2026 NPPES data Optometrist NPI 1134234438 O.D.
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MARK LEIPERT, O.D.

Optometrist in BERLIN, Vermont. 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
146
Medicare Part D claims · 29 beneficiaries · Optometrist avg: 257
Generic prescribing
62%
generic claims · 38% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

MARK LEIPERT, O.D. filed 146 Medicare Part D claims in 2023 as a Optometrist in BERLIN, Vermont, prescribing 62% generic.

146
Part D claims, 2023
62%
generic prescribing

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.

MARK LEIPERT, O.D.'s Medicare Part D volume vs every U.S. prescriber

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

146 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 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 MARK LEIPERT, O.D.?

Quality data not reported

NPI registry status

Active

Issued 08/20/2006

NPI 1134234438

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

146 43% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Vermont

How Optometrist compares to other specialties among Vermont providers

Vermont providers

Optometrist share within Vermont

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

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 LEIPERT, O.D. is a Optometrist provider practicing in BERLIN, Vermont, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: O.D.. NPI: 1134234438. 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 LEIPERT, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 282 BERLIN MALL RD, BERLIN, VT, 05602, with a listed phone of (802) 223-2090. NPI 1134234438 was issued on 08/20/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LEIPERT 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 146 prescription claims written by this provider, covering 29 Medicare beneficiaries and totaling roughly $27K in drug spend, split 38% brand-name and 62% 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

282 BERLIN MALL RD
BERLIN, VT 05602

Provider Details

NPI 1134234438
Specialty Optometrist
Credentials O.D.
Gender Male
NPI Issued 08/20/2006

Hospital and facility affiliations

Facilities where MARK LEIPERT, 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.

OPTICAL EXPRESSIONS BERLIN, LLC
BARRE, VT

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

MARK LEIPERT, O.D. — brand share 38.0%
Specialty average (est.)

38% brand-name claims vs 62% generic, on 146 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.

146
Total Claims
$27K
Total Drug Cost
29
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
204
Total Day Supply
5,549
Brand vs Generic
38% brand / 62% generic
Brand Drug Cost
$24K
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
74.7 years
Avg HCC Risk Score
1.00
Gender Split
38% female / 62% male

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
65
Timolol Maleate
20
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
15
Restasis
Cyclosporine
13

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

Optometrist Overview

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

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

MARK LEIPERT, O.D.'s 146 claims are below the specialty average of 257.

Nearby Optometrist Providers in Vermont

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

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

Frequently Asked Questions

What is MARK LEIPERT, O.D.'s specialty?
MARK LEIPERT, O.D. specializes in Optometrist and practices in BERLIN, Vermont. Credentials: O.D..
How much does MARK LEIPERT, O.D. prescribe under Medicare Part D?
In 2023, MARK LEIPERT, O.D. wrote 146 Medicare Part D claims totaling $27K in drug costs for 29 beneficiaries.
Where is MARK LEIPERT, O.D. located?
MARK LEIPERT, O.D. is located at 282 BERLIN MALL RD, BERLIN, VT, 05602. Phone: (802) 223-2090.
What is MARK LEIPERT, O.D.'s NPI number?
MARK LEIPERT, O.D.'s National Provider Identifier (NPI) is 1134234438, issued on 08/20/2006.
Does MARK LEIPERT, O.D. prescribe more brand-name or generic drugs?
MARK LEIPERT, O.D.'s prescribing is 38% brand-name and 62% generic drugs by claim count, with $24K 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 MARK LEIPERT, O.D. prescribe most often?
Based on 2023 Medicare Part D data, MARK LEIPERT, O.D.'s most frequently prescribed drugs include Latanoprost, Timolol Maleate, Dorzolamide-Timolol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARK LEIPERT, O.D. accept Medicare?
MARK LEIPERT, O.D. appears in CMS Medicare data with 146 Part D claims and 29 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARK LEIPERT, O.D.'s credentials?
MARK LEIPERT, O.D.'s NPI is 1134234438 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