2026 NPPES data Optometrist NPI 1205820081 OD
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DARYLE CLARK, OD

Optometrist in GILLETTE, Wyoming. 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
168
Medicare Part D claims · 26 beneficiaries · Optometrist avg: 257
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: DARYLE CLARK, OD is a Optometrist ([object Object]) practicing in GILLETTE, Wyoming with a Medicare Part D prescribing footprint of 168 claims across 26 beneficiaries — 24% brand-name prescribing .

What stands out: DARYLE CLARK, OD filed 168 Medicare Part D claims in 2023 across GILLETTE, Wyoming. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

DARYLE CLARK, OD at a glance

Quality data not reported

NPI registry status

Active

Issued 09/07/2005

NPI 1205820081

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

168 35% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Wyoming

How Optometrist compares to other specialties among Wyoming providers

Wyoming providers

Optometrist share within Wyoming

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

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).

DARYLE CLARK, OD is a Optometrist provider practicing in GILLETTE, Wyoming, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: OD. NPI: 1205820081. 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.

DARYLE CLARK, OD appears in the CMS NPPES registry as a Optometrist provider holding OD credentials at 312 E LAKEWAY RD, GILLETTE, WY, 82718, with a listed phone of (307) 687-7353. NPI 1205820081 was issued on 09/07/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CLARK 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 168 prescription claims written by this provider, covering 26 Medicare beneficiaries and totaling roughly $9K in drug spend, split 24% brand-name and 76% 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

312 E LAKEWAY RD
GILLETTE, WY 82718

Provider Details

NPI 1205820081
Specialty Optometrist
Credentials OD
Gender Male
NPI Issued 09/07/2005

Hospital and facility affiliations

Facilities where DARYLE CLARK, OD 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.

EYE CARE ASSOCIATES OF WYOMING, P.C.
GILLETTE, WY

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 · Typical

DARYLE CLARK, OD — brand share 24.0%
Specialty average (est.)

24% brand-name claims vs 76% generic, on 168 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.

168
Total Claims
$9K
Total Drug Cost
26
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
241
Total Day Supply
6,584
Brand vs Generic
24% brand / 76% generic
Brand Drug Cost
$6K
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
77.0 years
Avg HCC Risk Score
0.86
Gender Split
50% female / 50% male
Age Distribution
<65: 0, 65-74: 12, 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
56
Timolol Maleate
48
Brimonidine Tartrate
12

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

Optometrist Overview

How DARYLE CLARK, OD fits within the Optometrist landscape nationally.

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

DARYLE CLARK, OD's 168 claims are below the specialty average of 257.

Nearby Optometrist Providers in Wyoming

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

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

Frequently Asked Questions

What is DARYLE CLARK, OD's specialty?
DARYLE CLARK, OD specializes in Optometrist and practices in GILLETTE, Wyoming. Credentials: OD.
How much does DARYLE CLARK, OD prescribe under Medicare Part D?
In 2023, DARYLE CLARK, OD wrote 168 Medicare Part D claims totaling $9K in drug costs for 26 beneficiaries.
Where is DARYLE CLARK, OD located?
DARYLE CLARK, OD is located at 312 E LAKEWAY RD, GILLETTE, WY, 82718. Phone: (307) 687-7353.
What is DARYLE CLARK, OD's NPI number?
DARYLE CLARK, OD's National Provider Identifier (NPI) is 1205820081, issued on 09/07/2005.
Does DARYLE CLARK, OD prescribe more brand-name or generic drugs?
DARYLE CLARK, OD's prescribing is 24% brand-name and 76% generic drugs by claim count, with $6K 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 DARYLE CLARK, OD prescribe most often?
Based on 2023 Medicare Part D data, DARYLE CLARK, OD's most frequently prescribed drugs include Latanoprost, Timolol Maleate, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does DARYLE CLARK, OD accept Medicare?
DARYLE CLARK, OD appears in CMS Medicare data with 168 Part D claims and 26 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify DARYLE CLARK, OD's credentials?
DARYLE CLARK, OD's NPI is 1205820081 with credentials OD. 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