Julius Kunle Oni, M.D.

Headshot of Julius Kunle Oni
  • Director, Johns Hopkins Adult Hip and Knee Arthroplasty Fellowship Program
  • Assistant Professor of Orthopaedic Surgery

Languages: English, Yoruba


Degenerative Joint Disease (Osteoarthritis of the Hip), Hip Arthritis, Hip Bursitis, Hip Conditions, Hip Dislocations, Hip Fractures, Hip Injuries, Hip Replacement, Joint Replacement, Knee Arthritis, Knee Dislocations, Knee Injuries, Knee Joint Arthroscopy, Knee Replacement, Knee Surgery, Orthopaedic Surgery, Partial Knee Replacement, Revision Hip Surgery, Revision Knee Surgery, Total Hip Replacement, Total Joint Replacement, Total Knee Replacement ...read more

Research Interests

optimization of postoperative outcomes after total joint replacement; unicompartmental knee replacement; avascular necrosis; the use of augmented reality in preoperative patient education and surgical preparation ...read more

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Outside of Maryland & Washington D.C.

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Johns Hopkins Bayview Medical Center

Appointment Phone: 443-997-2663
4940 Eastern Avenue
Building A 6th Floor
Baltimore, MD 21224 map

Johns Hopkins Medicine - White Marsh

Appointment Phone: 443-997-2663
4924 Campbell Boulevard
Nottingham, MD 21236 map

Johns Hopkins Medicine - Green Spring Station

Appointment Phone: 443-997-2663
10803 Falls Road
Pavilion III, Suite 2100
Lutherville, MD 21093 map


Julius Oni, M.D., is a member of the Department of Orthopaedic Surgery who specializes in hip and knee replacement, particularly minimally invasive joint replacement surgery and complex primary and revision joint replacements.

His research interests include optimization of postoperative outcomes after total hip and knee replacements, unicompartmental knee replacement, avascular necrosis, and the use of technology in preoperative patient education and surgical preparation.

He is a member of the American Academy of Orthopaedic Surgeons (AAOS), the American Association of Hip and Knee Surgeons (AAHKS), and the National Medical Association. He serves on the AAHKS Humanitarian Committee; and is currently the Mentoring Committee Chair for the J. Robert Gladden Orthopaedic Society.

...read more


  • Director, Johns Hopkins Adult Hip and Knee Arthroplasty Fellowship Program
  • Chair of Diversity Council and Diversity and Inclusion Officer, Department of Orthopedic Surgery
  • Assistant Professor of Orthopaedic Surgery

Departments / Divisions

Centers & Institutes



  • MD; Howard University College of Medicine (2007)


  • Orthopaedic Surgery; NYU Langone Medical Center (2012)


  • Adult Reconstructive Orthopedic Surgery; Rush University Medical Center (2013)

Board Certifications

  • American Board of Orthopaedic Surgery (Orthopaedic Surgery) (2015)

Research & Publications

Selected Publications

View all on PubMed

The role of femoral neck anteversion in the development of osteoarthritis in dysplastic hips. Li H, Wang Y, Oni JK, Qu X, Li T, Zeng Y, Liu F, Zhu Z. Bone Joint J. 2014 Dec;96-B(12):1586-93. doi: 10.1302/0301-620X.96B12.33983.

Chronic infection leading to failure of a composite femoral stem: a report of two cases. Saltzman BM, Haughom B, Oni JK, Levine BR. HSS J. 2014 Jul;10(2):180-5. doi: 10.1007/s11420-013-9378-0. Epub 2014 Jan 16.

Effect of a selective COX-2 inhibitor, celecoxib, on heterotopic ossification after total hip arthroplasty: a case-controlled study. Oni JK, Pinero JR, Saltzman BM, Jaffe FF. Hip Int. 2014 May-Jun;24(3):256-62. doi: 10.5301/hipint.5000109. Epub 2014 Jan 28.

Total hip replacement for developmental dysplasia of the hip with more than 30% lateral uncoverage of uncemented acetabular components. Li H, Mao Y, Oni JK, Dai K, Zhu Z. Bone Joint J. 2013 Sep;95-B(9):1178-83. doi: 10.1302/0301-620X.95B9.31398.

Prognostic Value of the Radiologic Appearance of the Navicular Ossification Center in Congenital Talipes Equinovarus. Atanda AA, Oni JK, Ramsden DM, Yoon RS, Ahmad AA, Otsuka NY. J Foot Ankle Surg. 2015 Sep-Oct;54(5):844-7. doi: 10.1053/j.jfas.2015.01.007. Epub 2015 Jun 3.

Activities & Honors


  • Top Doctor, Baltimore Magazine, 2019
  • Top Doctor, Baltimore Magazine, 2020
  • Top Doctor, Baltimore Magazine, 2021
  • Top Doctor, Baltimore Magazine, 2022


  • American Academy of Orthopaedic Surgeons


  • American Association of Hip and Knee Surgeons
  • National Medical Association

Videos & Media

  • Play Video:

    Hip Joint Pain | Q&A with Dr. Julius Oni

  • Play Video:

    Avascular Necrosis Q&A with Dr. Julius Oni

Recent News Articles and Media Coverage

The 4 Stages of Osteoarthritis | HealthCentral (December 2020)

11 Facts About Osteoarthritis Everyone Should Know | HealthCentral (December 2020)

8 Best Non-Surgical Treatments for Osteoarthritis | HealthCentral (December 2020)

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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