2026 NPPES data Ophthalmology Physician NPI 1528064219 M.D.
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THOMAS STONE, M.D.

Ophthalmology Physician in LOUISVILLE, Kentucky. 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
474
Medicare Part D claims · 264 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
54%
generic claims · 46% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 17 pts above national avg 83.1 · [object Object]
Industry payments
$15.6K
67 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

THOMAS STONE, M.D. reported a CMS MIPS final score of 100/100 — above the 83.1 national average — and filed 474 Medicare Part D claims in 2023.

100/100
MIPS score · +17 vs avg
474
Part D claims, 2023
54%
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.

THOMAS STONE, 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

100 Top 7% higher than 93% 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%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. 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)

THOMAS STONE, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — 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 THOMAS STONE, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 06/27/2005

NPI 1528064219

Primary specialty

Ophthalmology Physician

Mid-sized

22,090 US NPIs in this specialty

Medicare Part D claims

474 67% vs specialty avg

2023 prescription claims

Specialty avg: 1,420

MIPS final score

100/100 16.900000000000006% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Kentucky

How Ophthalmology Physician compares to other specialties among Kentucky providers

Kentucky providers

Ophthalmology Physician share within Kentucky

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

Medicare quality performance — MIPS

THOMAS STONE, M.D.'s 2023 MIPS final score plotted against the Ophthalmology Physician national average

High performer (top quartile)
MIPS Final Score
100/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Ophthalmology Physician) — 100/100 vs national avg 83.1

0%100%National avg83%99%
MIPS final score (Ophthalmology Physician) — 100/100 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).

THOMAS STONE, M.D. appears in the CMS NPPES registry as a Ophthalmology Physician provider holding M.D. credentials at 6450 DUTCHMANS PKWY, LOUISVILLE, KY, 40205, with a listed phone of (859) 263-3900. NPI 1528064219 was issued on 06/27/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what STONE 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 474 prescription claims written by this provider, covering 264 Medicare beneficiaries and totaling roughly $23K in drug spend, split 46% brand-name and 54% 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 100/100 for the 2023 performance year (Quality 100), compared with the national average of 83.1.

Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 enrolled providers across 56 states and an average of 1,420 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

6450 DUTCHMANS PKWY
LOUISVILLE, KY 40205

Provider Details

NPI 1528064219
Specialty Ophthalmology Physician
Credentials M.D.
Gender Male
NPI Issued 06/27/2005

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

100
Final Score
Avg: 83.1
100
Quality

Reporting: Group practice

Hospital and facility affiliations

Facilities where THOMAS STONE, 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.

RETINA AND VITREOUS ASSOCIATES OF KENTUCKY PLLC
LEXINGTON, KY

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 STONE, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$15.6K

Largest payer

Regeneron Healthcare Solutions, Inc.

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.

Brand vs generic prescribing mix · Above average

THOMAS STONE, M.D. — brand share 46.0%
Specialty average (est.)

46% brand-name claims vs 54% generic, on 474 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.

474
Total Claims
$23K
Total Drug Cost
264
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
660
Total Day Supply
14,798
Brand vs Generic
46% brand / 54% generic
Brand Drug Cost
$17K
Generic Drug Cost
$6K

Patient Demographics

Average Patient Age
71.4 years
Avg HCC Risk Score
1.35
Gender Split
55% female / 45% male
Age Distribution
<65: 29, 65-74: 147, 75-84: 75, 85+: 13

Top Prescribed Drugs (Medicare Part D)

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

What THOMAS STONE, 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
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
223
Latanoprost
54
Prednisolone Acetate
32
Timolol Maleate
23
Brimonidine Tartrate
20
Erythromycin
Erythromycin Base
15
Difluprednate
14
Ketorolac Tromethamine
12
Lumigan
Bimatoprost
11

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

Ophthalmology Physician Overview

How THOMAS STONE, M.D. fits within the Ophthalmology Physician landscape nationally.

22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider

THOMAS STONE, M.D.'s 474 claims are below the specialty average of 1,420.

Nearby Ophthalmology Physician Providers in Kentucky

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

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

Frequently Asked Questions

What is THOMAS STONE, M.D.'s specialty?
THOMAS STONE, M.D. specializes in Ophthalmology Physician and practices in LOUISVILLE, Kentucky. Credentials: M.D..
How much does THOMAS STONE, M.D. prescribe under Medicare Part D?
In 2023, THOMAS STONE, M.D. wrote 474 Medicare Part D claims totaling $23K in drug costs for 264 beneficiaries.
What is THOMAS STONE, M.D.'s Medicare quality score?
THOMAS STONE, M.D. has a CMS MIPS Final Score of 100/100 (Quality: 100). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is THOMAS STONE, M.D. located?
THOMAS STONE, M.D. is located at 6450 DUTCHMANS PKWY, LOUISVILLE, KY, 40205. Phone: (859) 263-3900.
What is THOMAS STONE, M.D.'s NPI number?
THOMAS STONE, M.D.'s National Provider Identifier (NPI) is 1528064219, issued on 06/27/2005.
Does THOMAS STONE, M.D. prescribe more brand-name or generic drugs?
THOMAS STONE, M.D.'s prescribing is 46% brand-name and 54% generic drugs by claim count, with $17K in brand drug costs.
How many Ophthalmology Physician providers are there in the US?
There are 22,090 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does THOMAS STONE, M.D. prescribe most often?
Based on 2023 Medicare Part D data, THOMAS STONE, M.D.'s most frequently prescribed drugs include Neomycin-Polymyxin-Dexameth, Latanoprost, Prednisolone Acetate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS STONE, M.D. accept Medicare?
THOMAS STONE, M.D. appears in CMS Medicare data with 474 Part D claims and 264 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS STONE, M.D.'s credentials?
THOMAS STONE, M.D.'s NPI is 1528064219 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