2026 NPPES data Optometrist NPI 1841302320 O.D.
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ABBY THOMAS, O.D.

Optometrist in WINTERSET, Iowa. 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
260
Medicare Part D claims · 53 beneficiaries · Optometrist avg: 257
Generic prescribing
67%
generic claims · 33% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$402.75
9 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

ABBY THOMAS, O.D. filed 260 Medicare Part D claims in 2023 as a Optometrist in WINTERSET, Iowa, prescribing 67% generic.

260
Part D claims, 2023
67%
generic prescribing
$402.75
industry payments (Sunshine Act)

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.

ABBY THOMAS, O.D.'s Medicare Part D volume vs every U.S. prescriber

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

260 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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

What does the federal data show about ABBY THOMAS, O.D.?

Quality data not reported

NPI registry status

Active

Issued 08/31/2006

NPI 1841302320

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

260 1% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Iowa

How Optometrist compares to other specialties among Iowa providers

Iowa providers

Optometrist share within Iowa

1. Optometrist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Optometrist share within Iowa

Specialty board-certification context

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

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

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

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

ABBY THOMAS, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 102 N 1ST AVE, WINTERSET, IA, 50273, with a listed phone of (515) 462-1254. NPI 1841302320 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 THOMAS 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 260 prescription claims written by this provider, covering 53 Medicare beneficiaries and totaling roughly $27K in drug spend, split 33% brand-name and 67% 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.

Optometrist is a high-volume specialty nationwide, with 60,463 enrolled providers across 56 states and an average of 257 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

102 N 1ST AVE
WINTERSET, IA 50273

Provider Details

NPI 1841302320
Specialty Optometrist
Credentials O.D.
Gender Female
NPI Issued 08/31/2006

Hospital and facility affiliations

Facilities where ABBY THOMAS, O.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.

BEAVERDALE EYE PC
DES MOINES, IA

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 ABBY THOMAS, O.D.. Source: openpaymentsdata.cms.gov.

Total received

$403

Largest payer

Sight Sciences, 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

ABBY THOMAS, O.D. — brand share 33.0%
Specialty average (est.)

33% brand-name claims vs 67% generic, on 260 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.

260
Total Claims
$27K
Total Drug Cost
53
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
430
Total Day Supply
11,920
Brand vs Generic
33% brand / 67% generic
Brand Drug Cost
$17K
Generic Drug Cost
$10K

Patient Demographics

Average Patient Age
76.1 years
Avg HCC Risk Score
0.97
Gender Split
60% female / 40% male

Top Prescribed Drugs (Medicare Part D)

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

What ABBY THOMAS, O.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
Latanoprost
110
Timolol Maleate
33
Loteprednol Etabonate
15
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
14
Lumigan
Bimatoprost
14
Dorzolamide Hcl
13
Brimonidine Tartrate
12
Travoprost
12

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

Optometrist Overview

How ABBY THOMAS, O.D. fits within the Optometrist landscape nationally.

60,463
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider

ABBY THOMAS, O.D.'s 260 claims are above the specialty average of 257.

Nearby Optometrist Providers in Iowa

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

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

Frequently Asked Questions

What is ABBY THOMAS, O.D.'s specialty?
ABBY THOMAS, O.D. specializes in Optometrist and practices in WINTERSET, Iowa. Credentials: O.D..
How much does ABBY THOMAS, O.D. prescribe under Medicare Part D?
In 2023, ABBY THOMAS, O.D. wrote 260 Medicare Part D claims totaling $27K in drug costs for 53 beneficiaries.
Where is ABBY THOMAS, O.D. located?
ABBY THOMAS, O.D. is located at 102 N 1ST AVE, WINTERSET, IA, 50273. Phone: (515) 462-1254.
What is ABBY THOMAS, O.D.'s NPI number?
ABBY THOMAS, O.D.'s National Provider Identifier (NPI) is 1841302320, issued on 08/31/2006.
Does ABBY THOMAS, O.D. prescribe more brand-name or generic drugs?
ABBY THOMAS, O.D.'s prescribing is 33% brand-name and 67% generic drugs by claim count, with $17K in brand drug costs.
How many Optometrist providers are there in the US?
There are 60,463 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does ABBY THOMAS, O.D. prescribe most often?
Based on 2023 Medicare Part D data, ABBY THOMAS, O.D.'s most frequently prescribed drugs include Latanoprost, Timolol Maleate, Loteprednol Etabonate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ABBY THOMAS, O.D. accept Medicare?
ABBY THOMAS, O.D. appears in CMS Medicare data with 260 Part D claims and 53 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ABBY THOMAS, O.D.'s credentials?
ABBY THOMAS, O.D.'s NPI is 1841302320 with credentials O.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