Dr. Kenneth Jahng, MD
Contact & Location
909-557-1600
Rancho Cucamonga, CA 91730
About Dr. Jahng
Dr. Kenneth Jahng is a board-certified orthopedic surgeon practicing in Rancho Cucamonga, California. A Medicare provider since 2009, Dr. Jahng performed 41 Medicare-verified knee replacements (#184 in California) and 23 hip replacements in the latest annual CMS data, for a combined total of 64 procedures.
In California, Dr. Jahng performs near the state average in knee (41 vs 47), below the state average in hip (23 vs 41).
Dr. Jahng's reported Medicare volume is split between knee replacements (41 cases) and hip replacements (23 cases).
Dr. Jahng is the only orthopedic surgeon in Rancho Cucamonga represented in the current Medicare dataset, serving as the primary local option for patients considering joint replacement surgery in the area.
Medicare records for Dr. Jahng extend back to 2017, covering 7 years of data. Over that period, recorded procedure volume increased from 16 to 64 in the most recent data, a 300% increase. This sustained growth reflects an expanding joint replacement practice.
Among 6,599 knee replacement surgeons tracked nationally, Dr. Jahng's 41 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 | 16 |
| 2018 | 0 | 0 |
| 2019 | 16 | 23 |
| 2020 | 0 | 15 |
| 2021 | 17 | 29 |
| 2022 | 20 | 25 |
| 2023 | 18 | 31 |
| 2024 | 23 | 41 |
Verified Medicare Cases
How is this estimated?
Medicare Part B fee-for-service claims represent approximately 33–37% of all joint replacements performed nationally (source: CMS data, AJRR). This range estimates the surgeon's total practice volume across all payers. The verified Medicare count above is the definitive, audited figure.
How Dr. Jahng Compares
Procedure volume compared to the California state average.
Volume Trend Analysis
Dr. Jahng's Medicare-recorded procedure volume has trended upward over 7 years, increasing 300% from 16 procedures in 2017 to 64 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.
Nutrition and Recovery After Joint ReplacementHow protein intake, anti-inflammatory foods, hydration, and targeted supplements support bone healing and tissue repair after surgery.
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. Jahng
How does Dr. Jahng's procedure volume compare to other California surgeons?
Dr. Jahng has performed 64 Medicare-verified joint replacement procedures. This is in line with the California average of 68 procedures per surgeon. Dr. Jahng ranks #214 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. Jahng perform?
Dr. Jahng's Medicare data shows procedures in knee replacement (41 cases) and hip replacement (23 cases).
Where is Dr. Jahng's practice located?
Dr. Jahng practices in Rancho Cucamonga, California. The office is located at 8805 Haven Ave, Rancho Cucamonga, CA 91730. Patients in the surrounding area can consult Dr. Jahng for joint replacement evaluation.
What does the Medicare data for Dr. Jahng represent?
The procedure counts shown are based on the most recent Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). This captures approximately 33–37% of all joint replacements performed nationally. Dr. Jahng's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 64 procedures shown here.
Has Dr. Jahng's procedure volume changed over time?
Yes. Dr. Jahng's Medicare-recorded volume has increased from 16 procedures in 2017 to 64 in the most recent data, a 300% increase over 7 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 64 procedures in 2024.
Does Dr. Jahng perform more than one type of joint replacement?
Yes. Dr. Jahng's Medicare data shows procedures in knee replacement (41 cases), hip replacement (23 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Jahng affiliated with?
According to CMS facility affiliation data, Dr. Jahng is affiliated with San Antonio Regional Hospital, Arrowhead Regional Medical Center.
What are the quality ratings for hospitals where Dr. Jahng practices?
San Antonio Regional Hospital (3 out of 5 CMS stars, insufficient case volume for complication rate comparison); Arrowhead Regional Medical Center (2 out of 5 CMS stars, insufficient case volume for complication rate comparison). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
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.