John Onyemaechi Nnadi, MD
Infectious Disease Physician · Baton Rouge, LA
John Onyemaechi Nnadi, MD is an infectious disease physician with a practice address in Baton Rouge, Louisiana, and NPI 1558506782, issued on Dec 2, 2008. Check the license (Louisiana MD.202997, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Onyemaechi Nnadi
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- MD.202997 LA
C1-0025159 DE
20962 MS
Self-reported in NPPES; status is on the state search - Practice location
- 17000 Medical Center Dr, Baton Rouge, LA 70816
- Phone
- (225) 752-2470
- Enumerated
- Dec 2, 2008
- Record last updated
- Nov 17, 2022
- Medicaid ID
- 1883115 LA
- Medicare enrollment
- Enrolled (PECOS I20100608000868); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 128 in Louisiana → Look up another NPI →
Also registered at 17000 Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ebunoluwa Adesokan, NPAdult Health Nurse Practitioner1780394965
- Nicole Allen, ACNP-BCAcute Care Nurse Practitioner1801158886
- Lisa Baldridge, DOEmergency Medicine Physician1457328999
- Tanreka BateasteMedical-Surgical Registered Nurse1952251704
- Ashlyn Bergeron, MDEmergency Medicine Physician1144545963
- Joan Broussard, PHARM.D.Pharmacist1043763022
Verify John Onyemaechi Nnadi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license MD.202997Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12.4 times the Medicare Part D claims of the average infectious disease physician in 2024
8,518 Medicare Part D claims for 424 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. 80 claims were for opioids.
Most prescribed
- Atorvastatin Calcium412 claims
- Amlodipine Besylate378 claims
- Gabapentin271 claims
- Pantoprazole Sodium194 claims
- Eliquis171 claims
- Furosemide161 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $17.18
1 payment: food and beverage; the largest payer was ViiV Healthcare Company. The 3,895 providers of this specialty with any payment received $4,362.19 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
5 hospitals and group practices
- St Joseph HospitalBangor, ME · Acute Care Hospitals3 of 5 stars
- Bayhealth Medical Center, IncDover, DE
- Homedica OF Louisiana, LLCBaton Rouge, LA
- Ochsner Clinic LLCBaton Rouge, LA
- Stem Medical Group PCBaton Rouge, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
John Onyemaechi Nnadi among 128 infectious disease physician records in Louisiana
John Onyemaechi Nnadi, MD is one of 128 infectious disease physician records with a practice address in Louisiana. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 55% of them.
- NPI issued2008 · 55% of these records are older, 38% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1999 · median 2005 among the 85 with a school on file
- Record last updated2022 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Louisiana
There are 128 infectious disease physician records in Louisiana.
All 128 in Louisiana → Every provider in Baton Rouge → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Daniel Shapiro, DOBaton Rouge, LA 708161457841926
- Waref Azmeh, MDBaton Rouge, LA 708091467408492
- Breanna Campbell, MDBaton Rouge, LA 708091295112597
- Scott Anderson, MDBaton Rouge, LA 708081114285293
- Madeleine Heck, MDBaton Rouge, LA 708081407877426
- Katherine Lavie, MDBaton Rouge, LA 708081073812871
- Catherine O'Neal, MDBaton Rouge, LA 708081689715013
- Maria Reyes Angeles, M.DBaton Rouge, LA 708081194012609
Common questions
What is John Onyemaechi Nnadi, MD's NPI number?
John Onyemaechi Nnadi, MD's National Provider Identifier (NPI) is 1558506782, issued on Dec 2, 2008. An NPI identifies a provider in billing; it is not a license.
Where is John Onyemaechi Nnadi, MD located?
The NPPES record lists a practice address at 17000 Medical Center Dr, Baton Rouge, LA, 70816. Phone: (225) 752-2470. Providers update this record themselves, so call before visiting.
How can I verify John Onyemaechi Nnadi, MD's license?
NPPES lists Louisiana license number MD.202997, as entered by the provider. Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Onyemaechi Nnadi, MD prescribe under Medicare Part D?
In 2024, John Onyemaechi Nnadi, MD had 8,518 Medicare Part D claims for 424 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.