2026 NPPES data Specialist NPI 1609838218 MD
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THOMAS KNOX, MD

Specialist in WEST HARTFORD, Connecticut. 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 · 431 beneficiaries · Specialist avg: 1K
Industry payments
$1.6K
62 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: THOMAS KNOX, MD is a Specialist ([object Object]) practicing in WEST HARTFORD, Connecticut with a Medicare Part D prescribing footprint of 4K claims across 431 beneficiaries . Industry payments of $1.6K across 62 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: THOMAS KNOX, MD filed 3,934 Medicare Part D claims in 2023 across WEST HARTFORD, Connecticut. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

THOMAS KNOX, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 04/06/2006

NPI 1609838218

Primary specialty

Specialist

High-volume

69,658 US NPIs in this specialty

Medicare Part D claims

3,934 167% vs specialty avg

2023 prescription claims

Specialty avg: 1,474

Specialty distribution in Connecticut

How Specialist compares to other specialties among Connecticut providers

Connecticut providers

Specialist share within Connecticut

1. Specialist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Specialist share within Connecticut

Specialty board-certification context

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

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

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

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

THOMAS KNOX, MD is a Specialist provider practicing in WEST HARTFORD, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1609838218. 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.

THOMAS KNOX, MD appears in the CMS NPPES registry as a Specialist provider holding MD credentials at 345 N MAIN ST FL 1, WEST HARTFORD, CT, 06117, with a listed phone of (860) 547-1489. NPI 1609838218 was issued on 04/06/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KNOX 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 3,934 prescription claims written by this provider, covering 431 Medicare beneficiaries and totaling roughly $635K in drug spend, with an opioid prescribing rate of 3.2%. 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.

Specialist is a high-volume specialty nationwide, with 69,658 enrolled providers across 55 states and an average of 1,474 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

345 N MAIN ST FL 1
WEST HARTFORD, CT 06117

Provider Details

NPI 1609838218
Specialty Specialist
Credentials MD
Gender Male
NPI Issued 04/06/2006

Hospital and facility affiliations

Facilities where THOMAS KNOX, MD 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.

EASTERN CONNECTICUT CARDIOLOGY ASSOCIATES LLC
MANCHESTER, CT
TRINITY HEALTH OF NEW ENGLAND PROVIDER NETWORK ORGANIZATION INC
HARTFORD, CT

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for THOMAS KNOX, MD. Source: openpaymentsdata.cms.gov.

Total received

$1.6K

Largest payer

Merck Sharp & Dohme LLC

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

3,934
Total Claims
$635K
Total Drug Cost
431
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
8,545
Total Day Supply
251,378
Generic Drug Cost
$100K
Opioid Claims
125 (3.2% rate)
Antibiotic Claims
16

Patient Demographics

Average Patient Age
73.4 years
Avg HCC Risk Score
1.68
Gender Split
54% female / 46% male
Age Distribution
<65: 53, 65-74: 185, 75-84: 145, 85+: 48

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Metoprolol Succinate
289
Atorvastatin Calcium
250
Losartan Potassium
234
Xarelto
Rivaroxaban
232
Amlodipine Besylate
230
Clopidogrel
Clopidogrel Bisulfate
185
Furosemide
166
Eliquis
Apixaban
129
Metoprolol Tartrate
123
Carvedilol
109

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

Specialist Overview

How THOMAS KNOX, MD fits within the Specialist landscape nationally.

69,658
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider

THOMAS KNOX, MD's 3,934 claims are above the specialty average of 1,474.

Nearby Specialist Providers in Connecticut

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

Compare Specialist nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS KNOX, MD's specialty?
THOMAS KNOX, MD specializes in Specialist and practices in WEST HARTFORD, Connecticut. Credentials: MD.
How much does THOMAS KNOX, MD prescribe under Medicare Part D?
In 2023, THOMAS KNOX, MD wrote 3,934 Medicare Part D claims totaling $635K in drug costs for 431 beneficiaries.
Where is THOMAS KNOX, MD located?
THOMAS KNOX, MD is located at 345 N MAIN ST FL 1, WEST HARTFORD, CT, 06117. Phone: (860) 547-1489.
What is THOMAS KNOX, MD's NPI number?
THOMAS KNOX, MD's National Provider Identifier (NPI) is 1609838218, issued on 04/06/2006.
Does THOMAS KNOX, MD prescribe opioids?
Yes, THOMAS KNOX, MD had 125 opioid claims in 2023 with an opioid prescribing rate of 3.2%.
How many Specialist providers are there in the US?
There are 69,658 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does THOMAS KNOX, MD prescribe most often?
Based on 2023 Medicare Part D data, THOMAS KNOX, MD's most frequently prescribed drugs include Metoprolol Succinate, Atorvastatin Calcium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS KNOX, MD accept Medicare?
THOMAS KNOX, MD appears in CMS Medicare data with 3,934 Part D claims and 431 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS KNOX, MD's credentials?
THOMAS KNOX, MD's NPI is 1609838218 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

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