John B Constantine

M.D. | Ophthalmologist

19 Village Sq, Chelmsford
Massachusetts, 01824-2712

978-256-5600 978-703-0250Maps & Directions

John B Constantine Details:

John B Constantine is a Chelmsford, Massachusetts based male Ophthalmologist who is specialized in Ophthalmology. Active license number of John B Constantine is 71751 for Ophthalmology in Massachusetts.
John B Constantine is 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, patients can be prescribed vision services, including glasses and contact lenses.

Complete Profile:

John B Constantine speciality, credentials, practice address, contact phone number and fax are as below. Patients can directly walk in or can call on the below given phone number for appointment.

Specialization:	Ophthalmology
Credentials:	M.D.
Gender:	Male
Practice Address:	19 Village Sq, Chelmsford, Massachusetts, 01824-2712
Phone:	978-256-5600
Fax:	978-703-0250

Professional Identification Codes:

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

NPI Number:	1437157765
NPI Enumeration Date:	11 Jul, 2005
NPI Last Update On:	29 Sep, 2011

Medical Licenses:

Doctors can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for John B Constantine are as mentioned below.

License Number	Specialization	State	Status
71751	Ophthalmology	Massachusetts	Primary
71751	Specialist	Massachusetts	Secondary

Other Medical Identifiers:

Other legacy medical identifiers associated with John B Constantine such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.

Identifier	Type	State	Issuer
981909	Other	Massachusetts	NET WORK HEALTH
158296	Other	Massachusetts	PHCS
21480	Other	Massachusetts	HEALTH SOURCE
7494	Other	Massachusetts	DAVIS VISION
0004859	Other	Massachusetts	NEIGHBORHOOD HEALTH PLAN
15288	Other	Massachusetts	HARVARD PILGRIM HEALTH
32774	Other	Massachusetts	JOHN HANCOCK/CHILDERN
P451314	Other	Massachusetts	OXFORD HEALTH
180007	Other	Massachusetts	RAIL ROAD MEDICARE
0800093	Other	Massachusetts	EVER CARE
21879	Other	Massachusetts	FALLON
B26214	Other	Massachusetts	BC/BS MA
CIGNA	Other	Massachusetts	20516
S000303	Other	Massachusetts	CHAMPUS
2024535	Medicaid	Massachusetts

Business Mailing Address:

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.

Address:	19 Village Sq, Chelmsford, Massachusetts
Zip:	01824-2712
Phone Number:	978-256-5600
Fax Number:	978-703-0250

Patients can reach John B Constantine at 19 Village Sq, Chelmsford, Massachusetts or can call to book an appointment on 978-256-5600.

Comments/ Reviews:

Patients can read all the reviews posted for John B Constantine below. You may also share your own experience like the quality of treatment, behavior, and overall care provided by John B Constantine. It will help others make informed decisions.

^** Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 08 December, 2025.

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