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PROVIDER PROFILE · NPI 1902888662

Warren ChangM.D.

PRACTICEINTEG HEALTH SYSTEM, P.C.See all providers at this practice →
OphthalmologyBloomington, INI
CROSS-REFERENCE

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ProviderScore
OIG/SAM exclusion screening, sanctions history
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QUALITY · MIPS · 2024
Final MIPS score
86.7
Quality
83.8
Cost
77.4
Improvement activities
40.0
Promoting interop.
0.0
Payment adjustment
0.49%
Group
PRESCRIBING · PART D · 2024
Total Rx claims
1,270
Beneficiaries
—
Total drug cost
$143K
Distinct drugs
22
Brand share
54.1%
Top prescribed drugs
Erythromycin Base272 claims
Latanoprost224 claims
Timolol Maleate135 claims
Tobramycin/Dexamethasone92 claims
Brimonidine Tartrate74 claims
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
2,809
Unique beneficiaries
—
Total services
14,236
Distinct HCPCS
28
Medicare payment
$1.8M
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 236 Ophthalmology providers in IN — top quintile (cohort median 2,608).
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
Total received
$777
Payment records
27
By payment type
Food and Beverage$777
REFERRAL NETWORK

Where Warren Chang's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 47 inbound referrers · 0 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
Integ Health System, P.C.
Ambulatory Surgical Center · Bloomington, IN
4991,551
Charles Huck
Optometry · Bloomington, IN
170398
INDIANA UNIVERSITY HEALTH BLOOMINGTON INC140336
Steven Holbrook
Optometry · Bloomington, IN
132303
INDIANA UNIVERSITY HEALTH INC98175
Layne Tait
Anesthesiology · Bloomington, IN
4397
Gerry Hash
Podiatry · Bloomington, IN
3354
Justin Hudson
Podiatry · Worthington, OH
2842
James Sowders
Optometry · Bedford, IN
2892
CHANG, COLIN2656
Nicholas Miller
Diagnostic Radiology · Bloomington, IN
2638
Eric Bannec
Internal Medicine · Bloomington, IN
2567
Refers patients to
Outbound — where patients go next
No outbound pairs above the suppression threshold.
Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.