John V. Chang, D.O.
Emergency Medicine Physician · Lawrence, MA
John V. Chang, D.O. is an emergency medicine physician with a practice address in Lawrence, Massachusetts, and NPI 1679557326, issued on Dec 5, 2005. Check the license (Massachusetts 56184, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John V. Chang
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 56184 MA
Self-reported in NPPES; status is on the state search - Practice location
- 34 Haverhill St, Lawrence, MA 01841
- Phone
- (978) 686-0090
- Enumerated
- Dec 5, 2005
- Record last updated
- Sep 25, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (978) 681-5963
- Medicare enrollment
- Enrolled (PECOS I20060119000638); accepts Medicare assignment
- Medical or professional school
- University Of New England, College Of Osteo Medicine, 1984
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 34 Haverhill St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hanako Agresta, MDFamily Medicine Physician1477343747
- Jacqueline AguilarInfection Control Registered Nurse1902687312
- Yazienette AlcantaraDoula1386597581
- Romina Almada Gossweiler, MDFamily Medicine Physician1053000331
- Maria Alvelo, REGISTERED NURSERegistered Nurse1801400965
- Louise Amat, MDFamily Medicine Physician1598514564
Verify John V. 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 56184Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average emergency medicine physician in 2024
102 Medicare Part D claims for 38 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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: $68.80
2 payments; by number, the most common kind was food and beverage; the largest payer was Keystone Dental Inc. The 12,335 providers of this specialty with any payment received $953.79 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
- Greater Lawrence Family Health Center IncMethuen, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John V. Chang among 1,829 emergency medicine physician records in Massachusetts
John V. Chang, D.O. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1984 · median 2011 among the 1,200 with a school on file
- Record last updated2020 · 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).
38 emergency medicine physician records list a practice address in Lawrence
They are 38 of the 2,264 NPPES records with a practice address in Lawrence, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Lawrence → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Ylisabyth Bradshaw, D.O.Lawrence, MA 018411760466932
- Susan Browne, M.D.Lawrence, MA 018411821072091
- Tracy Ferguson, M.D.Lawrence, MA 018411871578716
- Michael Filbin, M.D.Lawrence, MA 018411205811148
- Franklin Friedman, M.D.Lawrence, MA 018411013992965
- Ricardo Gervasio, M.D.Lawrence, MA 018411780669598
- Michelle Harris, M.D.Lawrence, MA 018411831175520
- Kristen Hayes, M.D.Lawrence, MA 018411790760429
Common questions
What is John V. Chang, D.O.'s NPI number?
John V. Chang, D.O.'s National Provider Identifier (NPI) is 1679557326, issued on Dec 5, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John V. Chang, D.O. located?
The NPPES record lists a practice address at 34 Haverhill St, Lawrence, MA, 01841. Phone: (978) 686-0090. Providers update this record themselves, so call before visiting.
How can I verify John V. Chang, D.O.'s license?
NPPES lists Massachusetts license number 56184, 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 John V. Chang, D.O. prescribe under Medicare Part D?
In 2024, John V. Chang, D.O. had 102 Medicare Part D claims for 38 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.