2026 NPPES data Optometrist NPI 1265500110 OD INC.
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GREGORY COOK, OD INC.

Optometrist in WOODWARD, Oklahoma. 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
144
Medicare Part D claims · 54 beneficiaries · Optometrist avg: 257
Generic prescribing
69%
generic claims · 31% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: GREGORY COOK, OD INC. is a Optometrist ([object Object]) practicing in WOODWARD, Oklahoma with a Medicare Part D prescribing footprint of 144 claims across 54 beneficiaries — 31% brand-name prescribing .

What stands out: GREGORY COOK, OD INC. filed 144 Medicare Part D claims in 2023 across WOODWARD, Oklahoma. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

GREGORY COOK, OD INC. at a glance

Quality data not reported

NPI registry status

Active

Issued 11/30/2006

NPI 1265500110

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

144 44% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Oklahoma

How Optometrist compares to other specialties among Oklahoma providers

Oklahoma providers

Optometrist share within Oklahoma

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

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).

GREGORY COOK, OD INC. is a Optometrist provider practicing in WOODWARD, Oklahoma, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: OD INC.. NPI: 1265500110. 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.

GREGORY COOK, OD INC. appears in the CMS NPPES registry as a Optometrist provider holding OD INC. credentials at 1621 TEXAS ST, WOODWARD, OK, 73801, with a listed phone of (580) 256-1288. NPI 1265500110 was issued on 11/30/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what COOK 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 144 prescription claims written by this provider, covering 54 Medicare beneficiaries and totaling roughly $11K in drug spend, split 31% brand-name and 69% 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

1621 TEXAS ST
WOODWARD, OK 73801

Provider Details

NPI 1265500110
Specialty Optometrist
Credentials OD INC.
Gender Male
NPI Issued 11/30/2006

Brand vs generic prescribing mix · Above average

GREGORY COOK, OD INC. — brand share 31.0%
Specialty average (est.)

31% brand-name claims vs 69% generic, on 144 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.

144
Total Claims
$11K
Total Drug Cost
54
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
184
Total Day Supply
4,296
Brand vs Generic
31% brand / 69% generic
Brand Drug Cost
$9K
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
74.6 years
Avg HCC Risk Score
1.15
Gender Split
37% female / 63% 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
Tobramycin
32
Latanoprost
20
Timolol Maleate
17
Brimonidine Tartrate
13
Rocklatan
Netarsudil Mesylat/Latanoprost
11

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

Optometrist Overview

How GREGORY COOK, OD INC. fits within the Optometrist landscape nationally.

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

GREGORY COOK, OD INC.'s 144 claims are below the specialty average of 257.

Nearby Optometrist Providers in Oklahoma

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

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

Frequently Asked Questions

What is GREGORY COOK, OD INC.'s specialty?
GREGORY COOK, OD INC. specializes in Optometrist and practices in WOODWARD, Oklahoma. Credentials: OD INC..
How much does GREGORY COOK, OD INC. prescribe under Medicare Part D?
In 2023, GREGORY COOK, OD INC. wrote 144 Medicare Part D claims totaling $11K in drug costs for 54 beneficiaries.
Where is GREGORY COOK, OD INC. located?
GREGORY COOK, OD INC. is located at 1621 TEXAS ST, WOODWARD, OK, 73801. Phone: (580) 256-1288.
What is GREGORY COOK, OD INC.'s NPI number?
GREGORY COOK, OD INC.'s National Provider Identifier (NPI) is 1265500110, issued on 11/30/2006.
Does GREGORY COOK, OD INC. prescribe more brand-name or generic drugs?
GREGORY COOK, OD INC.'s prescribing is 31% brand-name and 69% generic drugs by claim count, with $9K 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 GREGORY COOK, OD INC. prescribe most often?
Based on 2023 Medicare Part D data, GREGORY COOK, OD INC.'s most frequently prescribed drugs include Tobramycin, Latanoprost, Timolol Maleate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GREGORY COOK, OD INC. accept Medicare?
GREGORY COOK, OD INC. appears in CMS Medicare data with 144 Part D claims and 54 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GREGORY COOK, OD INC.'s credentials?
GREGORY COOK, OD INC.'s NPI is 1265500110 with credentials OD INC.. 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