Onyeka Nwachukwu, MD
NPI 1841852746 · Internal Medicine Physician · Elizabeth, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Onyeka Nwachukwu, MD is a Internal Medicine Physician provider in Elizabeth, NJ (NPI 1841852746).
Provider details
- NPI number
- 1841852746
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
6 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
587 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 50 Minutes99233 | 273 | $111 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 119 | $74 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 92 | $106 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 54 | $162 |
| Critical Care, First 30-74 Minutes99291 | 49 | $199 |
Typical Medicare-allowed amounts for these services range $74–$199 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 38 | 33 |
| Cefdinir | 38 | 36 |
| Atorvastatin Calcium | 29 | 19 |
| Metoprolol Succinate | 25 | 17 |
| Amlodipine Besylate | 23 | 17 |
| Furosemide | 23 | 17 |
| Pantoprazole Sodium | 20 | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-07-01
- Last updated
- 2022-06-14
- Certified
- 2022-06-14
Frequently asked questions
- What is Onyeka Nwachukwu's NPI number?
- Onyeka Nwachukwu's National Provider Identifier (NPI) is 1841852746, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Onyeka Nwachukwu's specialty?
- Onyeka Nwachukwu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Onyeka Nwachukwu located?
- Onyeka Nwachukwu's practice location on file with NPPES is 225 Williamson St, Elizabeth, NJ 07202-3625.
- What is Onyeka Nwachukwu's phone number?
- The practice phone number listed in the NPPES registry for Onyeka Nwachukwu is (908) 994-5000.
- Does Onyeka Nwachukwu accept Medicare?
- Onyeka Nwachukwu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Onyeka Nwachukwu's NPI active?
- Yes — Onyeka Nwachukwu's NPI (1841852746) is active in the NPPES registry as of the last update on 2022-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.