Physician

Sidney Tan Chang, MD

According to 2025 Medicare claims, Sidney Chang, MD (NPI: 1790888006) practices ophthalmology in the Hagerstown-Martinsburg, MD-WV market, with the plurality of this provider's patient population coming from Washington, MD. This provider's primary affiliated billing organization is CHESAPEAKE EYE CARE AND LASER CENTER LLC (NPI: 1548296262; TIN: 52-2124249) and primary practice location at 21740-6665.

Chang's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 972 traditional Medicare patients, billed 3,233 HCPCS/CPT codes, and received $419,776 in Medicare payments. The top billing code was 66984 (Removal of cataract with insertion of prosthetic lens). Part D data shows 2,209 prescription claims across 635 beneficiaries totaling $839,929 in drug costs, led by Oxervate (Cenegermin-Bkbj). DME data shows 14 claims. Open Payments data shows 54 records totaling $1,255. 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 changed little. Concurrently, Part D prescription costs have risen steadily, from $212,295 to $839,929. In contrast, DME billing represents a smaller volume and changed little.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	924	3,434	$558,537
2016	1,135	3,959	$586,153
2017	1,085	4,077	$561,777
2018	1,044	3,681	$503,114
2019	1,139	3,883	$550,334
2020	993	3,008	$371,220
2021	1,259	3,899	$527,127
2022	1,192	3,826	$510,758
2023	964	3,180	$425,038
2024	972	3,233	$419,776

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	482	1,730	$212,295
2016	558	1,839	$227,512
2017	524	1,957	$264,798
2018	472	1,898	$256,339
2019	449	1,655	$349,656
2020	509	1,759	$288,244
2021	753	2,615	$395,794
2022	614	2,194	$400,798
2023	538	1,900	$443,799
2024	635	2,209	$839,929

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	167	167	$10,756
2016	215	216	$13,669
2017	199	200	$12,029
2018	140	141	$8,912
2019	188	188	$12,413
2020	103	103	$6,149
2021	93	93	$6,582
2022	58	60	$4,077
2023	32	32	$2,217
2024	13	14	$753

* / # = 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
66984	Removal of cataract with insertion of prosthetic lens	271	445	$415
99204	New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	217	217	$104
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	564	632	$87
92136	Measurement of corneal curvature and depth of eye	362	549	$29
92133	Imaging of optic nerve	219	227	$24

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Oxervate	Cenegermin-Bkbj	11	154	$501,456
Lumigan	Bimatoprost	124	9,369	$82,835
Restasis	Cyclosporine	43	3,105	$61,982
Combigan	Brimonidine Tartrate/Timolol	61	3,257	$29,376
Vyzulta	Latanoprostene Bunod	48	3,072	$27,360

Top 5 DME services in 2024

By Total Medicare Payment Amount.

HCPCS Code	HCPCS Description	Supplier Rental Indicator	Total Supplier Beneficiaries	Total Supplier Claims	Total Medicare Payment Amount
V2020	Frames, purchases	N	13	14	$753

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	54	$1,255	Alcon Vision LLC
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 Sidney Tan Chang, MD?

Tedicare shows public-source Medicare data for Sidney Tan Chang, MD (NPI 1790888006), 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 Sidney Tan Chang, MD have ACO affiliation data?

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

What billing organization is linked to Sidney Tan Chang, MD?

Sidney Tan Chang, MD is linked to CHESAPEAKE EYE CARE AND LASER CENTER LLC (billing NPI 1548296262) in the available physician profile data.

Does Sidney Tan Chang, MD have Open Payments data?

Sidney Tan Chang, MD has 54 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.