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ONYEMA NNANNA M.D.
NPI 1164872768
Hospitalist in Chesterfield, MO

Active since June 15, 2016PECOS EnrolledAccepts Medicare Assignment
222 S WOODS MILL RD, CHESTERFIELD, MO 63017(314) 205-6050(314) 434-5939 Get Directions Write a Review

NPPES record last updated: October 14, 2024. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Dec 6, 2022, Jun 15, 2016 (2 updates tracked since 2016).

About Onyema Nnanna M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ONYEMA NNANNA M.D. (NPI 1164872768) is an individual hospitalist provider in Chesterfield, Missouri, licensed in Missouri (2019023516) and active in the NPI registry since June 2016. He is enrolled in Medicare PECOS, is affiliated with Ssm Health St Mary's Hospital -centralia, and maintains a secondary practice location in Farmington.

NPPES Registry Identity

NPI1164872768
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameONYEMA NNANNACredential: M.D.
Location Address222 S WOODS MILL RDChesterfield, MO 63017-3625
Mailing Address222 S Woods Mill RdChesterfield, MO 63017-3625 · (314) 205-6050 · Fax (314) 434-5939
Phone(314) 205-6050
Fax(314) 434-5939
Sole ProprietorNo
Medical School CMSOtherGraduated 2009
Enumeration DateJune 15, 2016
Last NPPES UpdateOctober 14, 20242 updates tracked since enumeration
NPPES CertifiedOctober 14, 2024
✔ NPI 1164872768 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in MO · 2019023516
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Also ListedInternal MedicineTaxonomy 207R00000X · License 2019023516 (MO)
222 S WOODS MILL RD, Chesterfield, MO 63017
Open in Google Maps ↗

Secondary Practice Location 1

Location 11101 W Liberty StFarmington, MO 63640-1921 · Phone (573) 705-1272

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Medica and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Onyema Nnanna M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7416224175
PECOS Enrollment IDI20220329001318, I20230310001319
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
543 services217 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
143 services142 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
110 services61 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
107 services105 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
66 services64 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
41 services41 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Ssm Health St Mary's Hospital -Centralia

Acute Care Hospitals · Centralia, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140034
Location400 North Pleasant AvenueCentralia, IL 62801 · Marion County
Emergency services

Anderson Hospital

Acute Care Hospitals · Maryville, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140289
Location6800 State Route 162Maryville, IL 62062 · Madison County
Emergency services Birthing friendly

Ssm Health Saint Louis University Hospital

Acute Care Hospitals · Saint Louis, MO
1/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number260105
Location3635 Vista AveSaint Louis, MO 63110 · St. Louis City County
Emergency services

Poplar Bluff Regional Medical Center

Acute Care Hospitals · Poplar Bluff, MO
2/5 CMS rating
OwnershipProprietary
CMS Certification Number260119
Location3100 Oak Grove RoadPoplar Bluff, MO 63901 · Butler County
Emergency services Birthing friendly

University Of Missouri Health Care

Acute Care Hospitals · Columbia, MO
2/5 CMS rating
OwnershipGovernment - State
CMS Certification Number260141
LocationOne Hospital DriveColumbia, MO 65212 · Boone County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63017 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier12 claims12 services$89.37 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. KIMBERLY C GRUNZINGER MSN, RN, ACNS-BC
Clinical Nurse Specialist (Adult Health)
222 S WOODS MILL RD, SUITE 480 N
CHESTERFIELD, MO 63017
St. Louis County (314) 576-7343
RACHEL LYNN FISHMAN OIKNINE M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
222 S WOODS MILL RD, SUITE 410N
CHESTERFIELD, MO 63017
St. Louis County (314) 469-6224
MARYLAND MEDICAL GROUP LTD
Internal Medicine
222 S WOODS MILL RD, SUITE 350N
CHESTERFIELD, MO 63017
St. Louis County (314) 205-6557
MARIA THERESA WEIR
Nurse Practitioner (Adult Health)
222 S WOODS MILL RD, SUITE 410N
CHESTERFIELD, MO 63017
St. Louis County (314) 469-6224
JOHN BEST MD
Internal Medicine (Pulmonary Disease)
222 S WOODS MILL RD, SUITE 310 NORTH
CHESTERFIELD, MO 63017
St. Louis County (314) 576-6700
WEST COUNTY OPHTHALMOLOGY, INC
Ophthalmology
222 S WOODS MILL RD, SUITE 660N
CHESTERFIELD, MO 63017
St. Louis County (314) 878-9902
TARISAI SHARON NYAHODA MD
Internal Medicine (Geriatric Medicine)
222 S WOODS MILL RD
CHESTERFIELD, MO 63017
St. Louis County (314) 205-6050
ZOE LEYH DO
Internal Medicine (Infectious Disease)
222 S WOODS MILL RD
CHESTERFIELD, MO 63017
St. Louis County (314) 205-6050

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Onyema Nnanna's NPI number?

The NPI number for Onyema Nnanna is 1164872768. It was assigned to this individual provider in the NPPES registry on June 15, 2016.

Where is Onyema Nnanna located?

Onyema Nnanna practices at 222 S Woods Mill Rd, Chesterfield, MO 63017. The listed phone number is (314) 205-6050.

What is Onyema Nnanna's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Onyema Nnanna enrolled in Medicare?

Yes. Onyema Nnanna is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Onyema Nnanna accept?

Health plans from Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Medica and Oscar Insurance Company list Onyema Nnanna as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Onyema Nnanna affiliated with any hospitals?

According to CMS data, Onyema Nnanna is affiliated with Ssm Health St Mary's Hospital -Centralia, Anderson Hospital, Ssm Health Saint Louis University Hospital, Poplar Bluff Regional Medical Center and University Of Missouri Health Care.

When was this NPI record last updated?

The NPPES record for Onyema Nnanna was last updated on October 14, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.