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John Jae Young Chang, MD

NPI 1447279039ActiveIndividual· Internal Medicine, Nephrology· West Haven, CT

Internal Medicine, Nephrology (MD) in West Haven, Connecticut, trained at Yale University School of Medicine (class of 1999). 27 Medicare patients in 2024, $7,661 paid; nearly all of their 189 Part D prescriptions were generic (98%).

Overview

NPI1447279039
StatusActive
Entity typeIndividual
CredentialMD
Sole proprietorYes
NPI issuedJul 18, 2006
Last updated in NPPESJan 14, 2015

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine, Nephrology Primary207RN0300X041357CT

About license numbers in NPPES

Exclusion screening

ListResultDetails
HHS-OIG LEIE · Nov 10, 2026No matchChecked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026No match—
New York OMIG · Nov 11, 2026No match—
Ohio Medicaid · Nov 11, 2026No match—
Pennsylvania Medicheck · Nov 11, 2026No match—
Washington HCA · Nov 11, 2026No match—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)Enrolled Practitioner - Nephrology (CT)
Accepts assignmentYes (participating)

Medicare services in 2024

Medicare patients27
Services billed85 across 9 procedure codes
Paid by Medicare$7,661

Part D prescriptions in 2024

Prescriptions (claims)189 · 408 30-day fills
Patients43
Total drug cost$8,388
Generic share98% of claims

Medicare sources and data years

Education and affiliations

Medical schoolYale University School of Medicine
Graduation year1999
Medicare specialtyNephrology
Secondary specialtiesInternal Medicine
TelehealthOffers telehealth

Medical group

Hospital affiliation

Source: CMS Care Compare

Industry payments (Open Payments)

None reported for 2025 or 2024.

Receiving payments does not imply wrongdoing. What Open Payments covers ·original records

Other nephrologists in West Haven

All nephrologists in Connecticut