Felix Nnaji, MD
NPI 1801890223 · Internal Medicine Physician · Bolivar, TN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Felix Nnaji, MD is a Internal Medicine Physician provider in Bolivar, TN (NPI 1801890223).
Provider details
- NPI number
- 1801890223
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 32096 (TN)
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
21 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
93 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 Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 93 | $99 |
Typical Medicare-allowed amounts for these services range $99–$99 (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 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 155 | 16 |
| Atorvastatin Calcium | 105 | 17 |
| Apixabanbrand: Eliquis | 85 | — |
| Levothyroxine Sodium | 77 | — |
| Escitalopram Oxalate | 63 | — |
| Ipratropium/Albuterol Sulfatebrand: Ipratropium-Albuterol | 55 | — |
| Dextromethorphan Hbr/Quinidine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$98 across 1 record (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
- 2005-06-13
- Last updated
- 2013-11-21
Frequently asked questions
- What is Felix Nnaji's NPI number?
- Felix Nnaji's National Provider Identifier (NPI) is 1801890223, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Felix Nnaji's specialty?
- Felix Nnaji is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Felix Nnaji located?
- Felix Nnaji's practice location on file with NPPES is 640 Nuckolls Rd, Bolivar, TN 38008-1532.
- What is Felix Nnaji's phone number?
- The practice phone number listed in the NPPES registry for Felix Nnaji is (731) 659-2273.
- Does Felix Nnaji accept Medicare?
- Felix Nnaji is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Felix Nnaji's NPI active?
- Yes — Felix Nnaji's NPI (1801890223) is active in the NPPES registry as of the last update on 2013-11-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.