NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1194827097 M.D.
Verify on CMS → Alex Villacastin, M.D.
Internal Medicine Physician in Citrus Springs, Florida.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal Medicine 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
41K
Medicare Part D claims · 3K beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
86%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.8K
125 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Alex Villacastin, M.D. filed 40,746 Medicare Part D claims in 2023 as an Internal Medicine Physician in Citrus Springs, Florida, prescribing 86% generic.
- 41K
- Part D claims, 2023
- 86%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥98th
- pct by Part D claim volume (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1194827097 · Internal Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-HEAVY · BOOK-MID · PHOTO-ENUM
- NPI-10 1194827097
- ENUM-LEGACY 2006
- TAX-MEGA 173K Internal Medicine
- RX-HEAVY 41K claims
- BOOK-MID 11,125 in Florida
- PHOTO-ENUM Wei Shen · 2006
Alex Villacastin, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
40,746 ≥ 98th percentile 98% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Alex Villacastin, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Alex Villacastin, M.D.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
40,746 15× vs specialty avg
Specialty distribution in Florida
How Internal Medicine Physician compares to other specialties among Florida 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 Internal Medicine 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).
Practice Address
Provider Details
| NPI | 1194827097 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 09/01/2006 |
Hospital and facility affiliations
Facilities where Alex Villacastin, M.D. 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.
Nature Coast Geriatric Services LLC
Beverly Hills, FL
West Florida Medical Associates, PA
Citrus Springs, FL
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 Alex Villacastin, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$2.8K
Largest payer
AstraZeneca Pharmaceuticals LP
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 - Florida FLDOH 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 ~75K Florida medical licensees in 2023 - they are NOT specific to Alex Villacastin, M.D.. To verify Alex Villacastin, M.D.'s current license status, search the FLDOH public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
480
Total board actions, Florida 2023
Across 467 cases
6.40
Actions per 1,000 licensees
Florida statewide rate
monetary fine
Most common action type
138 cases
FLDOH 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 Florida disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Alex Villacastin, M.D. - brand share 13.0%
Internal Medicine Physician average
13% brand-name claims vs 86% generic, on 40,746 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.
40,746
Total Claims
$3.9M
Total Drug Cost
3,032
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 74,639
- Total Day Supply
- 2,088,122
- Brand vs Generic
- 13% brand / 86% generic
- Brand Drug Cost
- $3.1M
- Generic Drug Cost
- $821K
- Opioid Claims
- 976 (2.4% rate)
- Antibiotic Claims
- 995
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 1.83
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 401, 65-74: 1,283, 75-84: 1,008, 85+: 340
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Alex Villacastin, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
2,041 claims
- Levothyroxine Sodium
Levothyroxine Sodium
1,543 claims
- Losartan Potassium
Losartan Potassium
1,209 claims
- Lisinopril
Lisinopril
1,118 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
995 claims
- Amlodipine Besylate
Amlodipine Besylate
977 claims
- Furosemide
Furosemide
969 claims
- Gabapentin
Gabapentin
966 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 2,041 |
| Levothyroxine Sodium | 1,543 |
| Losartan Potassium | 1,209 |
| Lisinopril | 1,118 |
| Rosuvastatin Calcium | 995 |
| Amlodipine Besylate | 977 |
| Furosemide | 969 |
| Gabapentin | 966 |
| Metformin Hcl | 762 |
| Tamsulosin Hcl | 752 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Alex Villacastin, M.D. fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Alex Villacastin, M.D.'s 40,746 claims are above the specialty average of 2,716.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Villacastin, both outside Florida so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in Florida
Other clinicians with the same primary specialty enrolled in Florida, drawn from the same CMS NPPES roster as Villacastin.
One of 11,125 Internal Medicine Physician providers enrolled in Florida, 5 are shown here.
Dr. Hayden Aaron
M.D.
West Palm Beach, FL
Dr. Abiedu Abaaba
M.D.
Jacksonville, FL
Dr. Kashif Abad
M.D.
West Palm Beach, FL
Dr. Jose Abando
MD
Daytona Beach, FL
Dr. Ismeth Abbas
M.D.
Jacksonville, FL
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Alex Villacastin, M.D.'s specialty? ▼
Alex Villacastin, M.D. specializes in Internal Medicine Physician and practices in Citrus Springs, Florida. Credentials: M.D..
How much does Alex Villacastin, M.D. prescribe under Medicare Part D? ▼
In 2023, Alex Villacastin, M.D. wrote 40,746 Medicare Part D claims totaling $3.9M in drug costs for 3,032 beneficiaries.
Where is Alex Villacastin, M.D. located? ▼
Alex Villacastin, M.D. is located at 10489 N FLORIDA AVE, Citrus Springs, FL, 34434. Phone: (352) 489-2486.
What is Alex Villacastin, M.D.'s NPI number? ▼
Alex Villacastin, M.D.'s National Provider Identifier (NPI) is 1194827097, issued on 09/01/2006.
Does Alex Villacastin, M.D. prescribe more brand-name or generic drugs? ▼
Alex Villacastin, M.D.'s prescribing is 13% brand-name and 86% generic drugs by claim count, with $3.1M in brand drug costs.
Does Alex Villacastin, M.D. prescribe opioids? ▼
Yes, Alex Villacastin, M.D. had 976 opioid claims in 2023 with an opioid prescribing rate of 2.4%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Alex Villacastin, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Alex Villacastin, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alex Villacastin, M.D. accept Medicare? ▼
Alex Villacastin, M.D. appears in CMS Medicare data with 40,746 Part D claims and 3,032 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alex Villacastin, M.D.'s credentials? ▼
Alex Villacastin, M.D.'s NPI is 1194827097 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
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.