Physician

Vicente Lam Siu, M.D.

According to 2025 Medicare claims, Vicente Siu, M.D. (NPI: 1497958862) practices internal medicine in the San Angelo, TX market, with the plurality of this provider's patient population coming from Tom Green, TX. This provider's primary affiliated billing organization is SHANNON CLINIC (NPI: 1770587149; TIN: 752600873) and primary practice location at 76903-5919.

Siu's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 560 traditional Medicare patients, billed 4,466 HCPCS/CPT codes, and received $261,745 in Medicare payments. The top billing code was G0439 (Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit). Part D data shows 12,407 prescription claims across 655 beneficiaries totaling $1,039,605 in drug costs, led by Ozempic (Semaglutide). DME data shows 499 claims. Open Payments data shows 5 records totaling $86. 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 $4,212 to $261,745. Similarly, Part D prescription costs have risen steadily, from $57,920 to $1,039,605. In contrast, DME billing represents a smaller volume and moved sharply higher in recent years, from $815 to $38,402.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	19	69	$4,212
2016	18	102	$6,016
2017	27	100	$6,514
2018	18	43	$2,660
2019	423	3,703	$171,181
2020	456	5,069	$179,352
2021	634	3,947	$200,502
2022	510	3,986	$237,100
2023	540	4,016	$230,084
2024	560	4,466	$261,745

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	232	1,172	$57,920
2016	194	1,421	$80,616
2017	325	3,633	$282,465
2018	428	5,730	$468,375
2019	555	4,807	$362,230
2020	567	10,100	$794,360
2021	601	10,943	$939,597
2022	629	12,007	$1,065,570
2023	628	12,103	$1,106,307
2024	655	12,407	$1,039,605

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	N/R	N/R	N/R
2016	N/R	N/R	N/R
2017	N/R	11	$500
2018	N/R	N/R	N/R
2019	N/R	39	$1,115
2020	31	262	$9,597
2021	56	477	$22,738
2022	74	550	$30,751
2023	50	616	$35,616
2024	65	499	$45,796

* / # = 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
G0439	Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	208	208	$134
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	306	618	$81
83036	Hemoglobin a1c level	158	242	$9
93000	Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report	138	139	$9
36415	Insertion of needle into vein for collection of blood sample	283	480	$8

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Ozempic	Semaglutide	150	6,470	$200,668
Eliquis	Apixaban	132	6,435	$122,225
Jardiance	Empagliflozin	45	2,760	$52,066
Januvia	Sitagliptin Phosphate	46	2,454	$42,931
Mounjaro	Tirzepatide	25	1,120	$41,488

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	N/R	31	$13,962
A4352	Intermittent urinary catheter; coude (curved) tip, with or without coating (teflon, silicone, silicone elastomeric, or hydrophilic, etc.), each	N	N/R	12	$11,311
E1390	Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate	Y	N/R	82	$5,394
B4035	Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape	N	N/R	11	$2,358
A7031	Face mask interface, replacement for full face mask, each	N	N/R	24	$1,992

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	5	$86	PFIZER INC.
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 Vicente Lam Siu, M.D.?

Tedicare shows public-source Medicare data for Vicente Lam Siu, M.D. (NPI 1497958862), 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 Vicente Lam Siu, M.D. have ACO affiliation data?

No ACO affiliation record is shown in the available Tedicare data for this profile.

What billing organization is linked to Vicente Lam Siu, M.D.?

Vicente Lam Siu, M.D. is linked to SHANNON CLINIC (billing NPI 1770587149) in the available physician profile data.

Does Vicente Lam Siu, M.D. have Open Payments data?

Vicente Lam Siu, M.D. has 5 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.