2026 NPPES data Optometrist NPI 1689868291 O.D.
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LAUREN GUZIK, O.D.

Optometrist in GLASTONBURY, 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
32
Medicare Part D claims · 15 beneficiaries · Optometrist avg: 257
Generic prescribing
53%
generic claims · 47% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: LAUREN GUZIK, O.D. is a Optometrist ([object Object]) practicing in GLASTONBURY, Connecticut with a Medicare Part D prescribing footprint of 32 claims across 15 beneficiaries — 47% brand-name prescribing .

What stands out: LAUREN GUZIK, O.D. filed 32 Medicare Part D claims in 2023 across GLASTONBURY, Connecticut. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

LAUREN GUZIK, O.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 08/28/2007

NPI 1689868291

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

32 88% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Connecticut

How Optometrist compares to other specialties among Connecticut providers

Connecticut providers

Optometrist share within Connecticut

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

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).

LAUREN GUZIK, O.D. is a Optometrist provider practicing in GLASTONBURY, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: O.D.. NPI: 1689868291. 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.

LAUREN GUZIK, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 33 WELLES ST, GLASTONBURY, CT, 06033, with a listed phone of (860) 633-1401. NPI 1689868291 was issued on 08/28/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GUZIK 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 32 prescription claims written by this provider, covering 15 Medicare beneficiaries and totaling roughly $12K in drug spend, split 47% brand-name and 53% 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

33 WELLES ST
GLASTONBURY, CT 06033

Provider Details

NPI 1689868291
Specialty Optometrist
Credentials O.D.
Gender Female
NPI Issued 08/28/2007

Hospital and facility affiliations

Facilities where LAUREN GUZIK, 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.

KELLY FAMILY EYECARE LLC
VERNON, 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).

Brand vs generic prescribing mix · Above average

LAUREN GUZIK, O.D. — brand share 47.0%
Specialty average (est.)

47% brand-name claims vs 53% generic, on 32 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.

32
Total Claims
$12K
Total Drug Cost
15
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
50
Total Day Supply
1,233
Brand vs Generic
47% brand / 53% generic
Brand Drug Cost
$10K
Generic Drug Cost
$2K

Patient Demographics

Average Patient Age
72.7 years
Avg HCC Risk Score
1.36

Optometrist Overview

How LAUREN GUZIK, O.D. fits within the Optometrist landscape nationally.

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

LAUREN GUZIK, O.D.'s 32 claims are below the specialty average of 257.

Nearby Optometrist Providers in Connecticut

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

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

Frequently Asked Questions

What is LAUREN GUZIK, O.D.'s specialty?
LAUREN GUZIK, O.D. specializes in Optometrist and practices in GLASTONBURY, Connecticut. Credentials: O.D..
How much does LAUREN GUZIK, O.D. prescribe under Medicare Part D?
In 2023, LAUREN GUZIK, O.D. wrote 32 Medicare Part D claims totaling $12K in drug costs for 15 beneficiaries.
Where is LAUREN GUZIK, O.D. located?
LAUREN GUZIK, O.D. is located at 33 WELLES ST, GLASTONBURY, CT, 06033. Phone: (860) 633-1401.
What is LAUREN GUZIK, O.D.'s NPI number?
LAUREN GUZIK, O.D.'s National Provider Identifier (NPI) is 1689868291, issued on 08/28/2007.
Does LAUREN GUZIK, O.D. prescribe more brand-name or generic drugs?
LAUREN GUZIK, O.D.'s prescribing is 47% brand-name and 53% generic drugs by claim count, with $10K 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.
Does LAUREN GUZIK, O.D. accept Medicare?
LAUREN GUZIK, O.D. appears in CMS Medicare data with 32 Part D claims and 15 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LAUREN GUZIK, O.D.'s credentials?
LAUREN GUZIK, O.D.'s NPI is 1689868291 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