Physician

Aileen Westrick

According to 2025 Medicare claims, Aileen Westrick (NPI: 1770710493) practices endocrinology in the Chicago-Naperville-Schaumburg, IL market, with the plurality of this provider's patient population coming from Du Page, IL. This provider's primary affiliated billing organization is CENTRAL DUPAGE PHYSICIAN GROUP (NPI: 1033149844; TIN: 363149833) and primary practice location at 60108-2213. Westrick is affiliated with the Northwestern Medicine Health Network ACO LLC (ACO ID: A5444), participating under the MSSP model.

Westrick's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 475 traditional Medicare patients, billed 7,445 HCPCS/CPT codes, and received $200,920 in Medicare payments. The top billing code was 99214 (Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more). Part D data shows 5,182 prescription claims across 781 beneficiaries totaling $2,198,927 in drug costs, led by Ozempic (Semaglutide). DME data shows 691 claims. Open Payments data shows 2 records totaling $154. 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 $32,144 to $200,920. Similarly, Part D prescription costs have moved sharply higher in recent years, from $113,912 to $2,198,927. For DME billing, reported payments moved sharply higher in recent years, from $25 to $178,378.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	153	401	$32,144
2016	199	930	$43,953
2017	299	1,580	$59,275
2018	289	2,566	$67,280
2019	352	4,474	$108,997
2020	417	5,328	$129,504
2021	462	6,327	$168,409
2022	460	6,729	$166,655
2023	451	7,314	$185,292
2024	475	7,445	$200,920

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	99	482	$113,912
2016	192	1,027	$370,373
2017	281	1,484	$486,503
2018	326	1,816	$722,453
2019	397	2,608	$1,115,751
2020	509	3,211	$1,429,427
2021	590	3,869	$2,012,895
2022	691	4,552	$2,398,021
2023	705	4,818	$2,790,744
2024	781	5,182	$2,198,927

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	11	38	$702
2016	64	144	$2,998
2017	61	121	$1,639
2018	81	185	$6,420
2019	134	331	$22,549
2020	155	466	$28,081
2021	213	696	$82,675
2022	229	931	$140,004
2023	216	989	$157,917
2024	210	691	$181,781

* / # = 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
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	343	568	$97
95251	Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report	76	161	$28
J0897	Injection, denosumab, 1 mg	55	5,520	$20
G2211	Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	364	515	$13
83036	Hemoglobin a1c level	193	350	$9

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Ozempic	Semaglutide	247	11,554	$369,774
Jardiance	Empagliflozin	165	10,168	$199,782
Mounjaro	Tirzepatide	154	5,376	$193,465
Tresiba Flextouch U-100	Insulin Degludec	150	11,837	$146,837
Trulicity	Dulaglutide	104	4,228	$140,394

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	81	368	$160,327
A4224	Supplies for maintenance of insulin infusion catheter, per week	N	N/R	25	$5,875
J1817	Insulin for administration through dme (i.e., insulin pump) per 50 units	N	N/R	31	$5,695
E2103	Non-adjunctive, non-implanted continuous glucose monitor or receiver	N	18	18	$4,071
A4253	Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips	N	76	163	$3,740

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	2	$154	Dexcom, 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 Aileen Westrick?

Tedicare shows public-source Medicare data for Aileen Westrick (NPI 1770710493), 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 Aileen Westrick have ACO affiliation data?

Aileen Westrick is shown with ACO affiliation data for Northwestern Medicine Health Network ACO LLC (MSSP, ACO ID A5444).

What billing organization is linked to Aileen Westrick?

Aileen Westrick is linked to CENTRAL DUPAGE PHYSICIAN GROUP (billing NPI 1033149844) in the available physician profile data.

Does Aileen Westrick have Open Payments data?

Aileen Westrick has 2 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.