Physician

Charles William Mcmahon, M.D.

According to 2025 Medicare claims, Charles Mcmahon, M.D. (NPI: 1861768053) practices gastroenterology in the Kansas City, MO-KS market, with the plurality of this provider's patient population coming from Jackson, MO. This provider's primary affiliated billing organization is MID AMERICA GASTRO INTESTINAL CONSULTANTS P C (NPI: 1710091228; TIN: 431356738) and primary practice location at 64111-5936.

Mcmahon's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 448 traditional Medicare patients, billed 25,644 HCPCS/CPT codes, and received $321,290 in Medicare payments. The top billing code was 45385 (Removal of polyps or growths of large bowel using an endoscope with mechanical snare). Part D data shows 868 prescription claims across 519 beneficiaries totaling $497,741 in drug costs, led by Stelara (Ustekinumab). Open Payments data shows 41 records totaling $819. 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 $32,693 to $321,290. Similarly, Part D prescription costs have risen steadily, from $41,035 to $497,741. 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	N/R	N/R	N/R
2016	N/R	N/R	N/R
2017	N/R	N/R	N/R
2018	175	348	$32,693
2019	458	870	$84,695
2020	354	714	$67,029
2021	377	2,303	$82,319
2022	403	4,800	$93,496
2023	421	18,788	$171,725
2024	448	25,644	$321,290

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	28	121	$41,035
2016	33	93	$70,382
2017	28	52	$26,294
2018	76	140	$14,442
2019	166	295	$22,272
2020	157	381	$47,251
2021	309	486	$54,302
2022	357	589	$53,377
2023	395	677	$339,645
2024	519	868	$497,741

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.

Code	Description	Patients	Clm Lines	Total Payment
45385	Removal of polyps or growths of large bowel using an endoscope with mechanical snare	137	141	$199
45380	Biopsy of large bowel using a flexible endoscope	177	178	$90
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	36	47	$85
43239	Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	91	95	$62
99231	Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes	23	27	$38

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Stelara	Ustekinumab	14	392	$382,906
Creon	Lipase/Protease/Amylase	12	384	$37,419
Sod Sulf-Potass Sulf-Mag Sulf	Sodium, Potassium,mag Sulfates	396	637	$26,494
Omeprazole	Omeprazole	149	9,747	$1,954
Budesonide Dr	Budesonide	16	824	$1,819

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.	41	$819	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 Charles William Mcmahon, M.D.?

Tedicare shows public-source Medicare data for Charles William Mcmahon, M.D. (NPI 1861768053), 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 Charles William Mcmahon, M.D. have ACO affiliation data?

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

What billing organization is linked to Charles William Mcmahon, M.D.?

Charles William Mcmahon, M.D. is linked to MID AMERICA GASTRO INTESTINAL CONSULTANTS P C (billing NPI 1710091228) in the available physician profile data.

Does Charles William Mcmahon, M.D. have Open Payments data?

Charles William Mcmahon, M.D. has 41 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.