Ezenwa Onyema, MD
NPI 1679852636 · Internal Medicine Physician · Houston, TX
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ezenwa Onyema, MD is a Internal Medicine Physician provider in Houston, TX (NPI 1679852636).
Provider details
- NPI number
- 1679852636
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- 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 tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
407 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 50 Minutes99233 | 281 | $118 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 68 | $113 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 58 | $173 |
Typical Medicare-allowed amounts for these services range $113–$173 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$107 across 3 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
- 2011-08-09
- Last updated
- 2022-06-22
- Certified
- 2022-06-22
Frequently asked questions
- What is Ezenwa Onyema's NPI number?
- Ezenwa Onyema's National Provider Identifier (NPI) is 1679852636, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ezenwa Onyema's specialty?
- Ezenwa Onyema is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ezenwa Onyema located?
- Ezenwa Onyema's practice location on file with NPPES is 6431 Fannin St, Houston, TX 77030-1501.
- What is Ezenwa Onyema's phone number?
- The practice phone number listed in the NPPES registry for Ezenwa Onyema is (713) 704-3989.
- Does Ezenwa Onyema accept Medicare?
- Ezenwa Onyema is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ezenwa Onyema's NPI active?
- Yes — Ezenwa Onyema's NPI (1679852636) is active in the NPPES registry as of the last update on 2022-06-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.