Browse Health
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. John Constantine is Below Average. Dr. Constantine has been reviewed by 8 patients who have provided 3 comments. The rating is 1.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.3
Promptness 1.4
Courteous Staff 2.3
Accurate Diagnosis 1.7
Bedside Manner 1.0
Spends Time with Me 1.4
Follows Up After Visit 2.1

Specialties & Research

Dr. John Constantine, MD is board certified in Ophthalmology.

  • He has special expertise in 1 area:
  • Lens Implants (Intraocular Lens Implantation)

Education & Awards

Dr. Constantine graduated from State University of New York at Buffalo. He has 2 awards.

Castle Connolly's Top Doctors™ (2012 - 2013)
Castle Connolly Top Doctors: Boston™ (2009)


Dr. Constantine has 5 hospital affiliations:

  • Lowell General Hospital 
  • Saints Memorial Medical Center Inc 


  • Spanish
  • Vietnamese
  • Yiddish
  • Italian
  • Greek
  • French
  • Hindi
  • English

> > > > Dr. John Constantine, MD

Similar doctors nearby

Dr. David Tracy

42 years experience
Chelmsford, MA

Dr. Vicki Chen

9 years experience
Chelmsford, MA

Dr. Murat Kalayoglu

11 years experience
Chelmsford, MA

Dr. David Perkins

43 years experience
Chelmsford, MA

Dr. Kailenn Tsao

17 years experience
Chelmsford, MA

Dr. Ann Burnham

27 years experience
Westford, MA
Search All Similar Doctors
Additional Information
Dr. John Boland Constantine MD is a male Ophthalmologist, has 45 years of experience and practices in Ophthalmology.
Where does Dr. John B. Constantine practice?
Dr. John Constantine has 4 office locations.
Dr. John Constantine practices Ophthalmology near Chelmsford, MA.
Additional practice locations include: Lowell, MA and Tewksbury, MA.
See Chelmsford Ophthalmologists.