JOHN B CONSTANTINE (M.D.) – Ophthalmology Physician, NPI 1437157765

JOHN B CONSTANTINE (M.D.) is a healthcare provider. based in Chelmsford, Massachusetts. specializing in Ophthalmology Physician. They hold the professional credentials M.D.. They hold a License No. 71751 (MA). The NPI Number for JOHN B CONSTANTINE (M.D.) is 1437157765

Main info

Male
Name
JOHN B CONSTANTINE (M.D.)
NPI
1437157765
Phone
(978) 256-5600
Address
19 VILLAGE SQ
Enumeration Date
11 July 2005
Last Update Date
29 September 2011
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience59
Completeness75
Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for JOHN B CONSTANTINE (M.D.)

  • 13;15;17;19;21;23, Village Square, Chelmsford, Middlesex County, Massachusetts, 01824, United States

    CHELMSFORD, MA 018242712

    Phone: (978) 256-5600

    Fax: (978) 703-0250

    Mailing address matches the actual address.

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

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Medicare Enrollment & Revalidation

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Medicare Utilization (FFS)

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No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 01824)

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Provider's Procedures

JOHN B CONSTANTINE (M.D.) performs procedures in Ophthalmology Physician. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
OPHTHALMOLOGYMA92012Eye and medical examination for diagnosis and treatment, established patient778552
OPHTHALMOLOGYMA92083Measurement of field of vision during daylight conditions197192
OPHTHALMOLOGYMA92134Diagnostic imaging of retina2524

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Frequently asked questions

What is JOHN B CONSTANTINE (M.D.)'s NPI number?
JOHN B CONSTANTINE (M.D.)'s NPI is 1437157765 — the number used across U.S. healthcare to identify this provider.
Is JOHN B CONSTANTINE (M.D.) shown as active in public data?
Registry records indicate JOHN B CONSTANTINE (M.D.) maintains an active NPI.
What kind of doctor is JOHN B CONSTANTINE (M.D.)?
JOHN B CONSTANTINE (M.D.) is associated with Ophthalmology Physician in the directory — Clinical services aligned with this taxonomy classification.
Where in Massachusetts is JOHN B CONSTANTINE (M.D.) registered?
Use Chelmsford, Massachusetts as the headline location for JOHN B CONSTANTINE (M.D.) here.
When was this NPI issued?
Enumeration for JOHN B CONSTANTINE (M.D.) is noted as July 11, 2005 where the registry provides it.

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