Physician

Benjamin Siemanowski, M.D.

According to 2025 Medicare claims, Benjamin Siemanowski, M.D. (NPI: 1548301120) practices gastroenterology in the Bellingham, WA market, with the plurality of this provider's patient population coming from Whatcom, WA. This provider's primary affiliated billing organization is NORTHWEST GASTROENTEROLOGY PROFESSIONAL LLC (NPI: 1033278411; TIN: 911919200) and primary practice location at 98226-6610. Siemanowski is affiliated with the PSW ACO (ACO ID: A5323), participating under the MSSP model.

Siemanowski's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 399 traditional Medicare patients, billed 10,641 HCPCS/CPT codes, and received $177,322 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 1,125 prescription claims across 550 beneficiaries totaling $517,152 in drug costs, led by Humira(Cf) Pen (Adalimumab). 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 $93,359 to $177,322. Concurrently, Part D prescription costs did not follow a clear longitudinal pattern. 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	373	947	$93,359
2016	364	1,197	$89,507
2017	380	1,345	$86,678
2018	381	1,307	$82,751
2019	367	1,346	$87,021
2020	321	968	$72,640
2021	440	6,908	$143,881
2022	426	10,051	$189,165
2023	399	7,970	$193,321
2024	399	10,641	$177,322

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	188	486	$434,024
2016	291	608	$323,910
2017	291	711	$295,285
2018	307	736	$183,640
2019	274	749	$223,815
2020	302	822	$294,830
2021	407	1,086	$453,883
2022	449	1,062	$435,767
2023	475	1,038	$483,684
2024	550	1,125	$517,152

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	169	170	$210
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	124	155	$89
43239	Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	55	55	$73
88305	Pathology examination of tissue using a microscope, intermediate complexity	202	359	$27
G0500	Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	94	95	$5

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Humira(Cf) Pen	Adalimumab	29	812	$285,517
Humira Pen	Adalimumab	13	364	$81,673
Mesalamine	Mesalamine	53	2,566	$36,939
Sod Sulf-Potass Sulf-Mag Sulf	Sodium, Potassium,mag Sulfates	314	493	$20,617
Linzess	Linaclotide	12	428	$8,849

Top 5 DME services in 2024

No connected or detailed DME service-level records for 2024.

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 Benjamin Siemanowski, M.D.?

Tedicare shows public-source Medicare data for Benjamin Siemanowski, M.D. (NPI 1548301120), 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 Benjamin Siemanowski, M.D. have ACO affiliation data?

Benjamin Siemanowski, M.D. is shown with ACO affiliation data for PSW ACO (MSSP, ACO ID A5323).

What billing organization is linked to Benjamin Siemanowski, M.D.?

Benjamin Siemanowski, M.D. is linked to NORTHWEST GASTROENTEROLOGY PROFESSIONAL LLC (billing NPI 1033278411) in the available physician profile data.

Does Benjamin Siemanowski, M.D. 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.