John Jae Young Chang, MD
Nephrology Physician · West Haven, CT
John Jae Young Chang, MD is a nephrology physician with a practice address in West Haven, Connecticut, and NPI 1447279039, issued on Jul 18, 2006. Check the license (Connecticut 041357, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John Jae Young Chang
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 041357 CT
Self-reported in NPPES; status is on the state search - Practice location
- 950 Campbell Ave, West Haven, CT 06516
- Phone
- (203) 932-5711
- Enumerated
- Jul 18, 2006
- Record last updated
- Jan 14, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (203) 937-3474
- Medicare enrollment
- Enrolled (PECOS I20060808000266); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 167 in Connecticut → Look up another NPI →
Also registered at 950 Campbell Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew Abbott, LCSWSocial Worker1790734986
- Erica Abel, PH.D.Clinical Psychologist1982971222
- Audrey Abelleira, PHARMDPharmacist1831671577
- Mary Abraham, PHARMDPharmacist1386344950
- Linda Accordino, RN, MSNGerontology Nurse Practitioner1396853289
- Jenna Adamowicz, PH.D.Clinical Psychologist1356271266
Verify John Jae Young Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 041357Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average nephrology physician in 2024
189 Medicare Part D claims for 43 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Midodrine Hcl32 claims
- Amlodipine Besylate26 claims
- Losartan Potassium22 claims
- Fludrocortisone Acetate15 claims
- Pyridostigmine Bromide15 claims
- Clonidine14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 73.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Yale UniversityNew Haven, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Jae Young Chang among 167 nephrology physician records in Connecticut
John Jae Young Chang, MD is one of 167 nephrology physician records with a practice address in Connecticut. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 30% of them.
- NPI issued2006 · 30% of these records are older, 50% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1999 · median 2002 among the 116 with a school on file
- Record last updated2015 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Connecticut
There are 167 nephrology physician records in Connecticut.
All 167 in Connecticut → Every provider in West Haven → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Susan Crowley, MDWest Haven, CT 065161356440937
- Gary Desir, M.D.West Haven, CT 065161063523082
- Sylvester Dorobisz, MDWest Haven, CT 065161508363789
- David Geller, MDWest Haven, CT 065161548245046
- Crystal Jobson, MDWest Haven, CT 065161467931220
- Namrata Krishnan, MD, MBBSWest Haven, CT 065161306063011
- Jianchao Xu, M.D., PH.D.West Haven, CT 065161427146976
- Ali Abu-Alfa, MDNew Haven, CT 065191841274610
Common questions
What is John Jae Young Chang, MD's NPI number?
John Jae Young Chang, MD's National Provider Identifier (NPI) is 1447279039, issued on Jul 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Jae Young Chang, MD located?
The NPPES record lists a practice address at 950 Campbell Ave, West Haven, CT, 06516. Phone: (203) 932-5711. Providers update this record themselves, so call before visiting.
How can I verify John Jae Young Chang, MD's license?
NPPES lists Connecticut license number 041357, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Jae Young Chang, MD prescribe under Medicare Part D?
In 2024, John Jae Young Chang, MD had 189 Medicare Part D claims for 43 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is John Jae Young Chang, MD's MIPS final score?
The 2023 MIPS final score is 73.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.