PROVIDER PROFILE · NPI 1912083353

Elmer ChangM.D.

PRACTICEMISSION INTERNAL MEDICAL GROUP, INC.See all providers at this practice →

GastroenterologyMission Viejo, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,099

Unique beneficiaries

—

Total services

1,259

Distinct HCPCS

Medicare payment

$114K

Peer benchmark

Total Medicare services vs. 1,398 Gastroenterology providers in CA — top quintile (cohort median 750).

PRESCRIBING · PART D · 2024

Total Rx claims

2,205

Beneficiaries

—

Total drug cost

$335K

Distinct drugs

Brand share

22.2%

Top prescribed drugs

Omeprazole719 claims

Famotidine534 claims

Pantoprazole Sodium197 claims

Sodium, Potassium,mag Sulfates184 claims

Sucralfate99 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$4K

Payment records

173

By payment type

Food and Beverage$4K

Education$110

REFERRAL NETWORK

Where Elmer 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). 15 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MIYAMOTO, ERIC	113	264
Unilab Corporation Clinical Laboratory · West Hills, CA	88	359
Jackson Penry Diagnostic Radiology · Mission Viejo, CA	45	93
Christopher Vanley Pathology · Laguna Beach, CA	44	101
Steven Sorenson Diagnostic Radiology · Redlands, CA	43	152
Jeffrey Dym Diagnostic Radiology · Laguna Niguel, CA	35	76
Navid Jahed Diagnostic Radiology · Mission Viejo, CA	27	60
Michael Truong Endocrinology · Mission Viejo, CA	19	39
SADDLEBACK MEMORIAL MEDICAL CENTER	17	49
Chad Wadell Internal Medicine · Mission Viejo, CA	17	61
Tze Ip Cardiology · Mission Viejo, CA	16	31
Absalom Hepner Cardiology · Mission Viejo, CA	13	37

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.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history