Physician

John A Johnkoski

According to 2025 Medicare claims, John Johnkoski (NPI: 1992737035) practices thoracic surgery in the Wausau, WI market, with the plurality of this provider's patient population coming from Marathon, WI. This provider's primary affiliated billing organization is ASPIRUS MEDICAL GROUP, INC. (NPI: 1235421918; TIN: 391670223) and primary practice location at 54401-4120.

Johnkoski's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 185 traditional Medicare patients, billed 414 HCPCS/CPT codes, and received $109,718 in Medicare payments. The top billing code was 33533 (Coronary artery bypass using artery graft, 1 graft). Part D data shows 499 prescription claims across 93 beneficiaries totaling $29,046 in drug costs, led by Jardiance (Empagliflozin). 2021 DME data shows 24 claims. Open Payments data shows 16 records totaling $6,570. 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 declined steadily, from $186,504 to $109,718. In contrast, Part D prescription costs have moved from a lower plateau to a higher plateau, from $12,644 to $29,046. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	203	525	$186,504
2016	199	510	$188,554
2017	206	470	$160,142
2018	213	492	$181,061
2019	214	493	$185,633
2020	193	437	$143,902
2021	147	341	$111,256
2022	197	398	$139,119
2023	158	365	$107,924
2024	185	414	$109,718

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	89	331	$12,644
2016	96	278	$17,232
2017	85	335	$15,499
2018	88	303	$9,736
2019	91	378	$11,034
2020	72	331	$17,750
2021	70	251	$10,391
2022	75	276	$23,930
2023	73	344	$22,206
2024	93	499	$29,046

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	N/R	22	$1,823
2016	N/R	N/R	N/R
2017	N/R	N/R	N/R
2018	N/R	N/R	N/R
2019	N/R	N/R	N/R
2020	N/R	N/R	N/R
2021	N/R	24	$1,477
2022	N/R	N/R	N/R
2023	N/R	N/R	N/R
2024	N/R	N/R	N/R

* / # = 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
33533	Coronary artery bypass using artery graft, 1 graft	28	28	$591
33361	Replacement of aortic valve through the skin and femoral artery	64	64	$517
99205	New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	47	47	$149
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	24	24	$67
93793	Anticoagulant management of patient taking warfarin	19	97	$8

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Jardiance	Empagliflozin	32	614	$13,024
Eliquis	Apixaban	11	372	$6,975
Clopidogrel	Clopidogrel Bisulfate	51	2,149	$883
Amiodarone Hcl	Amiodarone Hcl	59	833	$804
Atorvastatin Calcium	Atorvastatin Calcium	22	792	$588

Top 5 DME services in 2024

No connected or detailed DME service-level records for 2024.

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	11	$630	ATRICURE, INC.
Research Payments	Reported research-related payment or transfer-of-value amount.	5	$5,940	ATRICURE, INC.
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 John A. Johnkoski?

Tedicare shows public-source Medicare data for John A. Johnkoski (NPI 1992737035), 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 John A. Johnkoski have ACO affiliation data?

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

What billing organization is linked to John A. Johnkoski?

John A. Johnkoski is linked to ASPIRUS MEDICAL GROUP, INC. (billing NPI 1235421918) in the available physician profile data.

Does John A. Johnkoski have Open Payments data?

John A. Johnkoski has 16 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.