Physician

Brett Dennis Gerwin, M.D.

According to 2025 Medicare claims, Brett Gerwin, M.D. (NPI: 1306992003) practices ophthalmology in the Chattanooga, TN-GA market, with the plurality of this provider's patient population coming from Hamilton, TN. This provider's primary affiliated billing organization is RETINA SPECIALISTS OF TENNESSEE PLLC (NPI: 1124383393; TIN: 45-5025073) and primary practice location at 37415-6959.

Gerwin's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 574 traditional Medicare patients, billed 10,401 HCPCS/CPT codes, and received $790,198 in Medicare payments. The top billing code was 92004 (New patient complete exam of visual system). Part D data shows 242 prescription claims across 64 beneficiaries totaling $174,655 in drug costs, led by Eylea (Aflibercept). Open Payments data shows 6 records totaling $139. 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 did not follow a clear longitudinal pattern. Concurrently, Part D prescription costs have moved sharply higher in recent years, from $14,114 to $174,655. 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	540	4,281	$469,385
2016	652	5,555	$695,833
2017	657	6,091	$835,863
2018	673	6,067	$821,299
2019	655	6,405	$995,761
2020	552	5,907	$907,052
2021	613	6,245	$943,139
2022	572	5,770	$821,864
2023	560	7,578	$801,675
2024	574	10,401	$790,198

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	79	297	$14,114
2016	98	395	$14,605
2017	95	499	$18,224
2018	96	394	$19,465
2019	92	394	$24,383
2020	84	413	$24,118
2021	84	356	$22,372
2022	76	327	$35,481
2023	59	238	$54,472
2024	64	242	$174,655

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
92004	New patient complete exam of visual system	132	132	$104
67028	Injection of drug into eye	220	1,135	$86
92014	Established patient complete exam of visual system	250	309	$82
J9035	Injection, bevacizumab, 10 mg	147	757	$53
92134	Imaging of retina	476	1,462	$28

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Eylea	Aflibercept	35	980	$92,758
Prednisolone Acetate	Prednisolone Acetate	54	1,679	$2,015
Ketorolac Tromethamine	Ketorolac Tromethamine	20	946	$634
Eplerenone	Eplerenone	19	810	$586
Dorzolamide-Timolol	Dorzolamide Hcl/Timolol Maleat	12	801	$123

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.	6	$139	Regeneron Healthcare Solutions, 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

Explore More Providers

FAQ

What Medicare data is available for Brett Dennis Gerwin, M.D.?

Tedicare shows public-source Medicare data for Brett Dennis Gerwin, M.D. (NPI 1306992003), 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 Brett Dennis Gerwin, 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 Brett Dennis Gerwin, M.D.?

Brett Dennis Gerwin, M.D. is linked to RETINA SPECIALISTS OF TENNESSEE PLLC (billing NPI 1124383393) in the available physician profile data.

Does Brett Dennis Gerwin, M.D. have Open Payments data?

Brett Dennis Gerwin, M.D. has 6 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.