Physician Profile
Onyema Nnanna, M.D.
Unclaimed ProfileAbout Dr. Nnanna
Listed in the NPI registry as a hospitalist, Onyema Nnanna, M.D. practices in Chesterfield, MO. Onyema is also listed as specializing in internal medicine. According to Medicare claims data, Onyema cared for 630 Medicare patients across 1,010 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, hospital discharge day management, 30 minutes or less, and subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes. NPI 1164872768 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (314) 205-6050
- Email not available
Practice Locations
222 S WOODS MILL RD
Chesterfield, MO 63017
1101 W Liberty St
Farmington, MO 63640
Conditions Commonly Evaluated or Treated
Within Hospital Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Allergic Reactions
- Severe Allergic Reaction
Blood Clots
Blood Disorders
- Sickle Cell Pain Crisis
Brain & nerves
- Alcohol withdrawal
- Delirium
- Fainting and syncope
- Meningitis
- Transient ischemic attack
Brain & Nerves
Breathing & lungs
Digestive health
- Acute gallbladder inflammation
- Acute pancreatitis
- Ascites
- Bowel obstruction
- C. diff diarrhea
- Severe diverticulitis flare-up
- Stomach or intestinal bleeding
Emergencies
- Drug overdose or poisoning
Endocrine
- Dangerously High Calcium
General medical
- Hip fracture medical care
- Low sodium or electrolyte imbalance
- Post-surgery fever or infection
- Severe dehydration
- Short stature and growth concerns
Heart & Circulation
- A-Fib Flare-Up
- Heart Attack Inpatient Care
- Shock
Heart & circulation
- Dangerous high blood pressure
- Deep vein thrombosis
- Heart failure flare-up
- Severe anemia
- Supraventricular tachycardia
- Unexplained chest pain
Hormones & diabetes
Infections
- Bone infection
- Cellulitis
- Complicated Bladder Infection
- Flesh-Eating Infection
- Infective endocarditis
- Sepsis or blood infection
- Severe COVID-19 illness
- Severe flu illness
Kidney & urinary
Liver & Digestive
- Hepatic encephalopathy
- Severe Fecal Impaction
- Sudden Liver Failure
Lung Infections
- Hospital-Acquired Pneumonia
- Severe Pneumonia
Lungs & Breathing
Nutrition
- Severe Malnutrition In Hospital
Procedures & services
Access & tubes
- Arterial catheter placement
- Central line placement
- Feeding or stomach tube insertion
- PICC line placement coordination
- Urinary catheter insertion
Addiction Medicine
- Inpatient Opioid Withdrawal Induction
Airway & Breathing
- Emergency intubation
- Tracheostomy care
Breathing support
- BiPAP or CPAP therapy
- Breathing machine management
- Oxygen therapy
Critical Care
- Continuous IV Sedation Management
- CPR and defibrillation
- Rapid Response Team Call
Diagnostic procedures
- Emergency ultrasound
- Hospital heart rhythm monitoring
- Lumbar puncture
- Swallowing safety evaluation coordination
Diagnostic Testing
- Blood Culture Workup
Draining fluids
Emergency Care
- Blood Thinner Reversal
Heart Procedures
- Bedside Heart Ultrasound
- Electrical cardioversion
Hospital services
- Alcohol detox monitoring
- Comfort care transition
- Fall risk assessment
- Hospital admission
- Hospital discharge planning
- Hospital observation care
- Hospital wound and bed sore care
- Inpatient dialysis coordination
- Inpatient physical therapy evaluation
- Medication management
- Post-surgery hospital recovery care
- Pre-surgery medical clearance
- Rehab or nursing home placement evaluation
- Specialist consultation coordination
Joint Procedures
Kidney Care
- Inpatient Peritoneal Dialysis Care
Lung Procedures
Medication & fluids
- Blood sugar insulin drip
- Blood thinner drip management
- Blood transfusion
- IV antibiotic treatment
- IV electrolyte replacement
- IV fluids
- Patient-Controlled Analgesia (PCA) Setup
Mental Health
- Medical-Psychiatric Inpatient Evaluation
Neurological Care
- Continuous Neurological Checks
- Emergency Stroke Response
Nutrition Support
- IV Nutrition For Preemies
Rehabilitation
- Inpatient Occupational Therapy Evaluation
Urinary Care
- Continuous Bladder Irrigation
Procedures Most Often Billed to Medicare
1,010 services · 630 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
543 | More than most peers in Hospitalist |
| Hospital discharge day management, 30 minutes or less | Office visit | 99238 |
143 | More than most peers in Hospitalist |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
110 | As often as other peers in Hospitalist |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
107 | More often than most peers in Hospitalist |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
66 | More often than most peers in Hospitalist |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
41 | Less often than most peers in Hospitalist |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other hospitalists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other hospitalists in Chesterfield 7
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2009 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Onyema Nnanna?
Onyema Nnanna is a hospitalist in Chesterfield, MO. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Onyema Nnanna's address?
Onyema Nnanna is listed at 222 S Woods Mill Rd, Chesterfield, MO 63017. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Onyema Nnanna?
The number on file is (314) 205-6050. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Onyema Nnanna's NPI number?
Onyema Nnanna's National Provider Identifier is 1164872768. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Onyema Nnanna train?
Onyema Nnanna attended Other, graduating in 2009. This comes from the CMS National Downloadable File.
CMS public data
How long has Onyema Nnanna been practicing?
Onyema Nnanna has 17 years experience. Calculated from a graduation year of 2009, reported in the CMS National Downloadable File.
CMS public data
What procedures does Onyema Nnanna perform?
According to Medicare billing data, Onyema Nnanna the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Onyema Nnanna confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Onyema Nnanna. If this is you, claiming it is free.
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