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PROVIDER PROFILE · NPI 1003808494

Andrew ChangM.D.

PRACTICEDAVID M SHULTZ M D , INCSee all providers at this practice →
OphthalmologyNorthridge, CAI
CROSS-REFERENCE

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FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 050040
Hospital
REFERRAL NETWORK

Where Andrew 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). 6 inbound referrers · 13 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
Unilab Corporation
Clinical Laboratory · West Hills, CA
79201
DIGNITY COMMUNITY CARE3458
Primex Clinical Laboratories Inc.
Clinical Laboratory · Van Nuys, CA
1536
PASADENA HOSPITAL ASSOCIATION, LTD1317
COUNTY OF LOS ANGELES1125
PROVIDENCE HEALTH SYSTEM - SOUTHERN CALIFORNIA1115
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
Unilab Corporation
Clinical Laboratory · West Hills, CA
77160
DIGNITY COMMUNITY CARE4070
Valley Physicians Surgery Center At Northridge Llc
Ambulatory Surgical Center · Northridge, CA
3895
Laboratory Corporation Of America
Clinical Laboratory · San Diego, CA
2959
COUNTY OF LOS ANGELES2565
PASADENA HOSPITAL ASSOCIATION, LTD1623
Huntington Ambulatory Surgery Center, Llc
Ambulatory Surgical Center · Pasadena, CA
1648
Steven Cantamout
Anesthesiology · Northridge, CA
1527
WESTERN HEALTH SCIENCES MEDICAL LAB1218
Zouheir Elias
Cardiology · Northridge, CA
1118
Gustavo Machicado
Gastroenterology · Northridge, CA
1117
Mehrdad Ariani
Cardiology · Northridge, CA
1130
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.
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
1,250
Unique beneficiaries
—
Total services
1,503
Distinct HCPCS
10
Medicare payment
$135K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 2,144 Ophthalmology providers in CA — below median (cohort median 1,859).
QUALITY · MIPS · 2024
Final MIPS score
75.0
Quality
0.0
Cost
80.7
Improvement activities
0.0
Promoting interop.
0.0
Payment adjustment
0.00%
Individual
PRESCRIBING · PART D · 2024
Total Rx claims
2,950
Beneficiaries
—
Total drug cost
$182K
Distinct drugs
17
Brand share
20.8%
Top prescribed drugs
Latanoprost914 claims
Prednisolone Acetate374 claims
Timolol Maleate360 claims
Ofloxacin267 claims
Dorzolamide Hcl/Timolol Maleat231 claims
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
Total received
$484
Payment records
10
By payment type
Food and Beverage$484