Iheanyichukwu Aja-Onu, M.D.
NPI 1720077944 · Gastroenterology Physician · Freeport, NY
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Iheanyichukwu Aja-Onu, M.D. is a Gastroenterology Physician provider in Freeport, NY (NPI 1720077944).
Provider details
- NPI number
- 1720077944
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 203413 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
6,985 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 5,406 | $91 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 854 | $152 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 264 | $152 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 142 | $121 |
| Insertion of Stomach Tube Using a Flexible Endoscope43246 | 70 | $179 |
| Diagnostic Exam of Large Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 123 | 39 |
| Omeprazole | 121 | 43 |
| Linaclotidebrand: Linzess | 70 | 16 |
| Pantoprazole Sodium | 51 | 14 |
| Mirtazapine | 25 | — |
| Adalimumabbrand: Humira(cf) Pen | 14 | — |
| Hydrocortisone | 14 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,027 across 45 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-20
- Last updated
- 2021-01-05
- Certified
- 2021-01-05
Frequently asked questions
- What is Iheanyichukwu Aja-Onu's NPI number?
- Iheanyichukwu Aja-Onu's National Provider Identifier (NPI) is 1720077944, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Iheanyichukwu Aja-Onu's specialty?
- Iheanyichukwu Aja-Onu is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Iheanyichukwu Aja-Onu located?
- Iheanyichukwu Aja-Onu's practice location on file with NPPES is 3 N Main St, Freeport, NY 11520-2218.
- What is Iheanyichukwu Aja-Onu's phone number?
- The practice phone number listed in the NPPES registry for Iheanyichukwu Aja-Onu is (516) 623-5076.
- Does Iheanyichukwu Aja-Onu accept Medicare?
- Iheanyichukwu Aja-Onu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Iheanyichukwu Aja-Onu's NPI active?
- Yes — Iheanyichukwu Aja-Onu's NPI (1720077944) is active in the NPPES registry as of the last update on 2021-01-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.