Onyema Nnanna, MD - Medicare Internal Medicine in Chesterfield, MO

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Onyema Nnanna, MD is a medicare enrolled "Hospitalist" physician in Chesterfield, Missouri. He graduated from medical school in 2009 and has 15 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Cole Physician Services Llc, Ies Hsp Missouri Llc, Lester E Cox Medical Centers, Physician Groups Lc, Midwest Inpatient Anderson Health Inc and his current practice location is 222 S Woods Mill Rd, Chesterfield, Missouri. You can reach out to his office (for appointments etc.) via phone at (314) 205-6050.

Onyema Nnanna is licensed to practice in Missouri (license number 2019023516) 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 1164872768.

Contact Information

Onyema Nnanna, MD
222 S Woods Mill Rd,
Chesterfield, MO 63017-3625
(314) 205-6050
(314) 434-5939

Map and Direction




Physician's Profile

Full NameOnyema Nnanna
GenderMale
SpecialityInternal Medicine
Experience15 Years
Location222 S Woods Mill Rd, Chesterfield, Missouri
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:
  • Onyema Nnanna graduated from medical school in 2009
  NPI Data:
  • NPI Number: 1164872768
  • Provider Enumeration Date: 06/15/2016
  • Last Update Date: 12/06/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 7416224175
  • Enrollment ID: I20220329001318

Medical Identifiers

Medical identifiers for Onyema Nnanna such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1164872768NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 2019023516 (Missouri)Secondary
208M00000XHospitalist 2019023516 (Missouri)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Cox Medical CentersSpringfield, MOHospital
Parkland Health CenterFarmington, MOHospital
Anderson HospitalMaryville, ILHospital
Poplar Bluff Regional Medical CenterPoplar bluff, MOHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Cole Physician Services Llc064842081028
Ies Hsp Missouri Llc317398929021
Lester E Cox Medical Centers5799787784195
Physician Groups Lc3072421254409
Midwest Inpatient Anderson Health Inc307290847440

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. Onyema Nnanna allows following entities to bill medicare on his behalf.
Entity NameMercy Clinic Springfield Communities
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1245277631
PECOS PAC ID: 7416865845
Enrollment ID: O20031104000060
Entity NameMercy Clinic Springfield Communities
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1972771657
PECOS PAC ID: 7416865845
Enrollment ID: O20031218000354
Entity NamePhysician Groups Lc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285664268
PECOS PAC ID: 3072421254
Enrollment ID: O20040220001157
Entity NameLester E Cox Medical Centers
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1902969272
PECOS PAC ID: 5799787784
Enrollment ID: O20070215000622
Entity NameCogent Healthcare Of Missouri Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1780961599
PECOS PAC ID: 5597925099
Enrollment ID: O20120320000863
Entity NameCole Physician Services Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1144578659
PECOS PAC ID: 0648420810
Enrollment ID: O20121024000296
Entity NameSound Physicians Of Illinois Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1043598865
PECOS PAC ID: 1557533734
Enrollment ID: O20170519000666
Entity NameHospitalist Medicine Physicians Of Missouri - Bridgeton, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1275012452
PECOS PAC ID: 2567713571
Enrollment ID: O20181001001537
Entity NameGalen Inpatient Physicians Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538714688
PECOS PAC ID: 3678464633
Enrollment ID: O20191115000362
Entity NameMidwest Hospitalist Physicians Llp
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1891242319
PECOS PAC ID: 9830487966
Enrollment ID: O20200915000597
Entity NameIes Hsp Missouri Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1962102871
PECOS PAC ID: 3173989290
Enrollment ID: O20230516001984

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. Onyema Nnanna 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
Onyema Nnanna, MD
222 S Woods Mill Rd,
Chesterfield, MO 63017-3625

Ph: (314) 205-6050		Onyema Nnanna, MD
222 S Woods Mill Rd,
Chesterfield, MO 63017-3625

Ph: (314) 205-6050

Reviews and Comments


Hospitalist Doctors in Chesterfield, MO

Gary A Vickers, DO
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 224 S Woods Mill Rd Ste 435s, Chesterfield, MO 63017
Phone: 314-576-2394    Fax: 314-590-5937
Margaret Fonseca Kressig, NP
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 224 S Woods Mill Rd Ste 580, Chesterfield, MO 63017
Phone: 314-413-0096    

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.