Physician

Margaret Amy Chang, M.D.

According to 2025 Medicare claims, Margaret Chang, M.D. (NPI: 1477504405) practices ophthalmology in the Sacramento-Roseville-Folsom, CA market, with the plurality of this provider's patient population coming from Sacramento, CA. This provider's primary affiliated billing organization is VITREO-RETINAL MEDICAL GROUP, INC. (NPI: 1841383882; TIN: 942442567) and primary practice location at 95841-2013. Chang is affiliated with the NeueHealth Premier ACO, LLC (ACO ID: D0181) and NeueHealth Community ACO, LLC (ACO ID: D0324), participating under the REACH model.

Chang's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 1,563 traditional Medicare patients, billed 67,794 HCPCS/CPT codes, and received $4,351,246 in Medicare payments. The top billing code was 92235 (Exam of retinal blood vessels using a special camera after injection of a dye). Part D data shows 581 prescription claims across 207 beneficiaries totaling $24,597 in drug costs, led by Ketorolac Tromethamine (Ketorolac Tromethamine). Open Payments data shows 319 records totaling $2,265,723. 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. Similarly, Part D prescription costs have changed little. 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	2,673	31,468	$5,665,538
2016	2,212	26,703	$5,090,135
2017	2,001	24,746	$4,820,954
2018	2,125	24,656	$4,736,467
2019	2,124	23,885	$4,578,770
2020	2,138	22,759	$4,620,479
2021	2,070	22,557	$4,732,825
2022	1,829	22,201	$4,010,727
2023	1,658	52,296	$4,369,584
2024	1,563	67,794	$4,351,246

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	230	614	$36,068
2016	207	488	$25,423
2017	198	553	$29,936
2018	229	604	$34,418
2019	211	527	$30,704
2020	218	563	$28,975
2021	215	623	$37,796
2022	223	611	$35,097
2023	214	595	$38,725
2024	207	581	$24,597

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
92235	Exam of retinal blood vessels using a special camera after injection of a dye	309	334	$139
92014	Established patient complete exam of visual system	851	1,136	$104
67028	Injection of drug into eye	557	2,166	$103
92012	Established patient problem focused exam of visual system	460	685	$69
92134	Imaging of retina	1,443	3,595	$33

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Ketorolac Tromethamine	Ketorolac Tromethamine	201	6,765	$6,404
Prednisolone Acetate	Prednisolone Acetate	122	4,453	$5,886
Brimonidine Tartrate-Timolol	Brimonidine Tartrate/Timolol	13	810	$1,198
Ofloxacin	Ofloxacin	95	1,857	$1,136
Brimonidine Tartrate	Brimonidine Tartrate	20	1,362	$696

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.	72	$68,720	Genentech, Inc.
Research Payments	Reported research-related payment or transfer-of-value amount.	247	$2,197,003	Novartis Pharmaceuticals Corporation
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 Margaret Amy Chang, M.D.?

Tedicare shows public-source Medicare data for Margaret Amy Chang, M.D. (NPI 1477504405), 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 Margaret Amy Chang, M.D. have ACO affiliation data?

Margaret Amy Chang, M.D. is shown with ACO affiliation data for NeueHealth Premier ACO, LLC (REACH, ACO ID D0181) and NeueHealth Community ACO, LLC (REACH, ACO ID D0324).

What billing organization is linked to Margaret Amy Chang, M.D.?

Margaret Amy Chang, M.D. is linked to VITREO-RETINAL MEDICAL GROUP, INC. (billing NPI 1841383882) in the available physician profile data.

Does Margaret Amy Chang, M.D. have Open Payments data?

Margaret Amy Chang, M.D. has 319 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.