NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1093908915 M.D.
Verify on CMS → Stella Casillas, M.D.
Ophthalmology Physician in Arecibo, Puerto Rico.
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
1K
Medicare Part D claims · 391 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
59%
generic claims · 41% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$26.83
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
Stella Casillas, M.D. filed 1,379 Medicare Part D claims in 2023 as a Ophthalmology Physician in Arecibo, Puerto Rico, prescribing 59% generic.
- 1K
- Part D claims, 2023
- 59%
- generic prescribing
- $26.83
- 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.
Stella Casillas, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,379 Top 21% higher than 79% 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-eligible specialty (heuristic, not verified)
Stella Casillas, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Stella Casillas, M.D.?
Quality data not reportedPrimary specialty
Ophthalmology Physician
Medicare Part D claims
1,379 3% vs specialty avg
Specialty distribution in Puerto Rico
How Ophthalmology Physician compares to other specialties among Puerto Rico 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).
Stella Casillas, M.D. appears in the CMS NPPES registry as a Ophthalmology Physician provider holding M.D. credentials at METRO PAVIA CLINICS, Arecibo, PR, 00612, with a listed phone of (787) 820-8989. NPI 1093908915 was issued on 08/23/2007.
Medicare Part D records for calendar year 2023 show 1,379 prescription claims written by this provider, covering 391 Medicare beneficiaries and totaling roughly $78K in drug spend, split 41% brand-name and 59% 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 | 1093908915 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 08/23/2007 |
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 Stella Casillas, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$27
Largest payer
Genentech USA, 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
Stella Casillas, M.D. - brand share 41.0%
Ophthalmology Physician average
41% brand-name claims vs 59% generic, on 1,379 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.
1,379
Total Claims
$78K
Total Drug Cost
391
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,609
- Total Day Supply
- 40,319
- Brand vs Generic
- 41% brand / 59% generic
- Brand Drug Cost
- $61K
- Generic Drug Cost
- $17K
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 2.27
- Gender Split
- 54% female / 46% male
- Age Distribution
- <65: 37, 65-74: 169, 75-84: 146, 85+: 39
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Stella Casillas, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisolone Acetate
Prednisolone Acetate
205 claims
- Timolol Maleate
Timolol Maleate
146 claims
- Brimonidine Tartrate
Brimonidine Tartrate
138 claims
- Dorzolamide-Timolol
Dorzolamide-Timolol
132 claims
- Latanoprost
Latanoprost
130 claims
- Ofloxacin
Ofloxacin
120 claims
- Fluorometholone
Fluorometholone
111 claims
- Ketorolac Trometha… 71
Ketorolac Tromethamine
71 claims
| Drug | Claims |
|---|---|
| Prednisolone Acetate | 205 |
| Timolol Maleate | 146 |
| Brimonidine Tartrate | 138 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 132 |
| Latanoprost | 130 |
| Ofloxacin | 120 |
| Fluorometholone | 111 |
| Ketorolac Tromethamine | 71 |
| Alphagan P Brimonidine Tartrate | 67 |
| Lumigan Bimatoprost | 50 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Stella Casillas, M.D. 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
Stella Casillas, M.D.'s 1,379 claims are below the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Casillas.
Dr. Alejandro Acosta Rivera
M.D.
San German, PR
Dr. Alejandro Acosta-Ortiz
MD
Cabo Rojo, PR
Dr. Luma Al-Attar
MD
Manati, PR
Dr. Luis Alcaraz
M.D.
Aguadilla, PR
Dr. Vicente Alcaraz
MD
San Juan, PR
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 Puerto Rico 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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Medical Specialties Explained
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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Frequently Asked Questions
What is Stella Casillas, M.D.'s specialty? ▼
Stella Casillas, M.D. specializes in Ophthalmology Physician and practices in Arecibo, Puerto Rico. Credentials: M.D..
How much does Stella Casillas, M.D. prescribe under Medicare Part D? ▼
In 2023, Stella Casillas, M.D. wrote 1,379 Medicare Part D claims totaling $78K in drug costs for 391 beneficiaries.
Where is Stella Casillas, M.D. located? ▼
Stella Casillas, M.D. is located at METRO PAVIA CLINICS, Arecibo, PR, 00612. Phone: (787) 820-8989.
What is Stella Casillas, M.D.'s NPI number? ▼
Stella Casillas, M.D.'s National Provider Identifier (NPI) is 1093908915, issued on 08/23/2007.
Does Stella Casillas, M.D. prescribe more brand-name or generic drugs? ▼
Stella Casillas, M.D.'s prescribing is 41% brand-name and 59% generic drugs by claim count, with $61K 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 Stella Casillas, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Stella Casillas, M.D.'s most frequently prescribed drugs include Prednisolone Acetate, Timolol Maleate, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stella Casillas, M.D. accept Medicare? ▼
Stella Casillas, M.D. appears in CMS Medicare data with 1,379 Part D claims and 391 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stella Casillas, M.D.'s credentials? ▼
Stella Casillas, M.D.'s NPI is 1093908915 with credentials M.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.