NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1770544462 MD
Verify on CMS → Emmet Cassidy, MD
Ophthalmology Physician in Homewood, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 22,090 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
797
Medicare Part D claims · 246 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
58%
generic claims · 42% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$30.92
1 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
Emmet Cassidy, MD filed 797 Medicare Part D claims in 2023 as a Ophthalmology Physician in Homewood, Illinois, prescribing 58% generic.
- 797
- Part D claims, 2023
- 58%
- 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.
Emmet Cassidy, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
797 Top 29% higher than 71% 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
✓
Board certification likely (heuristic, not verified)
Emmet Cassidy, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Emmet Cassidy, MD?
Quality data not reportedPrimary specialty
Ophthalmology Physician
Medicare Part D claims
797 44% vs specialty avg
Specialty distribution in Illinois
How Ophthalmology Physician compares to other specialties among Illinois 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 Ophthalmology Physician. 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).
Emmet Cassidy, MD appears in the CMS NPPES registry as a Ophthalmology Physician provider holding MD credentials at 18646 DIXIE HWY, Homewood, IL, 60430, with a listed phone of (708) 647-6635. NPI 1770544462 was issued on 03/31/2006.
Medicare Part D records for calendar year 2023 show 797 prescription claims written by this provider, covering 246 Medicare beneficiaries and totaling roughly $69K in drug spend, split 42% brand-name and 58% generic by claim count.
Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 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 | 1770544462 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 03/31/2006 |
Hospital and facility affiliations
Facilities where Emmet Cassidy, MD 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.
Advanced Eye Care SC
New Lenox, IL
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 Emmet Cassidy, MD. Source: openpaymentsdata.cms.gov.
Total received
$31
Largest payer
ABBVIE 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.
License & disciplinary context - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to Emmet Cassidy, MD. To verify Emmet Cassidy, MD's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Emmet Cassidy, MD - brand share 42.0%
Ophthalmology Physician average
42% brand-name claims vs 58% generic, on 797 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.
797
Total Claims
$69K
Total Drug Cost
246
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,454
- Total Day Supply
- 40,167
- Brand vs Generic
- 42% brand / 58% generic
- Brand Drug Cost
- $58K
- Generic Drug Cost
- $11K
Patient Demographics
- Average Patient Age
- 76.7 years
- Avg HCC Risk Score
- 1.31
- Gender Split
- 64% female / 36% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Emmet Cassidy, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
366 claims
- Neomycin-Polymyxin… 96
Neomycin-Polymyxin-Dexameth
96 claims
- Brimonidine Tartrate 61
Brimonidine Tartrate
61 claims
- Timolol Maleate 48
Timolol Maleate
48 claims
- Restasis 34
Restasis
34 claims
- Prednisolone Acetate 33
Prednisolone Acetate
33 claims
- Dorzolamide-Timolol 30
Dorzolamide-Timolol
30 claims
- Dorzolamide Hcl 23
Dorzolamide Hcl
23 claims
| Drug | Claims |
|---|---|
| Latanoprost | 366 |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 96 |
| Brimonidine Tartrate | 61 |
| Timolol Maleate | 48 |
| Restasis Cyclosporine | 34 |
| Prednisolone Acetate | 33 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 30 |
| Dorzolamide Hcl | 23 |
| Lumigan Bimatoprost | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Emmet Cassidy, MD fits within the Ophthalmology Physician landscape nationally.
22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider
Emmet Cassidy, MD's 797 claims are below the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Cassidy.
Dr. Walid Abdallah
MD
Rockford, IL
Dr. Ashley Abraham
M.D.
Springfield, IL
Dr. Evelyn Ackermann
MD
Elgin, IL
Dr. Kathleen Ackman Blake
MD
Hinsdale, IL
Dr. Kaela Acuff
MD
Chicago, IL
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 Illinois 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.
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How insurance networks affect your costs
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Frequently Asked Questions
What is Emmet Cassidy, MD's specialty? ▼
Emmet Cassidy, MD specializes in Ophthalmology Physician and practices in Homewood, Illinois. Credentials: MD.
How much does Emmet Cassidy, MD prescribe under Medicare Part D? ▼
In 2023, Emmet Cassidy, MD wrote 797 Medicare Part D claims totaling $69K in drug costs for 246 beneficiaries.
Where is Emmet Cassidy, MD located? ▼
Emmet Cassidy, MD is located at 18646 DIXIE HWY, Homewood, IL, 60430. Phone: (708) 647-6635.
What is Emmet Cassidy, MD's NPI number? ▼
Emmet Cassidy, MD's National Provider Identifier (NPI) is 1770544462, issued on 03/31/2006.
Does Emmet Cassidy, MD prescribe more brand-name or generic drugs? ▼
Emmet Cassidy, MD's prescribing is 42% brand-name and 58% generic drugs by claim count, with $58K in brand drug costs.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,090 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 Emmet Cassidy, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Emmet Cassidy, MD's most frequently prescribed drugs include Latanoprost, Neomycin-Polymyxin-Dexameth, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Emmet Cassidy, MD accept Medicare? ▼
Emmet Cassidy, MD appears in CMS Medicare data with 797 Part D claims and 246 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Emmet Cassidy, MD's credentials? ▼
Emmet Cassidy, MD's NPI is 1770544462 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.
- 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.