Physician

Aaron B Greenspan, MD

According to 2025 Medicare claims, Aaron Greenspan, MD (NPI: 1558382911) practices gastroenterology in the St. Louis, MO-IL market, with the plurality of this provider's patient population coming from St. Louis, MO. This provider's primary affiliated billing organization is WASHINGTON UNIVERSITY (NPI: 1992746903; TIN: 430653611) and primary practice location at 63110-1003. Greenspan is affiliated with the IRCCO (ACO ID: A2619), HSHS ACO, L.L.C. (ACO ID: A2783), and Quality Health Partners, LLC (ACO ID: A5553), participating under the MSSP model.

Greenspan's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 211 traditional Medicare patients, billed 350 HCPCS/CPT codes, and received $33,112 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 1,223 prescription claims across 365 beneficiaries totaling $901,477 in drug costs, led by Stelara (Ustekinumab). Open Payments data shows 14 records totaling $643. 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 declined steadily, from $204,872 to $33,112. Concurrently, Part D prescription costs have moved up and down with repeated peaks and valleys, starting at $790,976 and ending at $901,477. 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	693	1,528	$204,872
2016	742	1,867	$221,304
2017	690	1,545	$158,200
2018	611	1,225	$124,823
2019	882	2,050	$199,179
2020	819	2,127	$203,898
2021	708	1,750	$153,712
2022	498	860	$82,368
2023	342	597	$53,379
2024	211	350	$33,112

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	176	798	$790,976
2016	184	1,027	$333,204
2017	181	875	$452,559
2018	178	795	$157,190
2019	253	834	$105,996
2020	258	1,047	$179,186
2021	242	1,058	$301,710
2022	347	1,440	$422,207
2023	351	1,711	$728,922
2024	365	1,223	$901,477

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	29	30	$187
45378	Diagnostic exam of large bowel using a flexible endoscope	41	41	$116
45380	Biopsy of large bowel using a flexible endoscope	37	37	$103
43239	Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	22	22	$64
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	39	41	$44

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Stelara	Ustekinumab	19	748	$517,140
Humira(Cf) Pen	Adalimumab	14	392	$97,269
Linzess	Linaclotide	69	2,670	$49,415
Creon	Lipase/Protease/Amylase	12	462	$31,152
Viberzi	Eluxadoline	15	450	$19,972

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.	14	$643	Janssen Biotech, 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 Aaron B. Greenspan, MD?

Tedicare shows public-source Medicare data for Aaron B. Greenspan, MD (NPI 1558382911), 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 Aaron B. Greenspan, MD have ACO affiliation data?

Aaron B. Greenspan, MD is shown with ACO affiliation data for IRCCO (MSSP, ACO ID A2619), HSHS ACO, L.L.C. (MSSP, ACO ID A2783), and Quality Health Partners, LLC (MSSP, ACO ID A5553).

What billing organization is linked to Aaron B. Greenspan, MD?

Aaron B. Greenspan, MD is linked to WASHINGTON UNIVERSITY (billing NPI 1992746903) in the available physician profile data.

Does Aaron B. Greenspan, MD have Open Payments data?

Aaron B. Greenspan, MD has 14 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.