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

Individual provider Psychiatry Physician · NPI 1124124003

Dr. Constantine Ioannou, MD is a Psychiatry in East Meadow, New York. Qualified in 1985, 41 years ago. Practices with Nassau Health Care Corporation, a 181-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
41
Licensed in
NY
In the registry since
2006
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

2201 Hempstead Tpke Nassau University Medical Ctr
East Meadow, NY 11554-1859
Phone: (516) 572-6511
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 180863 (NY)

Record details

NPI number1124124003
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 16, 2006
Last updated in NPPESMay 28, 2014

Medicare enrollment

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

Medicare specialtyPSYCHIATRY
Medical schoolOTHER
Graduated 1985 (41 years in practice)
Group practice Nassau Health Care Corporation — 181 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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