Physician

Ian S Katznelson, M.D.

According to 2025 Medicare claims, Ian Katznelson, M.D. (NPI: 1194779082) practices neurology in the Lake County, IL market, with the plurality of this provider's patient population coming from Lake, IL. This provider's primary affiliated billing organization is NORTHWESTERN MEDICAL FACULTY FOUNDATION (NPI: 1346235314; TIN: 363097297) and primary practice location at 60045-1601. Katznelson is affiliated with the Northwestern Medicine Physician Network ACO (ACO ID: A2620), participating under the MSSP model.

Katznelson's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 731 traditional Medicare patients, billed 8,044 HCPCS/CPT codes, and received $271,121 in Medicare payments. The top billing code was 99215 (Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more). Part D data shows 1,298 prescription claims across 260 beneficiaries totaling $462,780 in drug costs, led by Avonex (4 Pack) (Interferon Beta-1a). DME data shows 2,734 claims. Open Payments data shows 24 records totaling $565. 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 $93,477 to $271,121. Similarly, Part D prescription costs have risen steadily, from $257,730 to $462,780. For DME billing, reported payments moved sharply higher in recent years, from $21,776 to $141,199.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	472	1,030	$93,477
2016	552	1,192	$110,462
2017	602	1,291	$113,674
2018	670	1,453	$117,008
2019	660	2,690	$130,940
2020	637	2,759	$147,976
2021	704	2,566	$148,638
2022	717	1,819	$128,609
2023	739	4,160	$185,500
2024	731	8,044	$271,121

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	134	738	$257,730
2016	161	796	$315,021
2017	182	895	$390,604
2018	179	972	$289,229
2019	182	959	$420,244
2020	195	940	$426,017
2021	236	1,196	$662,379
2022	256	1,168	$448,983
2023	260	1,214	$599,368
2024	260	1,298	$462,780

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	260	557	$21,123
2016	365	835	$23,566
2017	475	1,155	$36,723
2018	642	1,510	$48,788
2019	786	1,816	$65,244
2020	948	2,166	$68,768
2021	1,105	2,472	$85,962
2022	1,094	2,602	$97,896
2023	1,172	3,029	$117,000
2024	1,086	2,734	$116,483

* / # = 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
99215	Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	139	163	$146
99443	Telephone medical discussion with physician, 21-30 minutes	51	53	$99
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	408	551	$96
95800	Sleep study including heart rate, breathing, and sleep time	89	92	$30
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	429	616	$13

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Avonex (4 Pack)	Interferon Beta-1a	13	364	$110,649
Keppra	Levetiracetam	13	1,110	$39,401
Ubrelvy	Ubrogepant	25	557	$36,575
Lamictal	Lamotrigine	13	1,050	$27,637
Briviact	Brivaracetam	14	480	$22,616

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
A7031	Face mask interface, replacement for full face mask, each	N	73	204	$17,980
A7030	Full face mask used with positive airway pressure device, each	N	78	218	$17,517
A4604	Tubing with integrated heating element for use with positive airway pressure device	N	145	388	$14,218
A7034	Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap	N	92	241	$12,221
A7032	Cushion for use on nasal mask interface, replacement only, each	N	50	123	$11,887

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	24	$565	ABBVIE 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 Ian S. Katznelson, M.D.?

Tedicare shows public-source Medicare data for Ian S. Katznelson, M.D. (NPI 1194779082), 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 Ian S. Katznelson, M.D. have ACO affiliation data?

Ian S. Katznelson, M.D. is shown with ACO affiliation data for Northwestern Medicine Physician Network ACO (MSSP, ACO ID A2620).

What billing organization is linked to Ian S. Katznelson, M.D.?

Ian S. Katznelson, M.D. is linked to NORTHWESTERN MEDICAL FACULTY FOUNDATION (billing NPI 1346235314) in the available physician profile data.

Does Ian S. Katznelson, M.D. have Open Payments data?

Ian S. Katznelson, M.D. has 24 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.