2026 NPPES data Optometrist NPI 1396052163 O.D.
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TARRA WINCHELL, O.D.

Optometrist in NEWARK, Delaware. 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
103
Medicare Part D claims · 28 beneficiaries · Optometrist avg: 257
Generic prescribing
49%
generic claims · 51% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$147.78
2 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: TARRA WINCHELL, O.D. is a Optometrist ([object Object]) practicing in NEWARK, Delaware with a Medicare Part D prescribing footprint of 103 claims across 28 beneficiaries — 51% brand-name prescribing . Industry payments of $147.78 across 2 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: TARRA WINCHELL, O.D. filed 103 Medicare Part D claims in 2023 across NEWARK, Delaware. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

TARRA WINCHELL, O.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 09/01/2010

NPI 1396052163

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

103 60% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Delaware

How Optometrist compares to other specialties among Delaware providers

Delaware providers

Optometrist share within Delaware

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

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).

TARRA WINCHELL, O.D. is a Optometrist provider practicing in NEWARK, Delaware, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: O.D.. NPI: 1396052163. 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.

TARRA WINCHELL, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 19 HAINES ST, NEWARK, DE, 19711, with a listed phone of (302) 239-1933. NPI 1396052163 was issued on 09/01/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WINCHELL 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 103 prescription claims written by this provider, covering 28 Medicare beneficiaries and totaling roughly $6K in drug spend, split 51% brand-name and 49% 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

19 HAINES ST
NEWARK, DE 19711

Provider Details

NPI 1396052163
Specialty Optometrist
Credentials O.D.
Gender Female
NPI Issued 09/01/2010

Hospital and facility affiliations

Facilities where TARRA WINCHELL, 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.

SIMON EYE ASSOCIATES PA
WILMINGTON, DE

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 TARRA WINCHELL, O.D.. Source: openpaymentsdata.cms.gov.

Total received

$148

Largest payer

Alcon Vision 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.

Brand vs generic prescribing mix · Brand-heavy

TARRA WINCHELL, O.D. — brand share 51.0%
Specialty average (est.)

51% brand-name claims vs 49% generic, on 103 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.

103
Total Claims
$6K
Total Drug Cost
28
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
144
Total Day Supply
3,855
Brand vs Generic
51% brand / 49% generic
Brand Drug Cost
$4K
Generic Drug Cost
$2K

Patient Demographics

Average Patient Age
73.6 years
Avg HCC Risk Score
0.96
Gender Split
57% female / 43% male
Age Distribution
<65: 0, 65-74: 17, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Latanoprost
55

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

Optometrist Overview

How TARRA WINCHELL, O.D. fits within the Optometrist landscape nationally.

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

TARRA WINCHELL, O.D.'s 103 claims are below the specialty average of 257.

Nearby Optometrist Providers in Delaware

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

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

Frequently Asked Questions

What is TARRA WINCHELL, O.D.'s specialty?
TARRA WINCHELL, O.D. specializes in Optometrist and practices in NEWARK, Delaware. Credentials: O.D..
How much does TARRA WINCHELL, O.D. prescribe under Medicare Part D?
In 2023, TARRA WINCHELL, O.D. wrote 103 Medicare Part D claims totaling $6K in drug costs for 28 beneficiaries.
Where is TARRA WINCHELL, O.D. located?
TARRA WINCHELL, O.D. is located at 19 HAINES ST, NEWARK, DE, 19711. Phone: (302) 239-1933.
What is TARRA WINCHELL, O.D.'s NPI number?
TARRA WINCHELL, O.D.'s National Provider Identifier (NPI) is 1396052163, issued on 09/01/2010.
Does TARRA WINCHELL, O.D. prescribe more brand-name or generic drugs?
TARRA WINCHELL, O.D.'s prescribing is 51% brand-name and 49% generic drugs by claim count, with $4K 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 TARRA WINCHELL, O.D. prescribe most often?
Based on 2023 Medicare Part D data, TARRA WINCHELL, O.D.'s most frequently prescribed drugs include Latanoprost. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does TARRA WINCHELL, O.D. accept Medicare?
TARRA WINCHELL, O.D. appears in CMS Medicare data with 103 Part D claims and 28 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify TARRA WINCHELL, O.D.'s credentials?
TARRA WINCHELL, O.D.'s NPI is 1396052163 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