John Onyemaechi Nnadi, MD - Medicare Internal Medicine in Baton Rouge, LA

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John Onyemaechi Nnadi, MD is a medicare enrolled "Internal Medicine - Infectious Disease" physician in Baton Rouge, Louisiana. He graduated from medical school in 1999 and has 27 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Stem Medical Group Pc, Homedica Of Louisiana, Llc, Ochsner Clinic Llc, Bayhealth Medical Center, Inc, St Joseph Hospital and his current practice location is 17000 Medical Center Dr, Baton Rouge, Louisiana. You can reach out to his office (for appointments etc.) via phone at (225) 752-2470.

John Onyemaechi Nnadi is licensed to practice in Louisiana (license number MD.202997) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1558506782.

Contact Information

John Onyemaechi Nnadi, MD
17000 Medical Center Dr,
Baton Rouge, LA 70816-3246
(225) 752-2470
Not Available

Map and Direction




Physician's Profile

Full NameJohn Onyemaechi Nnadi
GenderMale
SpecialityInternal Medicine
Experience27 Years
Location17000 Medical Center Dr, Baton Rouge, Louisiana
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • John Onyemaechi Nnadi graduated from medical school in 1999
  NPI Data:
  • NPI Number: 1558506782
  • Provider Enumeration Date: 12/02/2008
  • Last Update Date: 11/17/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 8921138546
  • Enrollment ID: I20100608000868

Medical Identifiers

Medical identifiers for John Onyemaechi Nnadi such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1558506782NPI-NPPES
1883115MedicaidLA
05202301OtherMSMEDICAID

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 20962 (Mississippi)Secondary
207R00000XInternal Medicine MD.202997 (Louisiana)Secondary
207RI0200XInternal Medicine - Infectious Disease 20962 (Mississippi)Secondary
207RI0200XInternal Medicine - Infectious Disease C1-0025159 (Delaware)Secondary
207RI0200XInternal Medicine - Infectious Disease MD.202997 (Louisiana)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Stat Home Health, LlcLa place, LAHome health agency
Baton Rouge General Medical CenterBaton rouge, LAHospital
Havasu Regional Medical CenterLake havasu city, AZHospital
Ochsner Medical Center - Baton RougeBaton rouge, LAHospital
Lourdes Medical CenterPasco, WAHospital
Trios HealthKennewick, WAHospital
Center Point Health Care And RehabBaton rouge, LANursing home
Mid City Community Nursing And RehabBaton rouge, LANursing home
Capitol House Nursing And Rehab CenterBaton rouge, LANursing home
Sage Rehabilitation Hospital SnfBaton rouge, LANursing home

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Stem Medical Group Pc17597541878
Homedica Of Louisiana, Llc478982583724
Ochsner Clinic Llc82249336192538
Bayhealth Medical Center, Inc1658364740348
St Joseph Hospital6406766336170

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. John Onyemaechi Nnadi allows following entities to bill medicare on his behalf.
Entity NameOchsner Clinic Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538151428
PECOS PAC ID: 8224933619
Enrollment ID: O20031126000513
Entity NameIndependence Physician Services Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1700102621
PECOS PAC ID: 5799978052
Enrollment ID: O20101019000571
Entity NameHomedica Of Louisiana, Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1174866479
PECOS PAC ID: 4789825837
Enrollment ID: O20130801000255
Entity NameHospitalist Medicine Physicians Of Texas Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1629307095
PECOS PAC ID: 3476688318
Enrollment ID: O20151021000365
Entity NameMercy Medical Health Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1063945434
PECOS PAC ID: 1557639655
Enrollment ID: O20170614000398
Entity NameMayfair Physician Services, Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1831688365
PECOS PAC ID: 7618225814
Enrollment ID: O20180803002194
Entity NameHospital Physician Services - Southeast Professional Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760410385
PECOS PAC ID: 5597774554
Enrollment ID: O20181106002747
Entity NameStem Medical Group Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1508592361
PECOS PAC ID: 1759754187
Enrollment ID: O20230407001968
Entity NameStem Medical Group Michigan Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336875186
PECOS PAC ID: 9234586009
Enrollment ID: O20240408001432
Entity NameStem Operating Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1316673171
PECOS PAC ID: 1557734258
Enrollment ID: O20240816000590

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. John Onyemaechi Nnadi is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
John Onyemaechi Nnadi, MD
2925 Tradition Ave,
Baton Rouge, LA 70810-0336

Ph: (214) 909-9071		John Onyemaechi Nnadi, MD
17000 Medical Center Dr,
Baton Rouge, LA 70816-3246

Ph: (225) 752-2470

Reviews and Comments


Internal Medicine Doctors in Baton Rouge, LA

Dr. Jennifer L Rippon, D.O.
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 7777 Hennessy Blvd Ste 409, Baton Rouge, LA 70808
Phone: 225-765-5864    Fax: 225-765-2013
Gregory Fusilier, M.D.
Infectious Disease
Medicare: Medicare Enrolled
Practice Location: 9103 Jefferson Hwy, Baton Rouge, LA 70809
Phone: 225-927-1190    Fax: 225-927-0988
Dr. Yolanda Maria O'rourke,
Infectious Disease
Medicare: Not Enrolled in Medicare
Practice Location: 7968 Essen Park, Baton Rouge, LA 70809
Phone: 225-761-6700    Fax: 225-761-6760
Patricia D. Whatley, MD
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 7373 Perkins Rd, Attn: Dee / Administration, Baton Rouge, LA 70808
Phone: 225-769-4044    
Frederick Cerise,
Infectious Disease
Medicare: Not Enrolled in Medicare
Practice Location: 3810 W Lakeshore Dr, Baton Rouge, LA 70808
Phone: 225-578-8886    
Nicholas Kyle Baldwin,
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 9103 Jefferson Hwy, Baton Rouge, LA 70809
Phone: 225-927-1190    
Dr. Jon Richard Jackson, M.D.
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 5000 Hennessy Blvd, Baton Rouge, LA 70808
Phone: 225-765-4050    Fax: 225-765-4046

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.