Dr. Joseph L. Chang, MD
- Medicare services, 2024
- 484
- Medicare patients, 2024
- 486
- Part D claims, 2024
- 229
- MIPS score, 2024
- 100
- Hospital affiliations
- 1
- Practice address
- 41 Highland Avenue, Winchester, MA 01890
- Practice phone
- Call (781) 729-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chang's professional email, personal email and mobile number
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Dr. Joseph L. Chang is an emergency medicine physician in Winchester, Massachusetts
Dr. Chang practices at Winchester Hospital in Winchester, Massachusetts, part of Beth Israel Lahey Health.
Dr. Chang's NPI, 1518914274, was assigned on May 28, 2006. Dr. Chang graduated from University of Massachusetts Medical School in 1999. Dr. Chang holds Massachusetts license 217018.
- NPI
- 1518914274NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8123059268
- NPI enumeration date
- May 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (781) 729-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Joseph L. Chang practices at Winchester Hospital in Winchester, Massachusetts
Dr. Chang's primary practice is Winchester Hospital, at 41 Highland Avenue, Winchester, MA 01890 in Middlesex County. The practice phone is (781) 729-9000.
- Winchester Hospital41 Highland Avenue, Winchester, MA 01890 · Middlesex CountyPhone(781) 729-9000
Source: Dmand AI Affiliation Data
Dr. Joseph L. Chang is affiliated with 1 site of care and 3 medical groups
Dr. Chang's primary practice is Winchester Hospital in Winchester, Massachusetts, part of Beth Israel Lahey Health. The medical group on file is Beth Israel Lahey Health. Dmand AI also links Dr. Chang to 2 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Joseph L. Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Winchester Hospital | Available with a free account |
| +2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Beth Israel Lahey Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Joseph L. Chang is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Chang is licensed in Massachusetts.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
Emergency medicine physicians near Dr. Chang
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Joseph L. Chang billed Medicare for 484 services in 2024
CMS data shows 484 Medicare services from Dr. Chang across 7 procedure codes in 2024, for 486 Medicare patients. Medicare paid $55,184 for them.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5282024: 4848%
Where Dr. Chang's Medicare services took place, 2024
- In an office16835%
- In a facility31665%
Dr. Chang compared with the Massachusetts median for emergency medicine physicians, 2024
- Dr. Chang
- Massachusetts median
- Medicare services
- 484vs 34142% above
- Medicare patients
- 486vs 33744% above
- Part D claims
- 141vs 363.9 times
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chang and other emergency medicine physicians in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Joseph L. Chang treated 486 Medicare patients in 2024, average age 76
CMS counts 486 Medicare patients who saw Dr. Chang in 2024. The largest group is 75 to 84, with 180 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.48, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 56, with 56% women.
Dr. Chang's Medicare patients by age, 2024
Dr. Chang's Medicare patients by sex, 2024
- Women29060%
- Men19640%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol74%
- Arthritis54%
- Anxiety37%
- Chronic kidney disease35%
- Mood disorders34%
- Diabetes33%
- Ischemic heart disease33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Joseph L. Chang wrote 229 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 229 Medicare Part D claims for 180 patients. 95% of them were for generic drugs. CMS names the drug for 141 of them, across 7 drugs with 11 or more claims each, at $1,530 in total drug cost. In 2023, CMS named 137 claims across 7 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic217 claims95%
- Brand-name12 claims5%
Dr. Chang's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Chang's Part D claims, 2024
- Opioids12%28 of 229 claims
- Antibiotics60%138 of 229 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1372024: 1413%
Drugs named by CMS: 7 in 2024, 7 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Joseph L. Chang scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Chang for performance year 2024, reported as part of a group. Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Chang's MIPS scores, performance year 2024
- 100of 100Final score
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Joseph L. Chang received $130 in industry payments from 2020 to 2021
CMS Open Payments shows 2 general payments to Dr. Chang from 1 drug or device company from 2020 to 2021. Food and beverage make up the largest share, 100% of the total. Integra LifeSciences Corporation paid the most, $130.
General payments to Dr. Chang by program year, 2020 to 2021
Companies that paid Dr. Chang the most, 2020 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Joseph L. Chang graduated from University of Massachusetts Medical School
Dr. Chang graduated from University of Massachusetts Medical School in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Joseph L. Chang's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Joseph L. Chang
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Joseph L. Chang's NPI number?
Dr. Joseph L. Chang's NPI number is 1518914274. It was assigned on May 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Joseph L. Chang?
Dr. Joseph L. Chang is an emergency medicine physician in Winchester, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Joseph L. Chang practice?
Dr. Chang practices at 41 Highland Avenue, Winchester, MA 01890. Dr. Chang's primary practice is Winchester Hospital in Winchester, Massachusetts, part of Beth Israel Lahey Health. Dmand AI also links Dr. Chang to 2 medical groups.
What is Dr. Joseph L. Chang's office phone number?
The practice phone on file for Dr. Chang is (781) 729-9000.
What is Dr. Joseph L. Chang's medical license number?
Dr. Chang holds Massachusetts license 217018.
Which hospitals is Dr. Joseph L. Chang affiliated with?
Dr. Chang practices at Winchester Hospital in Winchester, Massachusetts.
What medical group is Dr. Joseph L. Chang part of?
Dr. Chang is linked to Beth Israel Lahey Health. Dmand AI links Dr. Chang to 2 more medical groups.
Does Dr. Joseph L. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 484 services in 2024, and Dr. Chang accepts Medicare assignment.
What is Dr. Joseph L. Chang's MIPS score?
Dr. Chang's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does Dr. Joseph L. Chang see?
CMS counts 486 Medicare patients who saw Dr. Chang in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Joseph L. Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were emergency department visit (99285), office visit, established patient (99213) and critical care (99291).
Where did Dr. Joseph L. Chang go to medical school?
Dr. Chang graduated from University of Massachusetts Medical School in 1999.
What drugs does Dr. Joseph L. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Cephalexin, Amoxicillin-Clavulanate Potass and Azithromycin.
Has Dr. Joseph L. Chang received payments from drug or device companies?
CMS Open Payments shows $130 in general payments to Dr. Chang from 1 company from 2020 to 2021. The largest total came from Integra LifeSciences Corporation.
How long has Dr. Joseph L. Chang been practicing?
Dr. Chang graduated from medical school in 1999, 27 years ago.
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