Dr. Grigor Grigoryan, M.D.
Contact & Location
909-793-3311
Redlands, CA 92373
Colton, CA 92324
Loma Linda, CA 92354
Dr. Grigoryan performs more knee replacement procedures than 21% of orthopedic surgeons in California, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #387 of 491 ranked knee surgeons in California.
About Dr. Grigoryan
Practice. Dr. Grigor Grigoryan is a board-certified orthopedic surgeon practicing in Redlands, California. The latest annual CMS data records 17 knee replacements and 16 hip replacements, 33 procedures in all. That is #387 in California for knee replacement. A Medicare provider since 2013.
Trend. Medicare records run from 2018 to 2024, 4 years. Volume peaked at 69 in 2019 and stands at 33 now. Reporting changes and payer mix can both move that number.
National context. Among 6,612 knee replacement surgeons tracked nationally, 17 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. Redlands has 5 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 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 11 | 0 |
| 2019 | 35 | 34 |
| 2020 | 0 | 0 |
| 2021 | 11 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 16 | 17 |
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. Grigoryan Compares
Procedure volume compared to the California state average.
Volume Trend Analysis
Dr. Grigoryan's recorded volume peaked at 69 procedures in 2019 and stood at 33 in the most recent data. Year-to-year variation can reflect changes in payer mix, practice scope, or Medicare billing patterns.
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.
Home Safety: Creating Your Recovery SanctuaryRoom-by-room modifications, equipment recommendations, and fall-prevention strategies to prepare your home for a safe post-surgical recovery.
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. Grigoryan
How does Dr. Grigoryan's procedure volume compare to other California surgeons?
Dr. Grigoryan has performed 33 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. Grigoryan ranks #377 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. Grigoryan perform?
Dr. Grigoryan's Medicare data shows procedures in knee replacement (17 cases) and hip replacement (16 cases).
Are there other orthopedic surgeons near Dr. Grigoryan in Redlands?
Yes. There are 5 orthopedic surgeons in Redlands 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. Grigoryan 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. Grigoryan's total volume across all insurers at roughly 110 to 140 procedures against the 33 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. Grigoryan's procedure volume changed over time?
Dr. Grigoryan's Medicare-recorded volume peaked at 69 procedures in 2019 and was 33 in the most recent data. Volume fluctuations can reflect changes in payer mix, practice focus, or Medicare reporting rather than a change in overall surgical activity.
Does Dr. Grigoryan perform more than one type of joint replacement?
Yes. Dr. Grigoryan's Medicare data shows procedures in knee replacement (17 cases), hip replacement (16 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Grigoryan affiliated with?
According to CMS facility affiliation data, Dr. Grigoryan is affiliated with Los Robles Hospital & Medical Center, Redlands Community Hospital.
How does Dr. Grigoryan compare to other orthopedic surgeons in Redlands?
Among the 5 orthopedic surgeons in Redlands, Dr. Grigoryan ranks #2 by total Medicare procedure volume. Dr. Grigoryan is among the highest-volume surgeons in Redlands.
What are the quality ratings for hospitals where Dr. Grigoryan practices?
Los Robles Hospital & Medical Center (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Redlands Community Hospital (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 Redlands, California
Dr. Grigoryan's 33 Medicare procedures are above the Redlands average of 29. The table below compares verified procedure volumes for orthopedic surgeons practicing in Redlands.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Peter Elsissy | 71 | Hip, Knee |
| Dr. Jason Chan | 14 | Knee |
| Dr. Zachary Hadley | 14 | Shoulder |
| Dr. James Stewart | 12 | 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.