John Michael Ioannou, M.D.
John Ioannou, M.D. has practiced internal medicine for 25+ years, working in group practice. Trained at Icahn School of Medicine at Mount Sinai (class of 2001), he has been practicing for over 25 years. Nephrologists treat kidney diseases including chronic kidney disease, kidney failure requiring dialysis, and more.
Data updated 2009-10-30 on CMS NPPES
Contact & Location
Practice Location
242 Merrick Rd Suite 304, Rockville Centre, NY 11570-5254
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Nephrologists treat kidney diseases including chronic kidney disease, kidney failure requiring dialysis, glomerulonephritis, kidney stones, and electrolyte disorders. They manage dialysis access and kidney transplant follow-up.
Taxonomy: 207RN0300X
Education & Training
Icahn School of Medicine at Mount Sinai (Class of 2001)
Virtual Internal Medicine Care With John Ioannou
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with John Ioannou for follow-ups, medication reviews, and ongoing care — no travel to Rockville Centre required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes.
Frequently Asked Questions
Common questions about John Ioannou
NPI records show Dr. Ioannou as active with telehealth listed in Rockville Centre, NY. Note: NPI status alone doesn't confirm open availability — always call ahead. Phone: (516) 764-7070.
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Contact John Ioannou
Practice Location
242 Merrick Rd Suite 304, Rockville Centre, NY 11570-5254
This is a provider directory. Contact the office directly to schedule appointments.
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