NPI registry status
Active
2026 NPPES data Optometrist NPI 1760434351 O.D.
Verify on CMS → Clayton Westphal, O.D.
Optometrist in Glendale, Arizona.
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
519
Medicare Part D claims · 165 beneficiaries · Optometrist avg: 257
Generic prescribing
59%
generic claims · 41% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$539.15
25 payments · CMS Open Payments (Sunshine Act)
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
Clayton Westphal, O.D. filed 519 Medicare Part D claims in 2023 as an Optometrist in Glendale, Arizona, prescribing 59% generic.
- 519
- Part D claims, 2023
- 59%
- generic prescribing
- $539.15
- industry payments (Sunshine Act)
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.
Clayton Westphal, O.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
519 Top 34% higher than 66% 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 Clayton Westphal, O.D.?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
519 102% vs specialty avg
Specialty distribution in Arizona
How Optometrist compares to other specialties among Arizona 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).
Clayton Westphal, O.D. appears in the CMS NPPES registry as an Optometrist provider holding O.D. credentials at 6525 W SACK DR, Glendale, AZ, 85308, with a listed phone of (623) 561-1995. NPI 1760434351 was issued on 05/16/2006.
Medicare Part D records for calendar year 2023 show 519 prescription claims written by this provider, covering 165 Medicare beneficiaries and totaling roughly $55K in drug spend, split 41% brand-name and 59% 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 | 1760434351 |
|---|---|
| Specialty | Optometrist |
| Credentials | O.D. |
| Gender | Male |
| NPI Issued | 05/16/2006 |
Hospital and facility affiliations
Facilities where Clayton Westphal, 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.
Promedica Central Physicians
Toledo, OH
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Clayton Westphal, O.D.. Source: openpaymentsdata.cms.gov.
Total received
$539
Largest payer
SUN PHARMACEUTICAL INDUSTRIES INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Above average
Clayton Westphal, O.D. - brand share 41.0%
Optometrist average
41% brand-name claims vs 59% generic, on 519 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.
519
Total Claims
$55K
Total Drug Cost
165
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 852
- Total Day Supply
- 23,167
- Brand vs Generic
- 41% brand / 59% generic
- Brand Drug Cost
- $44K
- Generic Drug Cost
- $11K
Patient Demographics
- Average Patient Age
- 72.7 years
- Avg HCC Risk Score
- 1.34
- Gender Split
- 61% female / 39% male
- Age Distribution
- <65: 23, 65-74: 71, 75-84: 55, 85+: 16
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Clayton Westphal, O.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
227 claims
- Fluorometholone
Fluorometholone
92 claims
- Neomycin-Polymyxin… 19
Neomycin-Polymyxin-Dexameth
19 claims
- Timolol Maleate 19
Timolol Maleate
19 claims
- Simbrinza 17
Simbrinza
17 claims
- Bimatoprost 16
Bimatoprost
16 claims
- Dorzolamide Hcl 14
Dorzolamide Hcl
14 claims
- Dorzolamide-Timolol 14
Dorzolamide-Timolol
14 claims
| Drug | Claims |
|---|---|
| Latanoprost | 227 |
| Fluorometholone | 92 |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 19 |
| Timolol Maleate | 19 |
| Simbrinza Brinzolamide/Brimonidine Tart | 17 |
| Bimatoprost | 16 |
| Dorzolamide Hcl | 14 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 14 |
| 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 Clayton Westphal, O.D. fits within the Optometrist landscape nationally.
60,484
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider
Clayton Westphal, O.D.'s 519 claims are above the specialty average of 257.
Nearby Optometrist Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Westphal.
Dr. James Abbott
O.D.
Mesa, AZ
Dr. Andrew Abela
OD
Tempe, AZ
Dr. Sanar Abidali
OD
Glendale, AZ
Dr. Cristina Acevedo
OD
Sacaton, AZ
Dr. Joel Ackerman
O.D.
Phoenix, AZ
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 Arizona 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.
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Frequently Asked Questions
What is Clayton Westphal, O.D.'s specialty? ▼
Clayton Westphal, O.D. specializes in Optometrist and practices in Glendale, Arizona. Credentials: O.D..
How much does Clayton Westphal, O.D. prescribe under Medicare Part D? ▼
In 2023, Clayton Westphal, O.D. wrote 519 Medicare Part D claims totaling $55K in drug costs for 165 beneficiaries.
Where is Clayton Westphal, O.D. located? ▼
Clayton Westphal, O.D. is located at 6525 W SACK DR, Glendale, AZ, 85308. Phone: (623) 561-1995.
What is Clayton Westphal, O.D.'s NPI number? ▼
Clayton Westphal, O.D.'s National Provider Identifier (NPI) is 1760434351, issued on 05/16/2006.
Does Clayton Westphal, O.D. prescribe more brand-name or generic drugs? ▼
Clayton Westphal, O.D.'s prescribing is 41% brand-name and 59% generic drugs by claim count, with $44K 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 Clayton Westphal, O.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Clayton Westphal, O.D.'s most frequently prescribed drugs include Latanoprost, Fluorometholone, Neomycin-Polymyxin-Dexameth. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Clayton Westphal, O.D. accept Medicare? ▼
Clayton Westphal, O.D. appears in CMS Medicare data with 519 Part D claims and 165 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Clayton Westphal, O.D.'s credentials? ▼
Clayton Westphal, O.D.'s NPI is 1760434351 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
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.