Han-Ying Chang
Ophthalmology Physician · Boston, MA
Han-Ying Chang is an ophthalmology physician with a practice address in Boston, Massachusetts, and NPI 1184882870, issued on May 29, 2008. Check the license (Massachusetts 250406, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Han-Ying Chang
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 250406 MA
Self-reported in NPPES; status is on the state search - Practice location
- 243 Charles St, Boston, MA 02114
- Phone
- (617) 523-7900
- Enumerated
- May 29, 2008
- Record last updated
- Oct 24, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20120810000312); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 2008
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 791 in Massachusetts → Look up another NPI →
Also registered at 243 Charles St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Dunia Abdul-Aziz, MDOtolaryngology Physician1487880985
- Hasan Abdulbaki, MDStudent in an Organized Health Care Education/Training Program1811790512
- Inas Aboobakar, M.D.Ophthalmology Physician1760846265
- Jihad Achkar, M.D.Otolaryngology Physician1811203763
- Alessandro Adad Jammal, MD, PHDOphthalmology Physician1518725480
Verify Han-Ying Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 250406Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average ophthalmology physician in 2024
613 Medicare Part D claims for 149 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Prednisolone Acetate129 claims
- Ketorolac Tromethamine83 claims
- Latanoprost82 claims
- Moxifloxacin76 claims
- Neomycin-Polymyxin-Dexameth59 claims
- Restasis42 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.
Industry payments in 2024: $13.88
1 payment: food and beverage; the largest payer was Ocular Therapeutix, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Massachusetts Eye And Ear Associates, IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Han-Ying Chang among 791 ophthalmology physician records in Massachusetts
Han-Ying Chang is one of 791 ophthalmology physician records with a practice address in Massachusetts. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 60% of them.
- NPI issued2008 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2008 · median 2002 among the 518 with a school on file
- Record last updated2012 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Massachusetts
There are 791 ophthalmology physician records in Massachusetts.
All 791 in Massachusetts → Every provider in Boston → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Sandra Cremers, MDBoston, MA 021141588654040
- Thaddeus Dryja, MDBoston, MA 021141619961968
- Suzanne Freitag, MDBoston, MA 021141710974464
- Matthew Gardiner, MDBoston, MA 021141366432833
- Deeba Husain, MDBoston, MA 021141952397697
- Ula Jurkunas, MDBoston, MA 021141386634699
- Ivana Kim, M.D.Boston, MA 021141851381933
- Peter Lou, MDBoston, MA 021141316937709
Common questions
What is Han-Ying Chang's NPI number?
Han-Ying Chang's National Provider Identifier (NPI) is 1184882870, issued on May 29, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Han-Ying Chang located?
The NPPES record lists a practice address at 243 Charles St, Boston, MA, 02114. Phone: (617) 523-7900. Providers update this record themselves, so call before visiting.
How can I verify Han-Ying Chang's license?
NPPES lists Massachusetts license number 250406, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Han-Ying Chang prescribe under Medicare Part D?
In 2024, Han-Ying Chang had 613 Medicare Part D claims for 149 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.