Alex Tan Villacastin, M.D.
Internal Medicine Physician · Citrus Springs, FL
Alex Tan Villacastin, M.D. is an internal medicine physician with a practice address in Citrus Springs, Florida, and NPI 1194827097, issued on Sep 1, 2006. Check the license (Florida ME071085, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Alex Tan Villacastin
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- ME071085 FL
Self-reported in NPPES; status is on the state search - Practice location
- 10489 N Florida Ave, Citrus Springs, FL 34434
- Phone
- (352) 489-2486
- Enumerated
- Sep 1, 2006
- Record last updated
- Dec 29, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (352) 489-5786
- Medicaid ID
- 25180660 FL
- Medicare enrollment
- Enrolled (PECOS I20100422000217); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 10,151 in Florida → Look up another NPI →
Also registered at 10489 N Florida Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alec Breckenridge, PA-CPhysician Assistant1285385088
- Angela McGonigal, ARNP, FNP-CFamily Nurse Practitioner1861909236
- Mina Serena Reburiano, APRNFamily Nurse Practitioner1285472795
- Jared Vanderpohl, PA-CPhysician Assistant1619546561
- Alexander Villacastin, ARNPAdult Health Nurse Practitioner1174720619
- Sheila Villacastin, ARNPAdult Health Nurse Practitioner1164629614
Verify Alex Tan Villacastin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME071085Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14.1 times the Medicare Part D claims of the average internal medicine physician in 2024
44,890 Medicare Part D claims for 3,381 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 1,049 claims were for opioids.
Most prescribed
- Atorvastatin Calcium2,403 claims
- Levothyroxine Sodium1,835 claims
- Rosuvastatin Calcium1,418 claims
- Losartan Potassium1,324 claims
- Lisinopril1,222 claims
- Amlodipine Besylate1,145 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $2,806.50
125 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Nature Coast Geriatric Services LLCBeverly Hills, FL
- West Florida Medical Associates, PACitrus Springs, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alex Tan Villacastin among 10,151 internal medicine physician records in Florida
Alex Tan Villacastin, M.D. is one of 10,151 internal medicine physician records with a practice address in Florida. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 55% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1991 · median 2004 among the 6,606 with a school on file
- Record last updated2014 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 internal medicine physician record lists a practice address in Citrus Springs
They are 1 of the 44 NPPES records with a practice address in Citrus Springs, and 10,151 internal medicine physician records in Florida.
All 10,151 in Florida → Every provider in Citrus Springs → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rajendra Bellam, M.DDunnellon, FL 344321053392969
- Sirisha Chalasani, MDDunnellon, FL 344321508849068
- Ginie Chan, MDDunnellon, FL 344321861448961
- Ulhas Deven, M.D.Dunnellon, FL 344321235120338
- Ivette Hernandez, MDFloral City, FL 344361629066295
- Sukumaran Ramaswami, MDDunnellon, FL 344321447269469
- Neal Lumapas, M.D.Dunnellon, FL 344311013075894
- Angela Acevedo, MDCrystal River, FL 344291104895135
Common questions
What is Alex Tan Villacastin, M.D.'s NPI number?
Alex Tan Villacastin, M.D.'s National Provider Identifier (NPI) is 1194827097, issued on Sep 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alex Tan Villacastin, M.D. located?
The NPPES record lists a practice address at 10489 N Florida Ave, Citrus Springs, FL, 34434. Phone: (352) 489-2486. Providers update this record themselves, so call before visiting.
How can I verify Alex Tan Villacastin, M.D.'s license?
NPPES lists Florida license number ME071085, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alex Tan Villacastin, M.D. prescribe under Medicare Part D?
In 2024, Alex Tan Villacastin, M.D. had 44,890 Medicare Part D claims for 3,381 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.