NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1316051360 MD
Verify on CMS → William Dieck, MD
Ophthalmology Physician in Mount Kisco, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 22,082 in Ophthalmology Physician, 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
2K
Medicare Part D claims · 561 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
60%
generic claims · 40% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
91.6/100
▲ 8 pts above national avg 83.1 · Exceptional
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
William Dieck, MD reported a CMS MIPS final score of 91.6/100 - above the 83.1 national average - and filed 2,461 Medicare Part D claims in 2023.
- 91.6/100
- MIPS score · +8 vs avg
- 2K
- Part D claims, 2023
- 60%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
William Dieck, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
92 Top 37% higher than 63% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where William Dieck, MD sits
This provider among ophthalmology physician peers
Across the 9,866 ophthalmology physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Dieck, MD writes more Part D claims than 80% of them and scores higher on MIPS quality than 62% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one ophthalmology physician peer from a representative sample of 60; the gold marker is William Dieck, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Dieck, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about William Dieck, MD?
High performer (top quartile)Primary specialty
Ophthalmology Physician
Medicare Part D claims
2,461 73% vs specialty avg
MIPS final score
91.6/100 8.5 pts vs avg
Specialty distribution in New York
How Ophthalmology Physician compares to other specialties among New York providers
Medicare quality performance, MIPS
William Dieck, MD's 2023 MIPS final score plotted against the Ophthalmology Physician national average
- MIPS Final Score
- 91.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Ophthalmology Physician) - 91.6/100 vs national avg 83.1
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).
William Dieck, MD appears in the CMS NPPES registry as an Ophthalmology Physician provider holding MD credentials at 185 KISCO AVE STE 500, Mount Kisco, NY, 10549, with a listed phone of (914) 666-4939. NPI 1316051360 was issued on 08/18/2006.
Medicare Part D records for calendar year 2023 show 2,461 prescription claims written by this provider, covering 561 Medicare beneficiaries and totaling roughly $363K in drug spend, split 40% brand-name and 60% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.6/100 for the 2023 performance year (Quality 90.1), compared with the national average of 83.1.
Ophthalmology Physician is a mid-sized specialty nationwide, with 22,082 enrolled providers across 56 states and an average of 1,420 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 | 1316051360 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/18/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
91.5824
Final Score
Avg: 83.1
90.0969
Quality
Reporting: Group practice
License & disciplinary context - New York NYSBPMC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~100K New York medical licensees in 2023 - they are NOT specific to William Dieck, MD. To verify William Dieck, MD's current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
William Dieck, MD - brand share 40.0%
Ophthalmology Physician average
40% brand-name claims vs 60% generic, on 2,461 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.
2,461
Total Claims
$363K
Total Drug Cost
561
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,766
- Total Day Supply
- 100,018
- Brand vs Generic
- 40% brand / 60% generic
- Brand Drug Cost
- $309K
- Generic Drug Cost
- $54K
- Antibiotic Claims
- 125
Patient Demographics
- Average Patient Age
- 77.3 years
- Avg HCC Risk Score
- 1.04
- Gender Split
- 66% female / 34% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Dieck, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
681 claims
- Ketorolac Trometha… 230
Ketorolac Tromethamine
230 claims
- Prednisolone Acetate 220
Prednisolone Acetate
220 claims
- Timolol Maleate 167
Timolol Maleate
167 claims
- Neomycin-Polymyxin… 153
Neomycin-Polymyxin-Dexameth
153 claims
- Lumigan 112
Lumigan
112 claims
- Simbrinza 106
Simbrinza
106 claims
- Moxifloxacin 104
Moxifloxacin
104 claims
| Drug | Claims |
|---|---|
| Latanoprost | 681 |
| Ketorolac Tromethamine | 230 |
| Prednisolone Acetate | 220 |
| Timolol Maleate | 167 |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 153 |
| Lumigan Bimatoprost | 112 |
| Simbrinza Brinzolamide/Brimonidine Tart | 106 |
| Moxifloxacin Moxifloxacin Hcl | 104 |
| Restasis Cyclosporine | 88 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 80 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How William Dieck, MD fits within the Ophthalmology Physician landscape nationally.
22,082
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider
William Dieck, MD's 2,461 claims are above the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Dieck.
Dr. Aliaa Abdelhakim Hamed
M.D., PH.D.
New York, NY
Dr. Majida Abdul Gaffar
M.D.
Hawthorne, NY
Dr. David H Abramson
MD
New York, NY
Dr. Frank Accardi
MD
New York, NY
Dr. Jacob Ackerman
MD
Brooklyn, NY
Compare Ophthalmology Physician 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 New York medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Ophthalmology Physician 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
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore New York
Frequently Asked Questions
What is William Dieck, MD's specialty? ▼
William Dieck, MD specializes in Ophthalmology Physician and practices in Mount Kisco, New York. Credentials: MD.
How much does William Dieck, MD prescribe under Medicare Part D? ▼
In 2023, William Dieck, MD wrote 2,461 Medicare Part D claims totaling $363K in drug costs for 561 beneficiaries.
What is William Dieck, MD's Medicare quality score? ▼
William Dieck, MD has a CMS MIPS Final Score of 91.6/100 (Quality: 90.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Dieck, MD located? ▼
William Dieck, MD is located at 185 KISCO AVE STE 500, Mount Kisco, NY, 10549. Phone: (914) 666-4939.
What is William Dieck, MD's NPI number? ▼
William Dieck, MD's National Provider Identifier (NPI) is 1316051360, issued on 08/18/2006.
Does William Dieck, MD prescribe more brand-name or generic drugs? ▼
William Dieck, MD's prescribing is 40% brand-name and 60% generic drugs by claim count, with $309K in brand drug costs.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,082 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does William Dieck, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, William Dieck, MD's most frequently prescribed drugs include Latanoprost, Ketorolac Tromethamine, Prednisolone Acetate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Dieck, MD accept Medicare? ▼
William Dieck, MD appears in CMS Medicare data with 2,461 Part D claims and 561 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Dieck, MD's credentials? ▼
William Dieck, MD's NPI is 1316051360 with credentials MD. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.