Physician

Mary C Fields, MD

According to 2025 Medicare claims, Mary Fields, MD (NPI: 1861497745) practices psychiatry in the La Crosse-Onalaska, WI-MN market, with the plurality of this provider's patient population coming from Houston, MN. This provider's primary affiliated billing organization is PARK NICOLLET CLINIC (NPI: 1780621904; TIN: 410834920) and primary practice location at 55369-4400.

Fields' data goes back to 2015 and runs through 2024. For example, in 2015, this provider had 34 traditional Medicare patients, billed 129 HCPCS/CPT codes, and received $8,522 in Medicare payments. 2024 Part D data shows 243 prescription claims across 82 beneficiaries totaling $5,157 in drug costs, led by Dextroamphetamine-Amphet Er (Dextroamphetamine/Amphetamine). Open Payments data shows 1 records totaling $87. 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 has fewer than 5 years of reported Medicare Part B carrier billing data, so a reliable trend cannot be assigned. Concurrently, Part D prescription costs started with an early spike, then settled into a lower baseline, moving from $75,752 to $5,157. 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	34	129	$8,522
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	N/R	N/R
2022	N/R	N/R	N/R
2023	N/R	N/R	N/R
2024	N/R	N/R	N/R

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	90	532	$75,752
2016	33	191	$16,354
2017	26	78	$3,402
2018	59	125	$4,957
2019	75	167	$17,065
2020	30	101	$9,784
2021	73	119	$5,205
2022	63	124	$15,351
2023	129	327	$21,440
2024	82	243	$5,157

DME Billing Trend

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

No connected DME records

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

Top 5 Part B carrier billing codes in 2024

By total payments.

No connected Part B code-level records for 2024.

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	11	510	$1,069
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	13	378	$338
Aripiprazole	Aripiprazole	18	755	$325
Fluoxetine Hcl	Fluoxetine Hcl	15	810	$266
Gabapentin	Gabapentin	20	810	$255

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.	1	$87	Neuronetics, 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 Mary C. Fields, MD?

Tedicare shows public-source Medicare data for Mary C. Fields, MD (NPI 1861497745), 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 Mary C. Fields, MD have ACO affiliation data?

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

What billing organization is linked to Mary C. Fields, MD?

Mary C. Fields, MD is linked to PARK NICOLLET CLINIC (billing NPI 1780621904) in the available physician profile data.

Does Mary C. Fields, MD have Open Payments data?

Mary C. Fields, MD has 1 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.