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

John Michael Ioannou, MD

Individual provider Nephrology Physician · NPI 1851330328

John Michael Ioannou, MD practises Nephrology in Rockville Centre, New York. Graduated from Icahn School of Medicine at Mount Sinai in 2001, 25 years ago. Practices with Prine Health Medical Group, PLLC, a 75-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
25
Trained at
Icahn School of Medicine at Mount Sinai
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

242 Merrick Rd Ste 304
Rockville Centre, NY 11570-5254 Not confirmed with CMS for 16 years — call before visiting
Phone: (516) 764-7070
Fax: (516) 764-7073
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 231998 (NY)

Record details

NPI number1851330328
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 6, 2006
Last updated in NPPESOctober 30, 2009

Medicare enrollment

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

Medicare specialtyNEPHROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
Graduated 2001 (25 years in practice)
Group practice Prine Health Medical Group, Pllc — 75 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients931
Services billed 7,241 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Also affiliated with 1 inpatient rehabilitation facility, which CMS identifies by certification number only.

Colleagues at Prine Health Medical Group, PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 75 clinicians in the practice; 12 are shown here.

Other providers in Rockville Centre