Physician

Warren Jeffrey Chang, M.D.

According to 2025 Medicare claims, Warren Chang, M.D. (NPI: 1902888662) practices ophthalmology in the Bloomington, IN market, with the plurality of this provider's patient population coming from Monroe, IN. This provider's primary affiliated billing organization is INTEG HEALTH SYSTEM, P.C. (NPI: 1215919105; TIN: 352045236) and primary practice location at 47403-2216.

Chang's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 1,217 traditional Medicare patients, billed 15,693 HCPCS/CPT codes, and received $1,832,101 in Medicare payments. The top billing code was 66984 (Removal of cataract with insertion of prosthetic lens). Part D data shows 1,364 prescription claims across 445 beneficiaries totaling $171,643 in drug costs, led by Lumigan (Bimatoprost). 2020 DME data shows 12 claims. Open Payments data shows 27 records totaling $777. 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. 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	1,911	10,341	$1,586,654
2016	1,910	11,278	$2,047,050
2017	1,909	13,193	$2,060,963
2018	1,906	14,153	$2,200,488
2019	1,829	14,226	$2,218,451
2020	1,418	11,742	$1,662,313
2021	1,491	12,951	$1,724,735
2022	1,382	13,093	$1,658,232
2023	1,262	14,288	$1,606,028
2024	1,217	15,693	$1,832,101

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	524	1,678	$170,607
2016	575	1,704	$176,489
2017	452	1,541	$185,001
2018	417	1,457	$162,482
2019	443	1,468	$180,315
2020	387	1,349	$172,418
2021	423	1,226	$147,930
2022	404	1,140	$154,950
2023	430	1,202	$177,817
2024	445	1,364	$171,643

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	30	32	$1,525
2016	31	31	$1,576
2017	14	14	$621
2018	41	41	$2,152
2019	N/R	N/R	N/R
2020	12	12	$546
2021	N/R	N/R	N/R
2022	N/R	N/R	N/R
2023	N/R	N/R	N/R
2024	N/R	N/R	N/R

* / # = 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	382	700	$362
66821	Removal of recurring cataract in lens capsule using a laser	221	314	$213
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	227	284	$84
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	213	259	$50
92136	Measurement of corneal curvature and depth of eye	397	732	$29

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Lumigan	Bimatoprost	66	3,669	$33,777
Restasis	Cyclosporine	15	1,035	$20,111
Xiidra	Lifitegrast	16	1,020	$17,686
Rocklatan	Netarsudil Mesylat/Latanoprost	21	823	$10,396
Restasis Multidose	Cyclosporine	13	390	$8,448

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.	27	$777	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

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FAQ

What Medicare data is available for Warren Jeffrey Chang, M.D.?

Tedicare shows public-source Medicare data for Warren Jeffrey Chang, M.D. (NPI 1902888662), 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 Warren Jeffrey Chang, 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 Warren Jeffrey Chang, M.D.?

Warren Jeffrey Chang, M.D. is linked to INTEG HEALTH SYSTEM, P.C. (billing NPI 1215919105) in the available physician profile data.

Does Warren Jeffrey Chang, M.D. have Open Payments data?

Warren Jeffrey Chang, M.D. has 27 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.