John Chang, D.O.

Family Medicine

GenderMaleNPI1679557326Affiliated sites3

Affiliated Health Centers

John Chang is affiliated with 3 federally qualified health center locations.

GREATER LAWRENCE FAMILY HEALTH

34 Haverhill St, Lawrence, MA 01841-2884

View clinic →

Haverhill Family Health Center

755 Main Street, Haverhill, MA 01830-2166

View clinic →

Community Action Drop-In Center

16 Ashland St, Haverhill, MA 01830-4129

View clinic →

Primary Care Services

Preventive care, chronic disease management, and routine health services for all ages.

Annual physicals

Chronic disease management

Immunizations

Preventive screenings

Acute illness care

Hypertension & diabetes management

Referral coordination

Browse all Primary Care clinics →

Clinician information is sourced from the NPPES National Provider Registry (February 2026) and reflects self-reported practice locations. Individual providers may have joined or left since the last registry update.

Verify on NPI Registry

Confirm current license and practice information on the official CMS NPI registry.

View NPI Record

Family Medicine

Providing family medicine services at federally qualified health centers with sliding fee scale options.

View services →

Browse

All clinicians →Family Medicine clinicians →Browse health centers →

John Chang, D.O.

Affiliated Health Centers

Primary Care Services

Related Clinicians

Other Clinicians at These Health Centers

Other Family Medicine Clinicians

Verify on NPI Registry

Family Medicine

Browse