2026 NPPES data Optometrist NPI 1629209150 O.D.
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MARK DI LORETO, O.D.

Optometrist in KENSINGTON, 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
33
Medicare Part D claims · 13 beneficiaries · Optometrist avg: 257
Generic prescribing
3%
generic claims · 97% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: MARK DI LORETO, O.D. is a Optometrist ([object Object]) practicing in KENSINGTON, Connecticut with a Medicare Part D prescribing footprint of 33 claims across 13 beneficiaries — 97% brand-name prescribing .

What stands out: MARK DI LORETO, O.D. filed 33 Medicare Part D claims in 2023 across KENSINGTON, Connecticut. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

MARK DI LORETO, O.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 07/31/2009

NPI 1629209150

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

33 87% 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).

MARK DI LORETO, O.D. is a Optometrist provider practicing in KENSINGTON, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: O.D.. NPI: 1629209150. 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.

MARK DI LORETO, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 359 MAIN ST, KENSINGTON, CT, 06037, with a listed phone of (860) 829-1020. NPI 1629209150 was issued on 07/31/2009. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DI LORETO 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 33 prescription claims written by this provider, covering 13 Medicare beneficiaries and totaling roughly $39K in drug spend, split 97% brand-name and 3% 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

359 MAIN ST
KENSINGTON, CT 06037

Provider Details

NPI 1629209150
Specialty Optometrist
Credentials O.D.
Gender Male
NPI Issued 07/31/2009

Brand vs generic prescribing mix · Brand-heavy

MARK DI LORETO, O.D. — brand share 97.0%
Specialty average (est.)

97% brand-name claims vs 3% generic, on 33 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.

33
Total Claims
$39K
Total Drug Cost
13
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
62
Total Day Supply
1,806
Brand vs Generic
97% brand / 3% generic
Brand Drug Cost
$39K

Patient Demographics

Average Patient Age
69.5 years
Avg HCC Risk Score
0.93

Optometrist Overview

How MARK DI LORETO, O.D. fits within the Optometrist landscape nationally.

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

MARK DI LORETO, O.D.'s 33 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 DI LORETO.

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

Frequently Asked Questions

What is MARK DI LORETO, O.D.'s specialty?
MARK DI LORETO, O.D. specializes in Optometrist and practices in KENSINGTON, Connecticut. Credentials: O.D..
How much does MARK DI LORETO, O.D. prescribe under Medicare Part D?
In 2023, MARK DI LORETO, O.D. wrote 33 Medicare Part D claims totaling $39K in drug costs for 13 beneficiaries.
Where is MARK DI LORETO, O.D. located?
MARK DI LORETO, O.D. is located at 359 MAIN ST, KENSINGTON, CT, 06037. Phone: (860) 829-1020.
What is MARK DI LORETO, O.D.'s NPI number?
MARK DI LORETO, O.D.'s National Provider Identifier (NPI) is 1629209150, issued on 07/31/2009.
Does MARK DI LORETO, O.D. prescribe more brand-name or generic drugs?
MARK DI LORETO, O.D.'s prescribing is 97% brand-name and 3% generic drugs by claim count, with $39K 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 MARK DI LORETO, O.D. accept Medicare?
MARK DI LORETO, O.D. appears in CMS Medicare data with 33 Part D claims and 13 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARK DI LORETO, O.D.'s credentials?
MARK DI LORETO, O.D.'s NPI is 1629209150 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