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JOHN B CONSTANTINE M.D.
NPI 1437157765
Ophthalmology in Chelmsford, MA

Active since July 11, 2005
19 VILLAGE SQ, CHELMSFORD, MA 01824(978) 256-5600(978) 703-0250 Get Directions Write a Review

NPPES record last updated: September 29, 2011. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About John B Constantine M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN B CONSTANTINE M.D. (NPI 1437157765) is an individual ophthalmology provider in Chelmsford, Massachusetts, licensed in Massachusetts (71751) and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1437157765
Entity TypeIndividualMale
Primary Taxonomy207W00000X
Provider Legal NameJOHN B CONSTANTINECredential: M.D.
Location Address19 VILLAGE SQChelmsford, MA 01824-2712
Mailing Address19 Village SqChelmsford, MA 01824-2712 · (978) 256-5600 · Fax (978) 703-0250
Phone(978) 256-5600
Fax(978) 703-0250
Sole ProprietorNo
Enumeration DateJuly 11, 2005
Last NPPES UpdateSeptember 29, 2011
✔ NPI 1437157765 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in MA · 71751
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
Also ListedSpecialistTaxonomy 174400000X · License 71751 (MA)
19 VILLAGE SQ, Chelmsford, MA 01824
Open in Google Maps ↗

Other Identifiers 17

Other158296MA · Phcs
Other21879MA · Fallon
Other32774MA · John Hancock/childern
Medicare UPINB96966
Other15288MA · Harvard Pilgrim Health
OtherS000303MA · Champus
OtherP451314MA · Oxford Health
Other981909MA · Net Work Health
Other0800093MA · Ever Care
Other21480MA · Health Source
Medicare ID-Type UnspecifiedB26214MA · Ma Medicare
Other0004859MA · Neighborhood Health Plan
Other180007MA · Rail Road Medicare
Other7494MA · Davis Vision
OtherCIGNAMA · 20516
OtherB26214MA · Bc/bs Ma
Medicaid2024535MA

Other Providers at the Same Location NPPES 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DAVID HYUNGJUN YI MD
Ophthalmology
19 VILLAGE SQ
CHELMSFORD, MA 01824
Middlesex County (978) 256-5600
DAVID GEORGE PERKINS MD
Ophthalmology
19 VILLAGE SQ
CHELMSFORD, MA 01824
Middlesex County (978) 256-5600
DAVID MEARS TRACY MD
Ophthalmology
19 VILLAGE SQ
CHELMSFORD, MA 01824
Middlesex County (978) 256-5600
DR. CECILY ELAINE HAMILL MD, PHD
Ophthalmology
19 VILLAGE SQ
CHELMSFORD, MA 01824
Middlesex County (978) 256-5600
VIVIENNE THERESE KONG OD
Optometrist
19 VILLAGE SQ
CHELMSFORD, MA 01824
Middlesex County (978) 256-5600
DR. JENNIFER HARTZELL CALNAN OD
Optometrist (Pediatrics)
19 VILLAGE SQ
CHELMSFORD, MA 01824
Middlesex County (978) 703-0250
JENNA MICHELLE WILLARD O.D.
Optometrist
19 VILLAGE SQ
CHELMSFORD, MA 01824
Middlesex County (978) 256-5600
GLEN ALAN BOLLIGER MD
Ophthalmology
19 VILLAGE SQ
CHELMSFORD, MA 01824
Middlesex County (978) 256-5600

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Constantine's NPI number?

The NPI number for John Constantine is 1437157765. It was assigned to this individual provider in the NPPES registry on July 11, 2005.

Where is John Constantine located?

John Constantine practices at 19 Village Sq, Chelmsford, MA 01824. The listed phone number is (978) 256-5600.

What is John Constantine's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

When was this NPI record last updated?

The NPPES record for John Constantine was last updated on September 29, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.