Robert Y. Chang, MD
Psychiatry Physician · New Haven, CT
Robert Y. Chang, MD is a psychiatry physician with a practice address in New Haven, Connecticut, and NPI 1801960190, issued on Nov 20, 2006. Check the license (Connecticut 035333, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Robert Y. Chang
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 035333 CT
Self-reported in NPPES; status is on the state search - Practice location
- 35 Elm Street, New Haven, CT 06510
- Phone
- (203) 789-0425
- Enumerated
- Nov 20, 2006
- Record last updated
- Mar 7, 2023
- Medicaid ID
- 00135333 CT
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 1,174 in Connecticut → Look up another NPI →
Verify Robert Y. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 035333Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average psychiatry physician in 2024
154 Medicare Part D claims for 11 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 12 claims were for opioids.
Most prescribed
- Buprenorphine-Naloxone48 claims
- Venlafaxine Hcl Er25 claims
- Zolpidem Tartrate21 claims
- Lorazepam13 claims
- Quetiapine Fumarate13 claims
- Oxycodone Hcl12 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.
Robert Y. Chang among 1,174 psychiatry physician records in Connecticut
Robert Y. Chang, MD is one of 1,174 psychiatry physician records with a practice address in Connecticut. 70% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 60% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2023 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
285 psychiatry physician records list a practice address in New Haven
They are 285 of the 9,793 NPPES records with a practice address in New Haven, and 1,174 psychiatry physician records in Connecticut.
All 1,174 in Connecticut → Every provider in New Haven → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Eric Berger, MDNew Haven, CT 065101407888746
- Joseph CheckNew Haven, CT 065101023121985
- Paul Desan, MDNew Haven, CT 065101689662686
- Tsilia Glinberg, MDNew Haven, CT 065101497736060
- David Greenfeld, M.D.New Haven, CT 065101851317366
- Frank Ninivaggi, MDNew Haven, CT 065101609880434
- Nancy Olson, M.D.New Haven, CT 065101003832049
- Anna Ostrovskaya, M. D.New Haven, CT 065101073556841
Common questions
What is Robert Y. Chang, MD's NPI number?
Robert Y. Chang, MD's National Provider Identifier (NPI) is 1801960190, issued on Nov 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Y. Chang, MD located?
The NPPES record lists a practice address at 35 Elm Street, New Haven, CT, 06510. Phone: (203) 789-0425. Providers update this record themselves, so call before visiting.
How can I verify Robert Y. Chang, MD's license?
NPPES lists Connecticut license number 035333, 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 Robert Y. Chang, MD prescribe under Medicare Part D?
In 2024, Robert Y. Chang, MD had 154 Medicare Part D claims for 11 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
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.