NPI registry status
Active
2026 NPPES data Optometrist NPI 1265500110 OD INC.
Verify on CMS → Gregory Cook, OD INC.
Optometrist in Woodward, Oklahoma.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 60,484 in Optometrist, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
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
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Gregory Cook, OD INC. filed 144 Medicare Part D claims in 2023 as a Optometrist in Woodward, Oklahoma, prescribing 69% generic.
- 144
- Part D claims, 2023
- 69%
- 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.
Gregory Cook, OD INC.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
144 35th percentile higher than 35% of 1,370,886 prescribers
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 Gregory Cook, OD INC.?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
144 44% vs specialty avg
Specialty distribution in Oklahoma
How Optometrist compares to other specialties among Oklahoma providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Optometrist. Verify directly:
How MIPS and board certification work
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. appears in the CMS NPPES registry as an 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.
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.
Optometrist is a high-volume specialty nationwide, with 60,484 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
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%
Optometrist average
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.
What Gregory Cook, OD INC. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tobramycin
Tobramycin
32 claims
- Latanoprost
Latanoprost
20 claims
- Timolol Maleate
Timolol Maleate
17 claims
- Brimonidine Tartrate
Brimonidine Tartrate
13 claims
- Rocklatan 11
Rocklatan
11 claims
| 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.
60,484
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.
Dr. Candace Acord
O.D.L
Tecumseh, OK
Dr. Britton Adams
OD
Shawnee, OK
Dr. Daniel Adams
O.D.
Stillwater, OK
Dr. Kaylee Aguilar
OD
Fort Sill, OK
Dr. Faisal Ahmed
DOCTOR OF OPTOMETRY
Midwest City, OK
Compare Optometrist nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Oklahoma medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Optometrist peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
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Understanding Medicare Claims Data
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How insurance networks affect your costs
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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 60,484 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.