Dr. Jay Marumoto, MD
Contact & Location
Honolulu, HI 96814
Dr. Jay Marumoto is a board-certified orthopedic surgeon practicing in Honolulu, Hawaii. A Medicare provider since 2006, Dr. Marumoto has performed 32 Medicare-verified knee replacements, ranking #9 in Hawaii.
In Hawaii, Dr. Marumoto performs near average in knee (32 vs 33 avg).
Dr. Marumoto's Medicare data shows a focused knee replacement practice with 32 verified procedures. Surgeons who concentrate on a single procedure type often develop deep procedural expertise, though total practice volume may include additional procedures not captured in Medicare fee-for-service data.
Honolulu is home to 8 orthopedic surgeons in the current Medicare dataset. Patients in the Honolulu area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Marumoto extend back to 2013, covering 12 years of data. Over that period, recorded procedure volume increased from 20 to 32 in the most recent data, a 60% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Marumoto's 32 knee replacement procedures is below the national average of 45 among 6,599 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
Verified Case Volume Trends (2013-Current)
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. Marumoto Compares
Procedure volume compared to the Hawaii state average.
Volume Trend Analysis
Dr. Marumoto's Medicare-recorded procedure volume has trended upward over 12 years, increasing 60% from 20 procedures in 2013 to 32 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. Marumoto
How does Dr. Marumoto's procedure volume compare to other Hawaii surgeons?
Dr. Marumoto has performed 32 Medicare-verified joint replacement procedures. The Hawaii average is 57 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Marumoto ranks #12 out of 14 orthopedic surgeons in Hawaii.
What types of joint replacement does Dr. Marumoto perform?
Dr. Marumoto's reported Medicare volume is focused on knee replacement, with 32 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
How experienced is Dr. Marumoto with knee replacement surgery?
Dr. Marumoto ranks #9 in Hawaii for knee replacement with 32 Medicare-verified procedures. This high ranking among 14 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Marumoto in Honolulu?
Yes. There are 8 orthopedic surgeons in Honolulu 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 Hawaii surgeons.
What does the Medicare data for Dr. Marumoto 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. Marumoto's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 32 procedures shown here.
Has Dr. Marumoto's procedure volume changed over time?
Yes. Dr. Marumoto's Medicare-recorded volume has increased from 20 procedures in 2013 to 32 in the most recent data, a 60% increase over 12 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 34 procedures in 2023.
Which hospitals is Dr. Marumoto affiliated with?
According to CMS facility affiliation data, Dr. Marumoto is affiliated with The Queens Medical Center.
How does Dr. Marumoto compare to other orthopedic surgeons in Honolulu?
Among the 8 orthopedic surgeons in Honolulu, Dr. Marumoto ranks #7 by total Medicare procedure volume. The highest-volume surgeon in Honolulu has 119 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Marumoto practices?
The Queens Medical Center (3 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 Honolulu, Hawaii
Dr. Marumoto's 32 Medicare procedures are below the Honolulu average of 71. The table below compares verified procedure volumes for orthopedic surgeons practicing in Honolulu.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Cass Nakasone | 119 | Hip, Knee |
| Dr. Jeffery Harpstrite | 108 | Hip, Knee |
| Dr. Jason Kaneshige | 67 | Hip, Knee |
| Dr. Paul Morton | 65 | Hip, Knee |
| Dr. Joseph Varcadipane | 56 | Hip, Knee |
| Dr. Andrew Richardson | 52 | 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.