Dr. Robert Montgomery, M.D.
Contact & Location
949-586-3200
Laguna Woods, CA 92637
Dr. Montgomery performs more knee replacement procedures than 72% of orthopedic surgeons in California, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #137 of 491 ranked knee surgeons in California.
About Dr. Montgomery
Practice. Dr. Robert Montgomery is a board-certified orthopedic surgeon practicing in Laguna Woods, California. The latest annual CMS data records 51 knee replacements. That is #137 in California for knee replacement. A Medicare provider since 2005.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume rose from 24 procedures a year to 51, up 113%.
National context. Among 6,612 knee replacement surgeons tracked nationally, 51 procedures is near the national average of 45.
Local context. Laguna Woods has 3 orthopedic surgeons in the current Medicare data. Comparing volume and procedure mix across them is one way to narrow a shortlist.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement |
|---|---|---|
| 2013 | 0 | 24 |
| 2014 | 0 | 24 |
| 2015 | 11 | 33 |
| 2016 | 29 | 56 |
| 2017 | 23 | 55 |
| 2018 | 22 | 50 |
| 2019 | 23 | 60 |
| 2020 | 17 | 46 |
| 2021 | 16 | 57 |
| 2022 | 18 | 54 |
| 2023 | 21 | 41 |
| 2024 | 0 | 51 |
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. 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. Montgomery Compares
Procedure volume compared to the California state average.
Volume Trend Analysis
Dr. Montgomery's Medicare-recorded procedure volume has trended upward over 12 years, increasing 113% from 24 procedures in 2013 to 51 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.
Questions to Ask Your Surgeon Before Joint ReplacementA practical checklist of questions covering experience, technique, hospital choice, and recovery expectations to discuss during your surgical consultation.
Pain Management After Joint ReplacementA comprehensive guide to managing post-surgical pain through medication, physical therapy, cold therapy, and non-pharmacological strategies.
Outpatient Joint Replacement: A Medicare GuideHow outpatient joint replacement works under Medicare, including eligibility criteria, cost differences, and what to expect with same-day discharge.
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. Montgomery
How does Dr. Montgomery's procedure volume compare to other California surgeons?
Dr. Montgomery has performed 51 Medicare-verified joint replacement procedures. The California average is 68 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Montgomery ranks #265 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. Montgomery perform?
Dr. Montgomery's reported Medicare volume is focused on knee replacement, with 51 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Montgomery in Laguna Woods?
Yes. There are 3 orthopedic surgeons in Laguna Woods 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 California surgeons.
What does the Medicare data for Dr. Montgomery 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, which puts Dr. Montgomery's total volume across all insurers at roughly 180 to 220 procedures against the 51 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. Montgomery's procedure volume changed over time?
Yes. Dr. Montgomery's Medicare-recorded volume has increased from 24 procedures in 2013 to 51 in the most recent data, a 113% increase over 12 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 85 procedures in 2016.
Which hospitals is Dr. Montgomery affiliated with?
According to CMS facility affiliation data, Dr. Montgomery is affiliated with Memorialcare Saddleback Medical Center.
How does Dr. Montgomery compare to other orthopedic surgeons in Laguna Woods?
Among the 3 orthopedic surgeons in Laguna Woods, Dr. Montgomery ranks #2 by total Medicare procedure volume. Dr. Montgomery is among the highest-volume surgeons in Laguna Woods.
What are the quality ratings for hospitals where Dr. Montgomery practices?
Memorialcare Saddleback Medical Center (4 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.
Other Orthopedic Surgeons in Laguna Woods, California
Dr. Montgomery's 51 Medicare procedures are below the Laguna Woods average of 61. The table below compares verified procedure volumes for orthopedic surgeons practicing in Laguna Woods.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Abraham Kim | 92 | Hip, Knee |
| Dr. Ari Youderian | 39 | Shoulder |
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.