NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1124180880 MD
Verify on CMS → Gary Cassel, MD
Ophthalmology Physician in Owings Mills, Maryland.
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
470
Medicare Part D claims · 127 beneficiaries · Ophthalmology Physician avg: 1K
MIPS score
0/100
▼ 83 pts below national avg 83.1 · Penalty band
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Gary Cassel, MD reported a CMS MIPS final score of 0/100 - below the 83.1 national average - and filed 470 Medicare Part D claims in 2023.
- 0/100
- MIPS score · -83 vs avg
- 470
- Part D claims, 2023
- 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.
Gary Cassel, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
0 0th percentile higher than 0% 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 Gary Cassel, 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, Gary Cassel, MD writes more Part D claims than 24% of them and scores higher on MIPS quality than 0% - placing this provider in the lower-volume, lower-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 Gary Cassel, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Gary Cassel, 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 Gary Cassel, MD?
Below national averagePrimary specialty
Ophthalmology Physician
Medicare Part D claims
470 67% vs specialty avg
MIPS final score
0/100 83.1 pts vs avg
Specialty distribution in Maryland
How Ophthalmology Physician compares to other specialties among Maryland providers
Medicare quality performance, MIPS
Gary Cassel, MD's 2023 MIPS final score plotted against the Ophthalmology Physician national average
- MIPS Final Score
- 0/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Ophthalmology Physician) - 0/100 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).
Gary Cassel, MD appears in the CMS NPPES registry as a Ophthalmology Physician provider holding MD credentials at 23 CROSSROADS DR STE 310, Owings Mills, MD, 21117, with a listed phone of (410) 581-1500. NPI 1124180880 was issued on 12/15/2006.
Medicare Part D records for calendar year 2023 show 470 prescription claims written by this provider, covering 127 Medicare beneficiaries and totaling roughly $62K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 0/100 for the 2023 performance year (Quality 0), compared with the national average of 83.1.
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 | 1124180880 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 12/15/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
0
Final Score
Avg: 83.1
0
Quality
Reporting: Individual
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
470
Total Claims
$62K
Total Drug Cost
127
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 947
- Total Day Supply
- 26,961
- Generic Drug Cost
- $10K
- Antibiotic Claims
- 16
Patient Demographics
- Average Patient Age
- 77.5 years
- Avg HCC Risk Score
- 0.84
- 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 Gary Cassel, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
184 claims
- Timolol Maleate 54
Timolol Maleate
54 claims
- Combigan 41
Combigan
41 claims
- Dorzolamide-Timolol 41
Dorzolamide-Timolol
41 claims
- Lumigan 35
Lumigan
35 claims
- Tobramycin-Dexamet… 18
Tobramycin-Dexamethasone
18 claims
- Erythromycin 12
Erythromycin
12 claims
- Brimonidine Tartrate 11
Brimonidine Tartrate
11 claims
| Drug | Claims |
|---|---|
| Latanoprost | 184 |
| Timolol Maleate | 54 |
| Combigan Brimonidine Tartrate/Timolol | 41 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 41 |
| Lumigan Bimatoprost | 35 |
| Tobramycin-Dexamethasone Tobramycin/Dexamethasone | 18 |
| Erythromycin Erythromycin Base | 12 |
| Brimonidine Tartrate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Gary Cassel, 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
Gary Cassel, MD's 470 claims are below the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Cassel.
Dr. Abdulrahman Abodarahim
MBBCH
Baltimore, MD
Dr. Donald Abrams
M.D.
Baltimore, MD
Dr. Lisa Abrams
M.D.
Lutherville, MD
Dr. Neal Adams
MD
Silver Spring, MD
Dr. Arturo Aglubat
M.D.
Bel Air, MD
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 Maryland 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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Frequently Asked Questions
What is Gary Cassel, MD's specialty? ▼
Gary Cassel, MD specializes in Ophthalmology Physician and practices in Owings Mills, Maryland. Credentials: MD.
How much does Gary Cassel, MD prescribe under Medicare Part D? ▼
In 2023, Gary Cassel, MD wrote 470 Medicare Part D claims totaling $62K in drug costs for 127 beneficiaries.
What is Gary Cassel, MD's Medicare quality score? ▼
Gary Cassel, MD has a CMS MIPS Final Score of 0/100 (Quality: 0). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Gary Cassel, MD located? ▼
Gary Cassel, MD is located at 23 CROSSROADS DR STE 310, Owings Mills, MD, 21117. Phone: (410) 581-1500.
What is Gary Cassel, MD's NPI number? ▼
Gary Cassel, MD's National Provider Identifier (NPI) is 1124180880, issued on 12/15/2006.
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 Gary Cassel, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Gary Cassel, MD's most frequently prescribed drugs include Latanoprost, Timolol Maleate, Combigan. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gary Cassel, MD accept Medicare? ▼
Gary Cassel, MD appears in CMS Medicare data with 470 Part D claims and 127 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gary Cassel, MD's credentials? ▼
Gary Cassel, MD's NPI is 1124180880 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.