Michael A. Chang, M.D.
Ophthalmology Physician · Lexington, MA
Michael A. Chang, M.D. is an ophthalmology physician with a practice address in Lexington, Massachusetts, and NPI 1366438624, issued on Sep 22, 2005. Check the license (Massachusetts 59606, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Michael A. Chang
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 59606 MA
Self-reported in NPPES; status is on the state search - Practice location
- 110 Hartwell Ave Ste 201, Lexington, MA 02421
- Phone
- (781) 890-1023
- Enumerated
- Sep 22, 2005
- Record last updated
- Aug 14, 2023
- Medicare enrollment
- Enrolled (PECOS I20050407000363); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 1984
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 791 in Massachusetts → Look up another NPI →
Verify Michael A. 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 59606Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% more Medicare Part D claims than the average ophthalmology physician in 2024
2,265 Medicare Part D claims for 611 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims.
Most prescribed
- Timolol Maleate510 claims
- Latanoprost310 claims
- Erythromycin236 claims
- Lumigan204 claims
- Brimonidine Tartrate137 claims
- Dorzolamide-Timolol84 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.
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).
Michael A. Chang among 791 ophthalmology physician records in Massachusetts
Michael A. Chang, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 77% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1984 · median 2002 among the 518 with a school on file
- Record last updated2023 · 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).
18 ophthalmology physician records list a practice address in Lexington
They are 18 of the 1,467 NPPES records with a practice address in Lexington, and 791 ophthalmology physician records in Massachusetts.
All 791 in Massachusetts → Every provider in Lexington → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Ann Burnham, M.D.Lexington, MA 024211255481065
- Nina Farivari, M.D.Lexington, MA 024211730576604
- Jeremy Kieval, M.D.Lexington, MA 024211457537136
- Harvey Lewis, M.D.Lexington, MA 024211447290978
- Olivia Liao, MDLexington, MA 024211174502454
- Li-Wei Lin, M.D.Lexington, MA 024211295781904
- O'Ine McCabe, M.D.Lexington, MA 024211689611634
- Deborah McCoy, M.D.Lexington, MA 024211336144419
Common questions
What is Michael A. Chang, M.D.'s NPI number?
Michael A. Chang, M.D.'s National Provider Identifier (NPI) is 1366438624, issued on Sep 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Michael A. Chang, M.D. located?
The NPPES record lists a practice address at 110 Hartwell Ave Ste 201, Lexington, MA, 02421. Phone: (781) 890-1023. Providers update this record themselves, so call before visiting.
How can I verify Michael A. Chang, M.D.'s license?
NPPES lists Massachusetts license number 59606, 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 Michael A. Chang, M.D. prescribe under Medicare Part D?
In 2024, Michael A. Chang, M.D. had 2,265 Medicare Part D claims for 611 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.