Joseph L. Chang, M.D.
Emergency Medicine Physician · Winchester, MA
Joseph L. Chang, M.D. is an emergency medicine physician with a practice address in Winchester, Massachusetts, and NPI 1518914274, issued on May 28, 2006. Check the license (Massachusetts 217018, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Joseph L. Chang
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 217018 MA
Self-reported in NPPES; status is on the state search - Practice location
- 41 Highland Ave, Winchester, MA 01890
- Phone
- (781) 729-9000
- Enumerated
- May 28, 2006
- Record last updated
- Mar 23, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050829000210); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 1999
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 41 Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- May Azar, M.D.Cytopathology Physician1114916731
- Karen Beaton, MDAnesthesiology Physician1780652065
- Eve BishopAnesthesiology Physician1619482288
Verify Joseph L. 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 217018Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% more Medicare Part D claims than the average emergency medicine physician in 2024
229 Medicare Part D claims for 180 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 28 claims were for opioids.
Most prescribed
- Cephalexin38 claims
- Amoxicillin-Clavulanate Potass21 claims
- Azithromycin20 claims
- Doxycycline Hyclate19 claims
- Cefpodoxime Proxetil17 claims
- Tramadol Hcl14 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 MIPS final score for 2023 (Medicare payment program): 91.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Beth Israel Lahey Health Specialty Care, Inc.Burlington, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph L. Chang among 1,829 emergency medicine physician records in Massachusetts
Joseph L. Chang, M.D. is one of 1,829 emergency medicine physician records with a practice address in Massachusetts. 82% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1999 · median 2011 among the 1,200 with a school on file
- Record last updated2017 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 emergency medicine physician records list a practice address in Winchester
They are 15 of the 439 NPPES records with a practice address in Winchester, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Winchester → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Donald Amiralian, M.D.Winchester, MA 018901962447078
- Teriggi Ciccone, M.D.Winchester, MA 018901376554584
- Samuel Gross, MDWinchester, MA 018901720235120
- Shahrouz Hekmatpour, M.D.Winchester, MA 018901427075951
- Edwin Hernandez, M.D.Winchester, MA 018901699796037
- Marisa Kearney, M.D.Winchester, MA 018901952346710
- Michael Kim, M.D.Winchester, MA 018901710908140
- Calvin Lee, M.D.Winchester, MA 018901174728737
Common questions
What is Joseph L. Chang, M.D.'s NPI number?
Joseph L. Chang, M.D.'s National Provider Identifier (NPI) is 1518914274, issued on May 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph L. Chang, M.D. located?
The NPPES record lists a practice address at 41 Highland Ave, Winchester, MA, 01890. Phone: (781) 729-9000. Providers update this record themselves, so call before visiting.
How can I verify Joseph L. Chang, M.D.'s license?
NPPES lists Massachusetts license number 217018, 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 Joseph L. Chang, M.D. prescribe under Medicare Part D?
In 2024, Joseph L. Chang, M.D. had 229 Medicare Part D claims for 180 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Joseph L. Chang, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.4 of 100. 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.