Dr. Musa Zaid, M.D.
Contact & Location
650-652-8290
Daly City, CA 94015
Dr. Zaid performs more knee replacement procedures than 60% of orthopedic surgeons in California, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #196 of 491 ranked knee surgeons in California.
About Dr. Zaid
Practice. Dr. Musa Zaid is an orthopedic surgeon practicing in Daly City, California. The latest annual CMS data records 38 knee replacements and 28 hip replacements, 66 procedures in all. That is #196 in California for knee replacement. A Medicare provider since 2015.
Trend. Medicare records run from 2021 to 2024, 4 years. Volume rose from 11 procedures a year to 66, up 500%.
National context. Among 6,612 knee replacement surgeons tracked nationally, 38 procedures is near the national average of 45.
Local context. Daly City has 2 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 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 11 |
| 2022 | 48 | 21 |
| 2023 | 20 | 0 |
| 2024 | 28 | 38 |
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. Zaid Compares
Procedure volume compared to the California state average.
Volume Trend Analysis
Dr. Zaid's Medicare-recorded procedure volume has trended upward over 4 years, increasing 500% from 11 procedures in 2021 to 66 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. Zaid
How does Dr. Zaid's procedure volume compare to other California surgeons?
Dr. Zaid has performed 66 Medicare-verified joint replacement procedures. This is in line with the California average of 68 procedures per surgeon. Dr. Zaid ranks #209 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. Zaid perform?
Dr. Zaid's Medicare data shows procedures in knee replacement (38 cases) and hip replacement (28 cases).
Are there other orthopedic surgeons near Dr. Zaid in Daly City?
Yes. There are 2 orthopedic surgeons in Daly City 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. Zaid 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. Zaid's total volume across all insurers at roughly 220 to 280 procedures against the 66 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. Zaid's procedure volume changed over time?
Yes. Dr. Zaid's Medicare-recorded volume has increased from 11 procedures in 2021 to 66 in the most recent data, a 500% increase over 4 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 69 procedures in 2022.
Does Dr. Zaid perform more than one type of joint replacement?
Yes. Dr. Zaid's Medicare data shows procedures in knee replacement (38 cases), hip replacement (28 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Zaid affiliated with?
According to CMS facility affiliation data, Dr. Zaid is affiliated with Mills-Peninsula Medical Center.
What are the quality ratings for hospitals where Dr. Zaid practices?
Mills-Peninsula Medical Center (5 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 Daly City, California
Dr. Zaid's 66 Medicare procedures are above the Daly City average of 45. The table below compares verified procedure volumes for orthopedic surgeons practicing in Daly City.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Philip Krueger | 24 | Hip |
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.