Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Joann Cong Yin Chang, MD

Individual provider Ophthalmology Physician · NPI 1730359100

Dr. Joann Cong Yin Chang, MD is an Ophthalmology in Lancaster, Massachusetts. Graduated from University of Cincinnati College of Medicine in 2004, 22 years ago. Practices with D'Ambrosio Eye Care Inc, an 11-clinician group and accepts Medicare assignment. Licensed in Massachusetts and New York.

Years since qualifying
22
Trained at
University of Cincinnati College of Medicine
Licensed in
MA, NY
In the registry since
2008
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

479 Old Union Tpke
Lancaster, MA 01523-3029
Phone: (978) 537-3900
Fax: (978) 537-6030
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence 243192 (MA)
Ophthalmology Physician Taxonomy 207W00000X · Licence 267568 (NY)

Record details

NPI number1730359100
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 2, 2008
Last updated in NPPESMay 2, 2022
Certification dateMay 2, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPHTHALMOLOGY
Medical schoolUNIVERSITY OF CINCINNATI COLLEGE OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice D'Ambrosio Eye Care Inc — 11 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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