Dr. John W. Chang, MD
- Medicare services, 2019
- 22
- Medicare patients, 2024
- 14
- Part D claims, 2024
- 45
- Industry payments
- $13,680
- Affiliated sites
- 1
- Practice address
- 1201 S Collegeville Rd, Collegeville, PA 19426
- Practice phone
- Call (248) 860-0031
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Quest Diagnostics Clinical Laboratories Inc
Collegeville, Pennsylvania
Find Dr. Chang's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John W. Chang is a general surgeon in Collegeville, Pennsylvania
Dr. Chang practices at Quest Diagnostics Clinical Laboratories Inc in Collegeville, Pennsylvania.
Dr. Chang's NPI, 1720057052, was assigned on March 17, 2006. Dr. Chang graduated from Feinberg School of Medicine in 1997. Dr. Chang holds Florida license ME85914.
- NPI
- 1720057052NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5294700142
- NPI enumeration date
- March 17, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (248) 860-0031
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John W. Chang practices at Quest Diagnostics Clinical Laboratories Inc in Collegeville, Pennsylvania
Dr. Chang's primary practice is Quest Diagnostics Clinical Laboratories Inc, at 1201 S Collegeville Rd, Collegeville, PA 19426 in Montgomery County. The practice phone is (248) 860-0031.
- Quest Diagnostics Clinical Laboratories Inc1201 S Collegeville Rd, Collegeville, PA 19426 · Montgomery CountyPhone(248) 860-0031
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John W. Chang is affiliated with 2 sites of care
Dr. Chang's primary practice is Quest Diagnostics Clinical Laboratories Inc in Collegeville, Pennsylvania. Dmand AI also links Dr. Chang to 1 physician office, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John W. 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 |
|---|---|
| Quest Diagnostics Clinical Laboratories Inc | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John W. Chang is one of 1,398 general surgeons in Pennsylvania
Surgery is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Chang is licensed in Florida.
Specialties and state licenses
- Surgery, FloridaPrimary
Clinical focus
Dmand AI lists varicose vein treatment among the conditions Dr. Chang treats.
General surgeons near Dr. Chang
Counts of general surgeons 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. John W. Chang billed Medicare for 22 services in 2019
CMS data shows 22 Medicare services from Dr. Chang across 2 procedure codes in 2019, for 14 Medicare patients. Medicare paid $2,728 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Tests and treatments
- 2018: 02019: 11
- Office and hospital visits
- 2018: 02019: 11
- Imaging
- 2018: 302019: 0100%
- Surgery
- 2018: 302019: 0100%
Dr. Chang compared with the Pennsylvania median for general surgeons, 2019
- Dr. Chang
- Pennsylvania median
- Medicare services
- 22vs 15886% below
- Medicare patients
- 14vs 12789% below
- Part D claims
- 25vs 2914% below
Medians across 1,213 general surgeons in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Chang?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chang and other general surgeons in Pennsylvania.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John W. Chang treated 14 Medicare patients in 2024, average age 72
CMS counts 14 Medicare patients who saw Dr. Chang in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 0.96, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 53, with 80% women.
Dr. Chang's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
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 53
Patient panel by sex, all payers
- Women80%
- Men19%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John W. Chang wrote 45 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 45 Medicare Part D claims for 20 patients. 73% of them were for generic drugs. CMS names the drug for 25 of them, across 2 drugs with 11 or more claims each, at $2,923 in total drug cost. In 2023, CMS named 27 claims across 2 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic33 claims73%
- Brand-name12 claims27%
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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 272024: 257%
Drugs named by CMS: 2 in 2024, 2 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. John W. Chang ranks in the 83rd percentile for varicose vein removal in Medicare
Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 96 procedures of varicose vein removal by Dr. Chang, more than 83% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Chang ranks in Medicare procedure volume
- Varicose vein removal
- 83rd percentile96 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John W. Chang received $13,680 in industry payments from 2022 to 2025
CMS Open Payments shows 23 general payments to Dr. Chang from 9 drug and device companies from 2022 to 2025. Device or supply loans make up the largest share, 96% of the total. C. R. Bard, Inc. & Subsidiaries paid the most, $9,917.
General payments to Dr. Chang by program year, 2022 to 2025
General payments to Dr. Chang by kind, 2022 to 2025
- Device or supply loans$13,18096%
- Food and beverage$5004%
Companies that paid Dr. Chang the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John W. Chang has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chang.
Awards and honors for Dr. Chang
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. John W. Chang graduated from Feinberg School of Medicine
Dr. Chang graduated from Feinberg School of Medicine in 1997. Dr. Chang is a member of AACS, ACP, ACS, AMA and American Society of Liposuction Surgeons.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. John W. Chang accepts plans from 16 insurance carriers
Dr. Chang is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- +8 more carriersWith a free account
Plan types Dr. Chang accepts, by number of carriers
- PPO11
- Medicare9
- HMO8
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. John W. 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. John W. 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. John W. Chang's NPI number?
Dr. John W. Chang's NPI number is 1720057052. It was assigned on March 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John W. Chang?
Dr. John W. Chang is a general surgeon in Collegeville, Pennsylvania. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John W. Chang practice?
Dr. Chang practices at 1201 S Collegeville Rd, Collegeville, PA 19426. Dr. Chang's primary practice is Quest Diagnostics Clinical Laboratories Inc in Collegeville, Pennsylvania. Dmand AI also links Dr. Chang to 1 physician office.
What is Dr. John W. Chang's office phone number?
The practice phone on file for Dr. Chang is (248) 860-0031.
What is Dr. John W. Chang's medical license number?
Dr. Chang holds Florida license ME85914.
Does Dr. John W. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 22 services in 2019, and Dr. Chang accepts Medicare assignment.
How many Medicare patients does Dr. John W. Chang see?
CMS counts 14 Medicare patients who saw Dr. Chang in 2024, with an average age of 72.
What services does Dr. John W. Chang bill to Medicare?
In 2019, Dr. Chang's most billed Medicare services were blood vessel study (93970) and office visit, new patient (99203).
Where did Dr. John W. Chang go to medical school?
Dr. Chang graduated from Feinberg School of Medicine in 1997.
What drugs does Dr. John W. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Ibuprofen and Symbicort.
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Has Dr. John W. Chang received payments from drug or device companies?
CMS Open Payments shows $13,680 in general payments to Dr. Chang from 9 companies from 2022 to 2025. The largest total came from C. R. Bard, Inc. & Subsidiaries.
How long has Dr. John W. Chang been practicing?
Dr. Chang graduated from medical school in 1997, 29 years ago.
What insurance does Dr. John W. Chang accept?
Dr. Chang is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
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