Physician

Nathaniel Robert Stewart, MD

According to 2025 Medicare claims, Nathaniel Stewart, MD (NPI: 1063773422) practices internal medicine in the South Bend-Mishawaka, IN-MI market, with the plurality of this provider's patient population coming from St. Joseph, IN. This provider's primary affiliated billing organization is SAINT JOSEPH REGIONAL MEDICAL CENTER, INC. (NPI: 1467406074; TIN: 351568821) and primary practice location at 46530-9226. Stewart is affiliated with the CHA ACO, LLC (ACO ID: A2207) and Trinity Health Integrated Care (ACO ID: A3454), participating under the MSSP model.

Stewart's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 513 traditional Medicare patients, billed 2,825 HCPCS/CPT codes, and received $134,202 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 13,851 prescription claims across 898 beneficiaries totaling $1,410,960 in drug costs, led by Trulicity (Dulaglutide). DME data shows 523 claims. No Open Payments records. 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 sharply higher in recent years, from $14,283 to $134,202. Similarly, Part D prescription costs have risen steadily, from $42,145 to $1,410,960. For DME billing, reported payments rose steadily, from $455 to $46,829.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	175	323	$14,283
2016	169	495	$21,634
2017	278	1,015	$32,852
2018	320	1,650	$50,385
2019	452	2,210	$101,774
2020	411	1,735	$86,291
2021	408	1,718	$83,404
2022	555	2,038	$108,550
2023	515	2,835	$141,321
2024	513	2,825	$134,202

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	138	969	$42,145
2016	169	1,699	$86,388
2017	257	2,737	$144,650
2018	402	4,407	$388,578
2019	761	5,630	$536,515
2020	712	10,688	$980,485
2021	723	11,165	$1,117,279
2022	989	11,162	$1,128,646
2023	969	12,724	$1,349,408
2024	898	13,851	$1,410,960

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	N/R	17	$278
2016	N/R	N/R	N/R
2017	N/R	37	$425
2018	18	58	$568
2019	24	141	$2,987
2020	46	243	$11,816
2021	91	356	$18,376
2022	83	331	$16,605
2023	214	533	$33,557
2024	183	523	$43,640

* / # = 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	225	225	$120
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	273	428	$71
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	342	586	$51
83036	Hemoglobin a1c level	145	248	$9
36415	Insertion of needle into vein for collection of blood sample	290	396	$9

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Trulicity	Dulaglutide	172	5,828	$196,371
Ozempic	Semaglutide	128	4,508	$149,450
Jardiance	Empagliflozin	147	7,409	$146,163
Mounjaro	Tirzepatide	96	3,472	$130,031
Eliquis	Apixaban	104	5,680	$108,494

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	16	62	$30,687
E0601	Continuous positive airway pressure (cpap) device	Y	N/R	58	$1,828
A7031	Face mask interface, replacement for full face mask, each	N	13	25	$1,656
A7032	Cushion for use on nasal mask interface, replacement only, each	N	N/R	19	$1,473
A7034	Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap	N	15	31	$1,411

Open Payments Summary

No connected Open Payments records were found for this physician in General Payments, Research Payments, or Ownership / Investment Interests.

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FAQ

What Medicare data is available for Nathaniel Robert Stewart, MD?

Tedicare shows public-source Medicare data for Nathaniel Robert Stewart, MD (NPI 1063773422), 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 Nathaniel Robert Stewart, MD have ACO affiliation data?

Nathaniel Robert Stewart, MD is shown with ACO affiliation data for CHA ACO, LLC (MSSP, ACO ID A2207) and Trinity Health Integrated Care (MSSP, ACO ID A3454).

What billing organization is linked to Nathaniel Robert Stewart, MD?

Nathaniel Robert Stewart, MD is linked to SAINT JOSEPH REGIONAL MEDICAL CENTER, INC. (billing NPI 1467406074) in the available physician profile data.

Does Nathaniel Robert Stewart, MD have Open Payments data?

No connected Open Payments records are shown for this physician in the available General Payments, Research Payments, or Ownership / Investment Interests 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.