Physician

John Joseph Maciejewski, M.D.

According to 2025 Medicare claims, John Maciejewski, M.D. (NPI: 1235334137) practices hematology in the Detroit-Dearborn-Livonia, MI market, with the plurality of this provider's patient population coming from Wayne, MI. This provider's primary affiliated billing organization is REGENTS OF THE UNIVERSITY OF MICHIGAN (NPI: 1881626265; TIN: 386006309) and primary practice location at 48109-5000. Maciejewski is affiliated with the POM ACO (ACO ID: A1297), participating under the MSSP model.

Maciejewski's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 66 traditional Medicare patients, billed 444 HCPCS/CPT codes, and received $40,686 in Medicare payments. The top billing code was 99223 (Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes). Part D data shows 344 prescription claims across 35 beneficiaries totaling $131,474 in drug costs, led by Cresemba (Isavuconazonium Sulfate). 2023 DME data shows 11 claims. Open Payments data shows 3 records totaling $1,344. 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 from a higher plateau to a lower plateau, from $62,742 to $40,686. Concurrently, Part D prescription costs have moved up and down with repeated peaks and valleys, starting at $502,989 and ending at $131,474. 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	108	711	$62,742
2016	92	761	$71,436
2017	106	758	$72,890
2018	76	524	$52,909
2019	56	325	$26,839
2020	55	324	$29,344
2021	65	394	$37,416
2022	68	309	$29,188
2023	63	338	$34,296
2024	66	444	$40,686

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	55	647	$502,989
2016	44	645	$720,014
2017	36	638	$1,063,687
2018	29	454	$1,064,064
2019	14	44	$200,144
2020	21	116	$81,602
2021	29	149	$208,873
2022	26	225	$328,329
2023	29	287	$394,354
2024	35	344	$131,474

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	N/R	29	$2,764
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	33	$14,236
2023	N/R	11	$2,995
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
99223	Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	15	16	$139
99215	Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	28	91	$107
99233	Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	35	258	$95
99239	Hospital discharge day management, more than 30 minutes	12	13	$91
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	14	35	$13

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Cresemba	Isavuconazonium Sulfate	12	336	$74,195
Eliquis	Apixaban	13	450	$8,610
Ursodiol	Ursodiol	26	1,090	$2,735
Acyclovir	Acyclovir	63	2,910	$1,360
Fluconazole	Fluconazole	15	518	$503

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	$215	National Marrow Donor Program
Research Payments	Reported research-related payment or transfer-of-value amount.	2	$1,129	National Marrow Donor Program
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 Joseph Maciejewski, M.D.?

Tedicare shows public-source Medicare data for John Joseph Maciejewski, M.D. (NPI 1235334137), 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 Joseph Maciejewski, M.D. have ACO affiliation data?

John Joseph Maciejewski, M.D. is shown with ACO affiliation data for POM ACO (MSSP, ACO ID A1297).

What billing organization is linked to John Joseph Maciejewski, M.D.?

John Joseph Maciejewski, M.D. is linked to REGENTS OF THE UNIVERSITY OF MICHIGAN (billing NPI 1881626265) in the available physician profile data.

Does John Joseph Maciejewski, M.D. have Open Payments data?

John Joseph Maciejewski, M.D. has 3 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.