Dr. Mark Schamblin, M.D.
Contact & Location
818-901-6600
Van Nuys, CA 91405
Dr. Schamblin performs more shoulder replacement procedures than 22% of orthopedic surgeons in California, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #108 of 139 ranked shoulder surgeons in California.
About Dr. Schamblin
Dr. Mark Schamblin is a board-certified orthopedic surgeon practicing in Van Nuys, California. A Medicare provider since 2006, Dr. Schamblin performed 14 Medicare-verified shoulder replacements in the latest annual CMS data, ranking #108 in California.
In California, Dr. Schamblin performs below the state average in shoulder (14 vs 31).
Dr. Schamblin's Medicare data shows a focused shoulder replacement practice with 14 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.
Van Nuys is home to 7 orthopedic surgeons in the current Medicare dataset. Patients in the Van Nuys area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Schamblin extend back to 2018, covering 5 years of data. Over that period, recorded procedure volume increased from 11 to 14 in the most recent data, a 27% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Schamblin's 14 shoulder replacement procedures is below the national average of 29 among 2,217 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
Verified Case Volume Trends (2013-Current)
| Year | Shoulder Replacement |
|---|---|
| 2013 | 0 |
| 2014 | 0 |
| 2015 | 0 |
| 2016 | 0 |
| 2017 | 0 |
| 2018 | 11 |
| 2019 | 0 |
| 2020 | 11 |
| 2021 | 0 |
| 2022 | 14 |
| 2023 | 11 |
| 2024 | 14 |
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 29% to 37% for shoulder 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. Schamblin Compares
Procedure volume compared to the California state average.
Volume Trend Analysis
Dr. Schamblin's Medicare-recorded procedure volume has trended upward over 5 years, increasing 27% from 11 procedures in 2018 to 14 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 Shoulder Replacement
If you are considering shoulder replacement surgery, these evidence-based guides can help you prepare and recover:
A practical checklist of questions covering experience, technique, hospital choice, and recovery expectations to discuss during your surgical consultation.
Nutrition and Recovery After Joint ReplacementHow protein intake, anti-inflammatory foods, hydration, and targeted supplements support bone healing and tissue repair after surgery.
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.
Shoulder Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after shoulder replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full shoulder replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. Schamblin
How does Dr. Schamblin's procedure volume compare to other California surgeons?
Dr. Schamblin has performed 14 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. Schamblin ranks #550 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. Schamblin perform?
Dr. Schamblin's reported Medicare volume is focused on shoulder replacement, with 14 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Schamblin in Van Nuys?
Yes. There are 7 orthopedic surgeons in Van Nuys 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. Schamblin 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 29% to 37% for shoulder replacement, which puts Dr. Schamblin's total volume across all insurers at roughly 40 to 50 procedures against the 14 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. Schamblin's procedure volume changed over time?
Yes. Dr. Schamblin's Medicare-recorded volume has increased from 11 procedures in 2018 to 14 in the most recent data, a 27% increase over 5 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 14 procedures in 2022.
Which hospitals is Dr. Schamblin affiliated with?
According to CMS facility affiliation data, Dr. Schamblin is affiliated with Adventist Health Bakersfield.
How does Dr. Schamblin compare to other orthopedic surgeons in Van Nuys?
Among the 7 orthopedic surgeons in Van Nuys, Dr. Schamblin ranks #6 by total Medicare procedure volume. The highest-volume surgeon in Van Nuys has 268 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Schamblin practices?
Adventist Health Bakersfield (1 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 Van Nuys, California
Dr. Schamblin's 14 Medicare procedures are below the Van Nuys average of 62. The table below compares verified procedure volumes for orthopedic surgeons practicing in Van Nuys.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Jaime Hernandez | 268 | Hip, Knee |
| Dr. Michael Bahk | 62 | Shoulder |
| Dr. Todd Shapiro | 34 | Shoulder |
| Dr. Steve Kwak | 23 | Knee |
| Dr. Evan Vellios | 18 | Shoulder |
| Dr. Muzammil Memon | 13 | 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.