Dr. Loren Geller, M.D.
Contact & Location
818-952-0670
Glendale, CA 91208
Dr. Geller performs more knee replacement procedures than 14% of orthopedic surgeons in California, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #422 of 491 ranked knee surgeons in California.
About Dr. Geller
Practice. Dr. Loren Geller is a board-certified orthopedic surgeon practicing in Glendale, California. The latest annual CMS data records 15 knee replacements. That is #422 in California for knee replacement. A Medicare provider since 2007.
Trend. Medicare records run from 2014 to 2024, 8 years. Volume rose from 11 procedures a year to 15, up 36%.
National context. Among 6,612 knee replacement surgeons tracked nationally, 15 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. Glendale has 7 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 | Knee Replacement |
|---|---|
| 2013 | 0 |
| 2014 | 11 |
| 2015 | 0 |
| 2016 | 11 |
| 2017 | 15 |
| 2018 | 16 |
| 2019 | 23 |
| 2020 | 0 |
| 2021 | 0 |
| 2022 | 12 |
| 2023 | 22 |
| 2024 | 15 |
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. Geller Compares
Procedure volume compared to the California state average.
Volume Trend Analysis
Dr. Geller's Medicare-recorded procedure volume has trended upward over 8 years, increasing 36% from 11 procedures in 2014 to 15 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. Geller
How does Dr. Geller's procedure volume compare to other California surgeons?
Dr. Geller has performed 15 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. Geller ranks #529 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. Geller perform?
Dr. Geller's reported Medicare volume is focused on knee replacement, with 15 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Geller in Glendale?
Yes. There are 7 orthopedic surgeons in Glendale 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. Geller 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. Geller's total volume across all insurers at roughly 50 to 70 procedures against the 15 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. Geller's procedure volume changed over time?
Yes. Dr. Geller's Medicare-recorded volume has increased from 11 procedures in 2014 to 15 in the most recent data, a 36% increase over 8 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 23 procedures in 2019.
Which hospitals is Dr. Geller affiliated with?
According to CMS facility affiliation data, Dr. Geller is affiliated with Usc Verdugo Hills Hospital, Glendale Adventist Medical Center, Keck Hospital Of Usc.
How does Dr. Geller compare to other orthopedic surgeons in Glendale?
Among the 7 orthopedic surgeons in Glendale, Dr. Geller ranks #6 by total Medicare procedure volume. The highest-volume surgeon in Glendale has 72 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Geller practices?
Usc Verdugo Hills Hospital (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Glendale Adventist Medical Center (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Keck Hospital Of Usc (4 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 Glendale, California
Dr. Geller's 15 Medicare procedures are below the Glendale average of 38. The table below compares verified procedure volumes for orthopedic surgeons practicing in Glendale.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Vahan Cepkinian | 72 | Hip, Knee |
| Dr. Stephen Owens | 57 | Hip, Knee |
| Dr. Michael Abdulian | 42 | Hip, Knee |
| Dr. Philip Merritt | 41 | Hip |
| Dr. Sooren Karayan | 24 | Knee |
| Dr. Sevag Bastian | 13 | 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.