Summary

Dr. Ogonna Onyeje specializes in internal medicine and hospital medicine, bringing 27 years of clinical experience to patient care. He earned his medical degree from the University of Nigeria and completed his residency training at Mount Sinai School of Medicine. His dual expertise allows him to provide comprehensive care both in outpatient settings and during hospital stays.

Dr. Onyeje practices at multiple locations throughout California's Central Valley, including affiliations with Kaiser Permanente medical centers in Manteca, Fresno, and Modesto, along with Saint Agnes Medical Center and Mercy Medical Center. He focuses on managing high blood pressure conditions and provides diagnostic services such as heart rhythm monitoring. Patients consistently rate his care highly, with an average rating of 4.0 stars, reflecting his commitment to quality medical service across Fresno, Manteca, and Merced.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4
  • 27 years of experience
  • Mount Sinai School Of Medicine
  • 2 written reviews
  • 2 specialties
  • 5 areas of expertise
  • 2 board certifications
  • 5 hospital affiliations
  • 5 office locations
  • Male

Office Locations

Dr. Ogonna Ignatius Onyeje has 5 locations

Ezenwugo Medical Group And Urgent Care

6769 N Fresno St Ste 201Fresno, CA 93710
Mon9:00 am - 5:00 pm
Tue9:00 am - 5:00 pm
Wed9:00 am - 5:00 pm
Thu9:00 am - 5:00 pm
Fri9:00 am - 5:00 pm
SatClosed
SunClosed

Saint Agnes Medical Center

1303 E Herndon AveFresno, CA 93720

Mercy Medical Center

333 Mercy AveMerced, CA 95340

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Dr. Ogonna Ignatius Onyeje, MD
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Dr. Ogonna Ignatius Onyeje, MDKarthikeyan Viswanathan, DODr. Tooba Rehman, MDEric Harker
Internal MedicineInternal MedicineInternal MedicineInternal Medicine
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
3.9 
27 Years of Experience 12 Years of Experience 16 Years of Experience 25 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English, Tamil Speaks English
Fresno , CALos Altos , CAKaty , TXLyons , CO
Med School: University Of Nigeria Med School: Bassett Medical Center - Cooperstown, New York Med School: CHICAGO MEDICAL SCHOOL AT ROSALIND FRANKLIN UNIVERSITY OF MEDICINE & SCIENCE Med School: Duke University School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Ogonna Ignatius Onyeje

  • Accepts Medicaid

Medical Specialties

Dr. Ogonna Ignatius Onyeje has the following 2 specialties

Specialty Expertise

Dr. Ogonna Ignatius Onyeje has the following 5 areas of expertise

  • Chest Pain
  • Gastrointestinal Bleeding
  • Hospital Medicine
  • Meningitis
  • Pneumonia

Certifications, License, & Education

27 Years Experience

MEDICAL LICENSE

Medical Doctor, California, 2026, Expired

EDUCATION & TRAINING

Residency

Mount Sinai School Of Medicine

Medical School

University Of NigeriaGraduated in 2005
University Of Nigeria Faculty Of MedicineGraduated in 1999

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Frequently Asked Questions

Where is Dr. Ogonna Onyeje's office located?
Dr. Ogonna Onyeje's office is located at 6769 N Fresno St Ste 201, Fresno, CA, 93710.
How can I make an appointment with Dr. Ogonna Onyeje?
You can find contact information for Dr. Ogonna Onyeje here on Vitals.
Which hospitals is Dr. Ogonna Onyeje affiliated with?
Dr. Ogonna Onyeje is affiliated with Kaiser Permanente Manteca Medical Center, Saint Agnes Medical Center, Mercy Medical Center, Kaiser Permanente Fresno Medical Center, and Kaiser Permanente Modesto Medical Center.
Is Dr. Ogonna Onyeje accepting new patients?
Dr. Ogonna Onyeje is accepting new patients on Vitals. View Dr. Ogonna Onyeje's profile on Vitals to make an appointment.
Does Dr. Ogonna Onyeje accept my insurance?
You can see the insurance plans that Dr. Ogonna Onyeje accepts on their Vitals profile.

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