Physician

Alex Tan Villacastin, M.D.

According to 2025 Medicare claims, Alex Villacastin, M.D. (NPI: 1194827097) practices internal medicine in the Homosassa Springs, FL market, with the plurality of this provider's patient population coming from Citrus, FL. This provider's primary affiliated billing organization is NATURE COAST GERIATRIC SERVICES LLC (NPI: 1417340654) and primary practice location at 34461-8334. Villacastin is affiliated with the 'N HEALTH NETWORK PARTNERS, LLC (ACO ID: D0347), participating under the REACH model.

Villacastin's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 1,361 traditional Medicare patients, billed 5,997 HCPCS/CPT codes, and received $299,023 in Medicare payments. The top billing code was 99306 (Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more). Part D data shows 44,890 prescription claims across 3,381 beneficiaries totaling $4,203,557 in drug costs, led by Eliquis (Apixaban). DME data shows 832 claims. Open Payments data shows 125 records totaling $2,807. You can download detailed data with all billing codes (2015-2024). For more recent data, please contact us.

Over the past 10 years, this provider's Medicare Part B carrier billing has moved from a lower plateau to a higher plateau, from $271,524 to $299,023. Concurrently, Part D prescription costs have changed little. In contrast, DME billing represents a smaller volume and moved up and down with repeated peaks and valleys, starting at $82,492 and ending at $69,220.

Part B Carrier Billing Trend

Medicare payment trend, with N of patients and claim lines in the table.

Year	Patients	Clm Lines	Payment
2015	1,573	5,330	$271,524
2016	1,347	4,545	$150,762
2017	1,306	4,841	$156,250
2018	1,520	6,355	$250,354
2019	1,549	6,108	$246,755
2020	1,482	5,148	$212,962
2021	1,702	6,042	$295,789
2022	1,524	5,639	$277,569
2023	1,429	5,602	$300,143
2024	1,361	5,997	$299,023

Part D Events Trend

Drug cost trend, with N of patients and prescription claims in the table.

Year	Patients	Claims	Drug Cost
2015	2,191	36,968	$2,652,584
2016	2,375	41,281	$2,885,560
2017	2,498	42,936	$3,067,801
2018	2,675	42,455	$3,168,645
2019	3,014	45,846	$3,677,483
2020	2,981	46,982	$3,972,774
2021	3,093	43,735	$3,881,676
2022	2,862	40,630	$3,767,121
2023	3,032	40,746	$3,940,335
2024	3,381	44,890	$4,203,557

DME Billing Trend

Medicare payment trend, with N of patients and DME claim records in the table.

Year	Patients	Claims	Payment
2015	667	1,858	$86,512
2016	524	1,657	$72,860
2017	299	1,564	$77,731
2018	417	1,628	$51,275
2019	429	1,790	$65,976
2020	358	1,269	$48,900
2021	412	1,417	$59,012
2022	361	1,202	$60,817
2023	283	1,301	$87,659
2024	154	832	$51,884

* / # = suppressed by CMS; 0 = reported zero; N/R = not reported or blank.

Top 5 Part B carrier billing codes in 2024

By total payments.

Code	Description	Patients	Clm Lines	Total Payment
99306	Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more	172	207	$136
99309	Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	269	1,268	$78
87428	Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza	197	239	$68
36415	Insertion of needle into vein for collection of blood sample	416	670	$9
81002	Urinalysis, manual test	220	317	$3

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Eliquis	Apixaban	693	20,967	$411,467
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	360	18,838	$393,788
Ozempic	Semaglutide	179	8,548	$274,821
Farxiga	Dapagliflozin Propanediol	251	12,502	$234,730
Xarelto	Rivaroxaban	256	11,033	$206,955

Top 5 DME services in 2024

By Total Medicare Payment Amount.

HCPCS Code	HCPCS Description	Supplier Rental Indicator	Total Supplier Beneficiaries	Total Supplier Claims	Total Medicare Payment Amount
A4239	Supply allowance for non-adjunctive, non-implanted continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service	N	11	45	$23,635
E1390	Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate	Y	18	134	$9,309
A6196	Alginate or other fiber gelling dressing, wound cover, sterile, pad size 16 sq. in. or less, each dressing	N	N/R	12	$3,967
K0001	Standard wheelchair	Y	21	128	$2,175
E0431	Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing	Y	13	97	$1,589

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	125	$2,807	AstraZeneca Pharmaceuticals LP
Research Payments	Reported research-related payment or transfer-of-value amount.	0	$0	N/R
Ownership / Investment Interests	Reported value of ownership or investment interests.	0	$0	N/R

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FAQ

What Medicare data is available for Alex Tan Villacastin, M.D.?

Tedicare shows public-source Medicare data for Alex Tan Villacastin, M.D. (NPI 1194827097), including provider identity, specialty, market context, Medicare Part B activity, Part D prescribing, DME records, Open Payments where available, billing organization details, and ACO affiliation signals where available. Profile data covers 2015-2024, with current attribution based on 2025 claims where available.

Does Alex Tan Villacastin, M.D. have ACO affiliation data?

Alex Tan Villacastin, M.D. is shown with ACO affiliation data for 'N HEALTH NETWORK PARTNERS, LLC (REACH, ACO ID D0347).

What billing organization is linked to Alex Tan Villacastin, M.D.?

Alex Tan Villacastin, M.D. is linked to NATURE COAST GERIATRIC SERVICES LLC (billing NPI 1417340654) in the available physician profile data.

Does Alex Tan Villacastin, M.D. have Open Payments data?

Alex Tan Villacastin, M.D. has 125 connected Open Payments records in the available 2024 summary data.

Can I download physician-level Medicare data from Tedicare?

Yes. Tedicare provides sample physician export data and paid custom physician data exports for research, planning, outreach, and market analysis. Exports can include physician profile fields, market and specialty context, billing organization details, ACO affiliation signals where available, and Medicare utilization data.