Dr. John Michael Ioannou, MD
- Medicare services, 2024
- 5,717
- Medicare patients, 2024
- 931
- Part D claims, 2024
- 2,573
- Publications
- 1
- Hospital affiliations
- 4
- Practice address
- 1165 Northern Blvd, Manhasset, NY 11030
- Practice phone
- Call (516) 623-1786
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Freeport Kidney Center
Manhasset, New York
Find Dr. Ioannou's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John Michael Ioannou is a nephrologist in Manhasset, New York
Dr. Ioannou practices at Freeport Kidney Center in Manhasset, New York.
Dr. Ioannou's NPI, 1851330328, was assigned on June 6, 2006. Dr. Ioannou graduated from Icahn School Of Medicine At Mount Sinai in 2001. Dr. Ioannou holds New York license 231998.
- NPI
- 1851330328NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1658383104
- NPI enumeration date
- June 6, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (516) 623-1786
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Michael Ioannou practices at Freeport Kidney Center in Manhasset, New York
Dr. Ioannou's primary practice is Freeport Kidney Center, at 1165 Northern Blvd, Manhasset, NY 11030 in Nassau County. The practice phone is (516) 623-1786.
- Freeport Kidney Center1165 Northern Blvd, Manhasset, NY 11030 · Nassau CountyPhone(516) 623-1786
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Michael Ioannou is affiliated with 12 sites of care and 2 medical groups
Dr. Ioannou's primary practice is Freeport Kidney Center in Manhasset, New York. Dr. Ioannou is also affiliated with Mount Sinai South Nassau. The medical group on file is PRINE Health. Dmand AI also links Dr. Ioannou to 3 more hospitals, 5 dialysis centers, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Michael Ioannou's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ioannou practices, 11 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Freeport Kidney Center | Available with a free account |
| +11 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Michael Ioannou is one of 914 nephrologists in New York
Nephrology is Dr. Ioannou's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Ioannou is board certified in internal medicine by the American Board of Internal Medicine. Dr. Ioannou is licensed in New York.
Specialties and state licenses
- Nephrology, New YorkPrimary
Clinical focus
Dmand AI lists acute kidney failure, chronic anemia, chronic kidney disease, fluid and electrolyte imbalances and hypercalcemia among the conditions Dr. Ioannou treats.
Nephrologists near Dr. Ioannou
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Michael Ioannou billed Medicare for 5,717 services in 2024
CMS data shows 5,717 Medicare services from Dr. Ioannou across 42 procedure codes in 2024, for 931 Medicare patients. Medicare paid $350,248 for them.
Dr. Ioannou's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2,6072024: 2,96514%
- Lab and pathology
- 2023: 1,2822024: 1,90348%
- Tests and treatments
- 2023: 5072024: 43115%
- Surgery
- 2023: 2942024: 3209%
- Other services
- 2023: 162024: 98513%
Where Dr. Ioannou's Medicare services took place, 2024
- In an office4,30875%
- In a facility1,40925%
Dr. Ioannou compared with the New York median for nephrologists, 2024
- Dr. Ioannou
- New York median
- Medicare services
- 5,717vs 6898.3 times
- Medicare patients
- 931vs 2174.3 times
- Part D claims
- 2,105vs 4364.8 times
Medians across 892 nephrologists in New York with Dmand AI profiles that report each measure.
Dr. Ioannou's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Ioannou?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ioannou and other nephrologists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Michael Ioannou treated 931 Medicare patients in 2024, average age 76
CMS counts 931 Medicare patients who saw Dr. Ioannou in 2024. The largest group is 75 to 84, with 358 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 28% are also on Medicaid. Their average risk score is 3.50, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Ioannou's median patient age at 68, with 45% women.
Dr. Ioannou's Medicare patients by age, 2024
Dr. Ioannou's Medicare patients by sex, 2024
- Women39943%
- Men53257%
Chronic conditions among Dr. Ioannou's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes68%
- Ischemic heart disease57%
- Arthritis51%
- Heart failure46%
- Atrial fibrillation33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ioannou's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women45%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Michael Ioannou wrote 2,573 Medicare Part D claims in 2024
In 2024, Dr. Ioannou wrote 2,573 Medicare Part D claims for 459 patients. 82% of them were for generic drugs. CMS names the drug for 2,105 of them, across 57 drugs with 11 or more claims each, at $405,290 in total drug cost. In 2023, CMS named 1,788 claims across 50 drugs.
Dr. Ioannou's Part D claims by kind of drug, 2024
- Generic2,120 claims82%
- Brand-name and other453 claims18%
Dr. Ioannou's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ioannou's Part D claims, 2024
- Opioids1%24 of 2,573 claims
- Antibiotics1%31 of 2,573 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,7882024: 2,10518%
Drugs named by CMS: 57 in 2024, 50 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. John Michael Ioannou offers telehealth to Medicare patients
Dr. Ioannou accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ioannou as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. John Michael Ioannou has 1 publication on record
Dmand AI links 1 paper to Dr. Ioannou.
Recent publications by Dr. Ioannou
See who Dr. Ioannou researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ioannou works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Michael Ioannou received $9,094 in industry payments from 2016 to 2025
CMS Open Payments shows 437 general payments to Dr. Ioannou from 39 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $1,164.
General payments to Dr. Ioannou by program year, 2016 to 2025
General payments to Dr. Ioannou by kind, 2016 to 2025
- Food and beverage$8,95498%
- Education$1402%
Companies that paid Dr. Ioannou the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Michael Ioannou has 1 award and honors on record
Dmand AI lists 1 award for Dr. Ioannou, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Ioannou
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. John Michael Ioannou graduated from Icahn School Of Medicine At Mount Sinai
Dr. Ioannou graduated from Icahn School Of Medicine At Mount Sinai in 2001. Dr. Ioannou is a member of ACP.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. John Michael Ioannou accepts plans from 16 insurance carriers
Dr. Ioannou is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- Cigna
- Elevance
- +8 more carriersWith a free account
Plan types Dr. Ioannou accepts, by number of carriers
- PPO11
- Medicare9
- HMO7
- POS4
- EPO3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Michael Ioannou's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Michael Ioannou
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John Michael Ioannou's NPI number?
Dr. John Michael Ioannou's NPI number is 1851330328. It was assigned on June 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Michael Ioannou?
Dr. John Michael Ioannou is a nephrologist in Manhasset, New York. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. John Michael Ioannou practice?
Dr. Ioannou practices at 1165 Northern Blvd, Manhasset, NY 11030. Dr. Ioannou's primary practice is Freeport Kidney Center in Manhasset, New York. Dmand AI also links Dr. Ioannou to 3 hospitals, 5 dialysis centers, 2 group practices and clinics and 1 medical group.
What is Dr. John Michael Ioannou's office phone number?
The practice phone on file for Dr. Ioannou is (516) 623-1786.
What is Dr. John Michael Ioannou's medical license number?
Dr. Ioannou holds New York license 231998.
Which hospitals is Dr. John Michael Ioannou affiliated with?
Dr. Ioannou is affiliated with Mount Sinai South Nassau. Dmand AI links Dr. Ioannou to 3 more hospitals.
What medical group is Dr. John Michael Ioannou part of?
Dr. Ioannou is linked to PRINE Health. Dmand AI links Dr. Ioannou to 1 more medical group.
Does Dr. John Michael Ioannou accept Medicare?
Yes. CMS data shows Dr. Ioannou billed Medicare for 5,717 services in 2024, and Dr. Ioannou accepts Medicare assignment.
Does Dr. John Michael Ioannou offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ioannou as offering telehealth services.
How many Medicare patients does Dr. John Michael Ioannou see?
CMS counts 931 Medicare patients who saw Dr. Ioannou in 2024, with an average age of 76.
Show 8 more questionsShow fewer questions
Is Dr. John Michael Ioannou board certified?
Yes. Dr. Ioannou is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. John Michael Ioannou bill to Medicare?
In 2024, Dr. Ioannou's most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99214) and care management and other visits (99490).
Where did Dr. John Michael Ioannou go to medical school?
Dr. Ioannou graduated from Icahn School Of Medicine At Mount Sinai in 2001.
What drugs does Dr. John Michael Ioannou prescribe most?
In 2024 Medicare Part D data, Dr. Ioannou's most prescribed drugs by claims were Farxiga, Losartan Potassium and Amlodipine Besylate.
Has Dr. John Michael Ioannou received payments from drug or device companies?
CMS Open Payments shows $9,094 in general payments to Dr. Ioannou from 39 companies from 2016 to 2025. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. John Michael Ioannou been practicing?
Dr. Ioannou graduated from medical school in 2001, 25 years ago.
Does Dr. John Michael Ioannou do research?
Dmand AI links 1 publication to Dr. Ioannou.
What insurance does Dr. John Michael Ioannou accept?
Dr. Ioannou is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
Selling to nephrology practices?
See nephrologists in New York by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card