NPI registry status
Active
2026 NPPES data Optometrist NPI 1043396302 DO
Verify on CMS → Frank Castaldi, DO
Optometrist in Stamford, Connecticut.
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
945
Medicare Part D claims · 217 beneficiaries · Optometrist avg: 257
Generic prescribing
30%
generic claims · 70% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 17 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
Frank Castaldi, DO reported a CMS MIPS final score of 100/100 - above the 83.1 national average - and filed 945 Medicare Part D claims in 2023.
- 100/100
- MIPS score · +17 vs avg
- 945
- Part D claims, 2023
- 30%
- 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.
Frank Castaldi, DO's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
100 Top 7% higher than 93% 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 Frank Castaldi, DO sits
This provider among optometrist peers
Across the 6,527 optometrist providers who report both Medicare Part D prescribing and a MIPS quality score, Frank Castaldi, DO writes more Part D claims than 84% of them and scores higher on MIPS quality than 91% - 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 optometrist peer from a representative sample of 60; the gold marker is Frank Castaldi, DO. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Frank Castaldi, DO?
High performer (top quartile)Primary specialty
Optometrist
Medicare Part D claims
945 268% vs specialty avg
MIPS final score
100/100 16.9 pts vs avg
Specialty distribution in Connecticut
How Optometrist compares to other specialties among Connecticut providers
Medicare quality performance, MIPS
Frank Castaldi, DO's 2023 MIPS final score plotted against the Optometrist national average
- MIPS Final Score
- 100/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Optometrist) - 100/100 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).
Frank Castaldi, DO appears in the CMS NPPES registry as an Optometrist provider holding DO credentials at 0NE BANK STREET, Stamford, CT, 06901, with a listed phone of (203) 324-1606. NPI 1043396302 was issued on 10/30/2006.
Medicare Part D records for calendar year 2023 show 945 prescription claims written by this provider, covering 217 Medicare beneficiaries and totaling roughly $423K in drug spend, split 70% brand-name and 30% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 100/100 for the 2023 performance year (Quality 90), compared with the national average of 83.1.
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 | 1043396302 |
|---|---|
| Specialty | Optometrist |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 10/30/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
100
Final Score
Avg: 83.1
90
Quality
Reporting: Individual
Brand vs generic prescribing mix · Brand-heavy
Frank Castaldi, DO - brand share 70.0%
Optometrist average
70% brand-name claims vs 30% generic, on 945 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.
945
Total Claims
$423K
Total Drug Cost
217
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,628
- Total Day Supply
- 47,097
- Brand vs Generic
- 70% brand / 30% generic
- Brand Drug Cost
- $402K
- Generic Drug Cost
- $22K
Patient Demographics
- Average Patient Age
- 72.7 years
- Avg HCC Risk Score
- 1.33
- Gender Split
- 66% female / 34% male
- Age Distribution
- <65: 29, 65-74: 103, 75-84: 59, 85+: 26
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Frank Castaldi, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Lumigan
Lumigan
249 claims
- Latanoprost
Latanoprost
144 claims
- Restasis
Restasis
114 claims
- Combigan 63
Combigan
63 claims
- Travoprost 43
Travoprost
43 claims
- Simbrinza 40
Simbrinza
40 claims
- Timolol Maleate 33
Timolol Maleate
33 claims
- Vyzulta 33
Vyzulta
33 claims
| Drug | Claims |
|---|---|
| Lumigan Bimatoprost | 249 |
| Latanoprost | 144 |
| Restasis Cyclosporine | 114 |
| Combigan Brimonidine Tartrate/Timolol | 63 |
| Travoprost | 43 |
| Simbrinza Brinzolamide/Brimonidine Tart | 40 |
| Timolol Maleate | 33 |
| Vyzulta Latanoprostene Bunod | 33 |
| Brimonidine Tartrate-Timolol Brimonidine Tartrate/Timolol | 31 |
| Rhopressa Netarsudil Mesylate | 29 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How Frank Castaldi, DO fits within the Optometrist landscape nationally.
60,484
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider
Frank Castaldi, DO's 945 claims are above the specialty average of 257.
Nearby Optometrist Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Castaldi.
Dr. Annemarie Abramson
O.D.
Waterbury, CT
Dr. Aylin Adem
OD
Naugatuck, CT
Dr. George Adrian
O.D.
Groton, CT
Dr. Douglas Agranov
O.D.
Madison, CT
Shraiy Agrawal
Guilford, CT
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 Connecticut 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
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 Connecticut
Frequently Asked Questions
What is Frank Castaldi, DO's specialty? ▼
Frank Castaldi, DO specializes in Optometrist and practices in Stamford, Connecticut. Credentials: DO.
How much does Frank Castaldi, DO prescribe under Medicare Part D? ▼
In 2023, Frank Castaldi, DO wrote 945 Medicare Part D claims totaling $423K in drug costs for 217 beneficiaries.
What is Frank Castaldi, DO's Medicare quality score? ▼
Frank Castaldi, DO has a CMS MIPS Final Score of 100/100 (Quality: 90). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Frank Castaldi, DO located? ▼
Frank Castaldi, DO is located at 0NE BANK STREET, Stamford, CT, 06901. Phone: (203) 324-1606.
What is Frank Castaldi, DO's NPI number? ▼
Frank Castaldi, DO's National Provider Identifier (NPI) is 1043396302, issued on 10/30/2006.
Does Frank Castaldi, DO prescribe more brand-name or generic drugs? ▼
Frank Castaldi, DO's prescribing is 70% brand-name and 30% generic drugs by claim count, with $402K 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 Frank Castaldi, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Frank Castaldi, DO's most frequently prescribed drugs include Lumigan, Latanoprost, Restasis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Frank Castaldi, DO accept Medicare? ▼
Frank Castaldi, DO appears in CMS Medicare data with 945 Part D claims and 217 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Frank Castaldi, DO's credentials? ▼
Frank Castaldi, DO's NPI is 1043396302 with credentials DO. 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.