Quick answers
- Which hospitals does John V. Chang work at?
- Medicare's official clinician data lists John V. Chang at 1 hospital: Merrimack Health Lawrence Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John V. Chang see patients?
- Medicare's clinician data lists 3 practice locations, including Methuen, MA and Lawrence, MA. Call before your visit to confirm the address.
- What is John V. Chang's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does John V. Chang accept Medicare assignment?
- Yes. Medicare's clinician data says John V. Chang accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John V. Chang?
- (978) 683-3491, as listed in official Medicare / NPI Registry data.
- What is John V. Chang's NPI number?
- 1679557326. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John V. Chang works
Medicare's Facility Affiliation Data lists John V. Chang at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Merrimack Health Lawrence HospitalLawrence, MA · Acute Care Hospital · CCN 220010
Practice locations
Addresses where John V. Chang is enrolled with Medicare (CMS data updated 2026-10-02).
- 147 Pelham StMethuen, MA 01844 (978) 683‑3491
- 150 Park StLawrence, MA 01841 (978) 685‑1770
- 34 Haverhill StLawrence, MA 01841 (978) 686‑0090
Group practices
Medicare enrollment lists John V. Chang as a member of this group (CMS data updated 2026-10-02).
- Greater Lawrence Family Health Center Inc122 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Methuen
Clinicians with the same Medicare primary specialty in Methuen, MA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | University Of New England, College Of Osteo Medicine |
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1679557326 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians