NPI registry status
Active
2026 NPPES data General Practice Physician NPI 1235596347 M.D.
Verify on CMS → Gyssel Cabanillas Castillo, M.D.
General Practice Physician in Mayaguez, 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 16,677 in General Practice 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
177
Medicare Part D claims · 108 beneficiaries · General Practice Physician avg: 3K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Gyssel Cabanillas Castillo, M.D. filed 177 Medicare Part D claims in 2023 as a General Practice Physician in Mayaguez, Puerto Rico.
- 177
- Part D claims, 2023
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.
Gyssel Cabanillas Castillo, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
177 35th percentile higher than 35% 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)
Gyssel Cabanillas Castillo, 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 Gyssel Cabanillas Castillo, M.D.?
Quality data not reportedPrimary specialty
General Practice Physician
Medicare Part D claims
177 94% vs specialty avg
Specialty distribution in Puerto Rico
How General Practice 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 General Practice 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).
Gyssel Cabanillas Castillo, M.D. appears in the CMS NPPES registry as a General Practice Physician provider holding M.D. credentials at 110 CALLE ENRIQUE VAZQUEZ BAEZ, Mayaguez, PR, 00680, with a listed phone of (787) 447-4240. NPI 1235596347 was issued on 01/20/2016.
Medicare Part D records for calendar year 2023 show 177 prescription claims written by this provider, covering 108 Medicare beneficiaries and totaling roughly $11K in drug spend.
General Practice Physician is a mid-sized specialty nationwide, with 16,677 enrolled providers across 56 states and an average of 2,872 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 | 1235596347 |
|---|---|
| Specialty | General Practice Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 01/20/2016 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
177
Total Claims
$11K
Total Drug Cost
108
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 199
- Total Day Supply
- 2,838
- Generic Drug Cost
- $2K
- Antibiotic Claims
- 45
Patient Demographics
- Average Patient Age
- 70.6 years
- Avg HCC Risk Score
- 1.89
- Gender Split
- 67% female / 33% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gyssel Cabanillas Castillo, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ketorolac Trometha…
Ketorolac Tromethamine
19 claims
- Prednisone
Prednisone
14 claims
- Eliquis
Eliquis
12 claims
| Drug | Claims |
|---|---|
| Ketorolac Tromethamine | 19 |
| Prednisone | 14 |
| Eliquis Apixaban | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
General Practice Physician Overview
How Gyssel Cabanillas Castillo, M.D. fits within the General Practice Physician landscape nationally.
16,677
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider
Gyssel Cabanillas Castillo, M.D.'s 177 claims are below the specialty average of 2,872.
Nearby General Practice Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Cabanillas Castillo.
Dr. Veronica Abraham
MD
San Juan, PR
Dr. Manuel Abraham Gonzalez
M.D.
San Juan, PR
Dr. Jennifer Abraham Vega
MD
San Juan, PR
Dr. Jose M. Abreu Guzman
M.D.
Manati, PR
Dr. Steven Abreu Reyes
M.D.
Las Piedras, PR
Compare General Practice 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 General Practice 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
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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 Puerto Rico
Frequently Asked Questions
What is Gyssel Cabanillas Castillo, M.D.'s specialty? ▼
Gyssel Cabanillas Castillo, M.D. specializes in General Practice Physician and practices in Mayaguez, Puerto Rico. Credentials: M.D..
How much does Gyssel Cabanillas Castillo, M.D. prescribe under Medicare Part D? ▼
In 2023, Gyssel Cabanillas Castillo, M.D. wrote 177 Medicare Part D claims totaling $11K in drug costs for 108 beneficiaries.
Where is Gyssel Cabanillas Castillo, M.D. located? ▼
Gyssel Cabanillas Castillo, M.D. is located at 110 CALLE ENRIQUE VAZQUEZ BAEZ, Mayaguez, PR, 00680. Phone: (787) 447-4240.
What is Gyssel Cabanillas Castillo, M.D.'s NPI number? ▼
Gyssel Cabanillas Castillo, M.D.'s National Provider Identifier (NPI) is 1235596347, issued on 01/20/2016.
How many General Practice Physician providers are there in the US? ▼
There are 16,677 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does Gyssel Cabanillas Castillo, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Gyssel Cabanillas Castillo, M.D.'s most frequently prescribed drugs include Ketorolac Tromethamine, Prednisone, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gyssel Cabanillas Castillo, M.D. accept Medicare? ▼
Gyssel Cabanillas Castillo, M.D. appears in CMS Medicare data with 177 Part D claims and 108 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gyssel Cabanillas Castillo, M.D.'s credentials? ▼
Gyssel Cabanillas Castillo, M.D.'s NPI is 1235596347 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.