Dr. Ahamefula Onyike, MD
Contact & Location
202-544-5858
Washington, DC 20003
About Dr. Onyike
Dr. Ahamefula Onyike is a board-certified orthopedic surgeon practicing in Washington, District of Columbia. A Medicare provider since 2006, Dr. Onyike performed 42 Medicare-verified knee replacements (#4 in District of Columbia) and 24 hip replacements in the latest annual CMS data, for a combined total of 66 procedures.
In District of Columbia, Dr. Onyike performs above the state average in knee (42 vs 33), below the state average in hip (24 vs 38).
Dr. Onyike's reported Medicare volume is split between knee replacements (42 cases) and hip replacements (24 cases).
Washington is home to 16 orthopedic surgeons in the current Medicare dataset. Patients in the Washington area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Onyike extend back to 2022, covering 3 years of data. Over that period, recorded procedure volume increased from 12 to 66 in the most recent data, a 450% increase. This sustained growth reflects an expanding joint replacement practice.
Among 6,612 knee replacement surgeons tracked nationally, Dr. Onyike's 42 verified procedures is near the national average of 45.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement |
|---|---|---|
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 12 | 0 |
| 2023 | 16 | 33 |
| 2024 | 24 | 42 |
Verified Medicare Cases
How is this estimated?
Medicare Part B fee-for-service claims are one payer stream among several, and the share they represent differs by procedure. In 2024 it was 23% to 28% for knee replacement, 25% to 33% for hip replacement. Each verified count above is divided by its own procedure's range, and the results are added, to estimate total practice volume across all payers. The verified Medicare count is the definitive, audited figure; this is a range derived from published national volume projections, not a measurement, and an individual practice can sit well outside it: how these ranges are derived, and their sources.
How Dr. Onyike Compares
Procedure volume compared to the District of Columbia state average.
See the Top 25 knee replacement surgeons in District of Columbia
Volume Trend Analysis
Dr. Onyike's Medicare-recorded procedure volume has trended upward over 3 years, increasing 450% from 12 procedures in 2022 to 66 in the most recent data.
Hospital Affiliations & Quality
Quality ratings and complication rates are hospital-level metrics from CMS Hospital Compare and do not reflect individual surgeon performance. Star ratings updated quarterly. Complication data covers a rolling 3-year period.
Patient Resources: Preparing for Knee Replacement
If you are considering knee replacement surgery, these evidence-based guides can help you prepare and recover:
An overview of current surgical approaches including robotic-assisted and minimally invasive techniques, implant options, and expected outcomes.
Prehabilitation: Preparing Your Body for SurgeryEvidence-based exercises and lifestyle adjustments that can improve surgical outcomes and speed recovery when started weeks before your procedure.
Rehabilitation Roadmap: Your Complete Recovery GuideA structured physical therapy progression from the first post-op exercises through full strength and mobility restoration over 3 to 6 months.
Medicare Bundled Payment Programs for Joint ReplacementHow bundled payment models affect your joint replacement costs and care coordination, and what it means for hospital and surgeon selection.
Knee Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after knee replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full knee replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. Onyike
How does Dr. Onyike's procedure volume compare to other District of Columbia surgeons?
Dr. Onyike has performed 66 Medicare-verified joint replacement procedures. This is in line with the District of Columbia average of 58 procedures per surgeon. Dr. Onyike ranks #6 out of 16 orthopedic surgeons in District of Columbia.
What types of joint replacement does Dr. Onyike perform?
Dr. Onyike's Medicare data shows procedures in knee replacement (42 cases) and hip replacement (24 cases).
How experienced is Dr. Onyike with knee replacement surgery?
Dr. Onyike ranks #4 in District of Columbia for knee replacement with 42 Medicare-verified procedures. This high ranking among 16 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Onyike in Washington?
Yes. There are 16 orthopedic surgeons in Washington in the current Medicare dataset. Patients can compare procedure volumes and specializations to choose the surgeon who best fits their needs. Use the state page to view all District of Columbia surgeons.
What does the Medicare data for Dr. Onyike represent?
The procedure counts shown are based on 2024 Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). Medicare fee-for-service is only one payer stream, and the share of national volume it represents differs by procedure. In 2024 the share was 23% to 28% for knee replacement, 25% to 33% for hip replacement, which puts Dr. Onyike's total volume across all insurers at roughly 220 to 280 procedures against the 66 verified here. Those shares are derived from published national volume projections rather than quoted from a single publication, and they are estimates with real uncertainty. The OrthoProcedures methodology page shows the full derivation, the sources, and the limits at orthoprocedures.com/data-methodology.html.
Has Dr. Onyike's procedure volume changed over time?
Yes. Dr. Onyike's Medicare-recorded volume has increased from 12 procedures in 2022 to 66 in the most recent data, a 450% increase over 3 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 66 procedures in 2024.
Does Dr. Onyike perform more than one type of joint replacement?
Yes. Dr. Onyike's Medicare data shows procedures in knee replacement (42 cases), hip replacement (24 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Onyike affiliated with?
According to CMS facility affiliation data, Dr. Onyike is affiliated with Holy Cross Hospital, Medstar Southern Maryland Hospital Center. Dr. Onyike maintains hospital privileges across state lines, indicating a practice that serves patients in multiple states.
How does Dr. Onyike compare to other orthopedic surgeons in Washington?
Among the 16 orthopedic surgeons in Washington, Dr. Onyike ranks #6 by total Medicare procedure volume. The highest-volume surgeon in Washington has 126 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Onyike practices?
Holy Cross Hospital (2 out of 5 CMS stars, hip/knee complication rate similar to national average); Medstar Southern Maryland Hospital Center (2 out of 5 CMS stars, hip/knee complication rate similar to national average). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Washington, District of Columbia
Dr. Onyike's 66 Medicare procedures are below the Washington average of 89. The table below compares verified procedure volumes for orthopedic surgeons practicing in Washington.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Savyasachi Thakkar | 126 | Hip, Knee |
| Dr. Anthony Unger | 123 | Hip, Knee |
| Dr. Kenneth Vaz | 92 | Hip, Knee |
| Dr. Matthew Harb | 83 | Hip, Knee |
| Dr. Afamefuna Nduaguba | 68 | Hip, Knee |
| Dr. Kevin Park | 64 | Hip, Knee |
Patient Resources & Verification
Research reviews, verify credentials, and check official quality data through these trusted sources:
Medicare Care Compare and NPI Registry are official U.S. government sources. Google reviews reflect user-submitted feedback. OrthoProcedures.com does not verify the accuracy of third-party review content.