Doctor profile · Federal record
Dr. John Ioannou, M.D.
Nephrology Physician (CMS: Nephrology) · Rockville Centre, NY
- NPI 1851330328
- Accepts Medicare
- 25 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
242 Merrick RD, Suite 304
Rockville Centre, NY 115705254
(516) 764-7070
fax (516) 764-7073
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- October 30, 2009
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State license (1)
- New York #231998
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1851330328. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
4,706
Distinct HCPCS
10
Medicare allowed
$429,148
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 924 | 390 | $91 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 535 | 284 | $127 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 348 | 165 | $136 | |
36415 |
Insertion of needle into vein for collection of blood sample | 294 | 216 | $8 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 237 | 217 | $199 | |
99457 |
Management using the results of remote vital sign monitoring per calendar month, first 20 minutes | 214 | 26 | $56 | |
90960 |
Dialysis services, 4 or more physician visits per month (20 years or older) | 199 | 116 | $409 | |
80053 |
Blood test, comprehensive group of blood chemicals | 167 | 112 | $10 | |
99490 |
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 159 | 29 | $64 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 144 | 100 | $8 |
In context: peer comparison
Among 3 peers in Rockville Centre Nephrology Physician, average services per provider: 134. This provider delivers 35× the peer median.Open Payments
Industry payments received
All-time total
$1,211
Transactions
51
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Bayer Healthcare Pharmaceuticals INC. | 5 | $145.73 | |
| Ardelyx, INC. | 5 | $126.62 | |
| Calliditas Therapeutics US INC. | 5 | $111.21 | |
| Vifor Pharma, INC. | 4 | $98.27 | |
| AstraZeneca Pharmaceuticals Lp | 5 | $91.82 | |
| Mallinckrodt Hospital Products INC. | 3 | $81.03 | |
| Otsuka America Pharmaceutical, INC. | 4 | $78.49 | |
| Aurinia Pharma U.S., INC. | 3 | $69.11 | |
| Amgen INC. | 3 | $68.29 | |
| Travere Therapeutics, INC. | 5 | $61.79 | |
| Renalytix Ai, INC. | 2 | $48.78 | |
| Novo Nordisk INC | 2 | $47.88 | |
| Ani Pharmaceuticals, INC. | 2 | $47.46 | |
| Novartis Pharmaceuticals Corporation | 2 | $47.21 | |
| GlaxoSmithKline, LLC. | 1 | $26.36 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,108
Patients
388
Total drug cost
$135,851
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Losartan Potassium | Generic | 143 | 46 | $1,939 |
| Farxiga (Dapagliflozin Propanediol) | Brand | 126 | 32 | $117,471 |
| Amlodipine Besylate | Generic | 115 | 43 | $1,263 |
| Furosemide | Generic | 97 | 34 | $781 |
| Allopurinol | Generic | 93 | 33 | $1,189 |
| Chlorthalidone | Generic | 75 | 28 | $1,950 |
| Atorvastatin Calcium | Generic | 70 | 24 | $1,253 |
| Calcitriol | Generic | 65 | 25 | $1,211 |
| Valsartan | Generic | 55 | 20 | $2,047 |
| Carvedilol | Generic | 51 | 20 | $717 |
Hospital affiliations
Frequently asked questions
What is Dr. John Ioannou's medical specialty?
Dr. John Ioannou practices Nephrology Physician in Rockville Centre, NY.
Where does Dr. John Ioannou practice?
Dr. John Ioannou practices at 242 Merrick RD, Rockville Centre, NY 115705254. Office phone: 5167647070.
What is Dr. John Ioannou's NPI?
Dr. John Ioannou's National Provider Identifier (NPI) is 1851330328, issued by NPPES.
Does Dr. John Ioannou accept Medicare assignment?
Yes. Dr. John Ioannou accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Ioannou commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233). Source: CMS Medicare Physician & Other Practitioners file.