Doctor profile · Federal record
Dr. Iheanyichukwu Aja-Onu, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Freeport, NY
- NPI 1720077944
- Accepts Medicare
- MIPS 88.8 / 100 · 2023
- 30 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3 N Main St
Freeport, NY 115202218
(516) 623-5076
fax (516) 623-5076 - Mailing address
-
Po Box 37216
Elmont, NY 110037216
Credentials & registration
- NPI registered
- October 2005 — 21 yrs on file
- Profile last updated
- January 5, 2021
- Year of graduation
- 1996 — 30 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- New York #203413
- Medicaid
- NY #01956665
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1720077944. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
6,171
Distinct HCPCS
10
Medicare allowed
$674,290
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 4,652 | 577 | $91 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 764 | 617 | $150 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 275 | 147 | $148 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 137 | 131 | $117 | |
43246 |
Insertion of stomach tube using a flexible endoscope | 62 | 60 | $210 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 60 | 58 | $216 | |
99306 |
Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 56 | 48 | $197 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 44 | 44 | $297 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 41 | 41 | $195 | |
43264 |
Removal of stone or debris from bile or pancreatic duct using a flexible endoscope | 26 | 25 | $379 |
In context: peer comparison
Among 1 peers in Freeport Gastroenterology Physician, average services per provider: 440. This provider delivers 14× the peer median.Open Payments
Industry payments received
All-time total
$1,027
Transactions
45
Manufacturers
12
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 17 | $372.86 | |
| Phathom Pharmaceuticals, INC. | 10 | $228.75 | |
| Olympus America INC. | 3 | $79.14 | |
| Qol Medical, LLC | 3 | $64.63 | |
| Janssen Biotech, INC. | 3 | $59.25 | |
| Madrigal Pharmaceuticals | 2 | $51.92 | |
| Aimmune Therapeutics, INC. | 2 | $43.24 | |
| Celgene Corporation | 1 | $30.16 | |
| Erbe USA INC | 1 | $30.00 | |
| Ardelyx, INC. | 1 | $23.44 | |
| Ipsen Biopharmaceuticals, INC | 1 | $22.43 | |
| Intra-Sana Laboratories | 1 | $20.93 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
413
Patients
120
Total drug cost
$138,954
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 141 | 48 | $1,400 |
| Famotidine | Generic | 79 | 32 | $755 |
| Linzess (Linaclotide) | Brand | 62 | 14 | $38,749 |
| Pantoprazole Sodium | Generic | 44 | 15 | $415 |
| Ursodiol | Generic | 31 | 11 | $3,495 |
| Mirtazapine | Generic | 16 | 0 | $137 |
| Sulfasalazine | Generic | 16 | 0 | $326 |
| Humira(Cf) Pen (Adalimumab) | Brand | 12 | 0 | $93,259 |
| Procto-MED Hc (Hydrocortisone) | Brand | 12 | 0 | $419 |
Frequently asked questions
What is Dr. Iheanyichukwu Aja-Onu's medical specialty?
Dr. Iheanyichukwu Aja-Onu practices Gastroenterology Physician in Freeport, NY.
Where does Dr. Iheanyichukwu Aja-Onu practice?
Dr. Iheanyichukwu Aja-Onu practices at 3 N Main St, Freeport, NY 115202218. Office phone: 5166235076.
What is Dr. Iheanyichukwu Aja-Onu's NPI?
Dr. Iheanyichukwu Aja-Onu's National Provider Identifier (NPI) is 1720077944, issued by NPPES.
Does Dr. Iheanyichukwu Aja-Onu accept Medicare assignment?
Yes. Dr. Iheanyichukwu Aja-Onu accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Iheanyichukwu Aja-Onu commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.