: LOUIS BASSETT PORTER, M.D. is a Hospitalist Physician ([object Object]) practicing in BURLINGTON, Vermont with a Medicare Part D prescribing footprint of 194 claims across 90 beneficiaries — 10% brand-name prescribing .

What the federal data shows

LOUIS BASSETT PORTER, M.D. filed 194 Medicare Part D claims in 2023 as a Hospitalist Physician in BURLINGTON, Vermont, prescribing 90% generic.

194
Part D claims, 2023
90%
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.

Board certification likely (heuristic — not verified)

LOUIS BASSETT PORTER, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

LOUIS BASSETT PORTER, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 03/22/2017

NPI 1689105652

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

194 78% vs specialty avg

2023 prescription claims

Specialty avg: 888

Specialty distribution in Vermont

How Hospitalist Physician compares to other specialties among Vermont providers

Vermont providers

Hospitalist Physician share within Vermont

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Hospitalist 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).

LOUIS BASSETT PORTER, M.D. is a Hospitalist Physician provider practicing in BURLINGTON, Vermont, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1689105652. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

LOUIS BASSETT PORTER, M.D. appears in the CMS NPPES registry as a Hospitalist Physician provider holding M.D. credentials at UVMMC 111 COLCHESTER AVENUE, BURLINGTON, VT, 05401, with a listed phone of (802) 847-2345. NPI 1689105652 was issued on 03/22/2017. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what PORTER 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 194 prescription claims written by this provider, covering 90 Medicare beneficiaries and totaling roughly $11K in drug spend, split 10% brand-name and 90% generic by claim count. 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.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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

UVMMC 111 COLCHESTER AVENUE
BURLINGTON, VT 05401

Provider Details

NPI 1689105652
Specialty Hospitalist Physician
Credentials M.D.
Gender Male
NPI Issued 03/22/2017

Hospital and facility affiliations

Facilities where LOUIS BASSETT PORTER, 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.

HOMEDOC PC
DENVER, CO
INTERMOUNTAIN MEDICAL GROUP GRAND JUNCTION, LLC
GRAND JUNCTION, CO

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

LOUIS BASSETT PORTER, M.D. — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 194 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.

194
Total Claims
$11K
Total Drug Cost
90
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
376
Total Day Supply
9,906
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$7K
Generic Drug Cost
$4K
Antibiotic Claims
34

Patient Demographics

Average Patient Age
72.2 years
Avg HCC Risk Score
2.45
Gender Split
49% female / 51% male
Age Distribution
<65: 18, 65-74: 29, 75-84: 30, 85+: 13

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
19
Clopidogrel
Clopidogrel Bisulfate
15
Pantoprazole Sodium
15
Losartan Potassium
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Hospitalist Physician Overview

How LOUIS BASSETT PORTER, M.D. fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

LOUIS BASSETT PORTER, M.D.'s 194 claims are below the specialty average of 888.

Nearby Hospitalist Physician Providers in Vermont

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

Compare Hospitalist Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is LOUIS BASSETT PORTER, M.D.'s specialty?
LOUIS BASSETT PORTER, M.D. specializes in Hospitalist Physician and practices in BURLINGTON, Vermont. Credentials: M.D..
How much does LOUIS BASSETT PORTER, M.D. prescribe under Medicare Part D?
In 2023, LOUIS BASSETT PORTER, M.D. wrote 194 Medicare Part D claims totaling $11K in drug costs for 90 beneficiaries.
Where is LOUIS BASSETT PORTER, M.D. located?
LOUIS BASSETT PORTER, M.D. is located at UVMMC 111 COLCHESTER AVENUE, BURLINGTON, VT, 05401. Phone: (802) 847-2345.
What is LOUIS BASSETT PORTER, M.D.'s NPI number?
LOUIS BASSETT PORTER, M.D.'s National Provider Identifier (NPI) is 1689105652, issued on 03/22/2017.
Does LOUIS BASSETT PORTER, M.D. prescribe more brand-name or generic drugs?
LOUIS BASSETT PORTER, M.D.'s prescribing is 10% brand-name and 90% generic drugs by claim count, with $7K in brand drug costs.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does LOUIS BASSETT PORTER, M.D. prescribe most often?
Based on 2023 Medicare Part D data, LOUIS BASSETT PORTER, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Clopidogrel, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LOUIS BASSETT PORTER, M.D. accept Medicare?
LOUIS BASSETT PORTER, M.D. appears in CMS Medicare data with 194 Part D claims and 90 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LOUIS BASSETT PORTER, M.D.'s credentials?
LOUIS BASSETT PORTER, M.D.'s NPI is 1689105652 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