Physician

Nathan R. Walker, M.D.

According to 2025 Medicare claims, Nathan Walker, M.D. (NPI: 1629087325) practices internal medicine in the Champaign-Urbana, IL market, with the plurality of this provider's patient population coming from Champaign, IL. This provider's primary affiliated billing organization is CHRISTIE CLINIC, PLLC (NPI: 1871523829; TIN: 370802668) and primary practice location at 61822-6824. Walker is affiliated with the IRCCO (ACO ID: A2619) and Stratum Med ACO (ACO ID: A4527), participating under the MSSP model.

Walker's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 551 traditional Medicare patients, billed 15,566 HCPCS/CPT codes, and received $266,912 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 17,719 prescription claims across 1,152 beneficiaries totaling $2,044,676 in drug costs, led by Eliquis (Apixaban). DME data shows 378 claims. Open Payments data shows 1 records totaling $20. 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 risen steadily, from $134,588 to $266,912. Similarly, Part D prescription costs have moved from a lower plateau to a higher plateau, from $923,171 to $2,044,676. In contrast, DME billing represents a smaller volume and moved up and down with repeated peaks and valleys, starting at $12,945 and ending at $18,400.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	427	17,784	$134,588
2016	463	19,803	$156,337
2017	544	15,126	$163,149
2018	609	22,475	$213,971
2019	618	24,622	$209,424
2020	618	18,557	$246,591
2021	604	17,987	$285,208
2022	572	15,755	$282,106
2023	594	9,370	$261,110
2024	551	15,566	$266,912

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	588	11,119	$923,171
2016	606	11,492	$986,655
2017	677	12,002	$1,082,054
2018	811	12,753	$1,216,645
2019	914	14,121	$1,386,674
2020	1,042	16,822	$1,701,726
2021	1,052	17,360	$1,750,151
2022	1,082	16,982	$1,776,144
2023	1,130	17,033	$2,037,086
2024	1,152	17,719	$2,044,676

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	80	274	$7,281
2016	92	419	$13,616
2017	101	408	$10,213
2018	145	441	$10,896
2019	112	452	$15,350
2020	78	441	$17,188
2021	68	347	$14,332
2022	102	298	$14,831
2023	50	309	$19,327
2024	53	378	$16,013

* / # = 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	442	898	$81
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	441	956	$11
80053	Blood test, comprehensive group of blood chemicals	371	548	$10
83036	Hemoglobin a1c level	356	473	$9
36415	Insertion of needle into vein for collection of blood sample	391	700	$9

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Eliquis	Apixaban	219	13,267	$254,959
Jardiance	Empagliflozin	187	11,857	$227,509
Ozempic	Semaglutide	157	6,885	$226,562
Mounjaro	Tirzepatide	91	3,174	$117,691
Xarelto	Rivaroxaban	94	6,120	$111,145

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	29	$6,573
E0601	Continuous positive airway pressure (cpap) device	Y	N/R	60	$1,775
A7032	Cushion for use on nasal mask interface, replacement only, each	N	N/R	14	$1,369
E1390	Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate	Y	N/R	15	$1,104
A7034	Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap	N	N/R	23	$1,092

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	1	$20	Kowa Pharmaceuticals America, 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 Nathan R. Walker, M.D.?

Tedicare shows public-source Medicare data for Nathan R. Walker, M.D. (NPI 1629087325), 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 Nathan R. Walker, M.D. have ACO affiliation data?

Nathan R. Walker, M.D. is shown with ACO affiliation data for IRCCO (MSSP, ACO ID A2619) and Stratum Med ACO (MSSP, ACO ID A4527).

What billing organization is linked to Nathan R. Walker, M.D.?

Nathan R. Walker, M.D. is linked to CHRISTIE CLINIC, PLLC (billing NPI 1871523829) in the available physician profile data.

Does Nathan R. Walker, M.D. have Open Payments data?

Nathan R. Walker, M.D. 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.