Dr. Glen O'sullivan, M.D.
Contact & Location
Mount Shasta, CA 96067
Dr. Glen O'sullivan is a board-certified orthopedic surgeon practicing in Mount Shasta, California. Dr. O'sullivan has performed 16 Medicare-verified hip replacements, ranking #279 in California.
In California, Dr. O'sullivan performs below average in hip (16 vs 41 avg).
Dr. O'sullivan's Medicare data shows a focused hip replacement practice with 16 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.
Mount Shasta is home to 2 orthopedic surgeons in the current Medicare dataset. Patients in the Mount Shasta area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs. Dr. O'sullivan also maintains hospital privileges in CA and OR, indicating a regional practice that extends beyond California.
Medicare records for Dr. O'sullivan extend back to 2016, covering 6 years of data. Over that period, recorded procedure volume increased from 12 to 16 in the most recent data, a 33% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. O'sullivan's 16 hip replacement procedures is below the national average of 36 among 4,532 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
Verified Case Volume Trends (2013-Current)
Verified Medicare Cases
How is this estimated?
Medicare Part B fee-for-service claims represent approximately 33–37% of all joint replacements performed nationally (source: CMS data, AJRR). This range estimates the surgeon's total practice volume across all payers. The verified Medicare count above is the definitive, audited figure.
How Dr. O'sullivan Compares
Procedure volume compared to the California state average.
Volume Trend Analysis
Dr. O'sullivan's Medicare-recorded procedure volume has trended upward over 6 years, increasing 33% from 12 procedures in 2016 to 16 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 Hip Replacement
If you are considering hip replacement surgery, these evidence-based guides can help you prepare and recover:
Understanding the progression from conservative treatments to surgical intervention, and how to determine when hip replacement becomes the right choice.
What to Expect on the Day of SurgeryA step-by-step walkthrough of your surgical day, from pre-op preparation through anesthesia, the procedure itself, and the first hours of recovery.
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.
Medicare Coverage for Joint ReplacementWhat Medicare Part A and Part B cover for joint replacement surgery, including hospital stays, surgeon fees, anesthesia, and physical therapy.
Hip Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after hip replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full hip replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. O'sullivan
How does Dr. O'sullivan's procedure volume compare to other California surgeons?
Dr. O'sullivan has performed 16 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. O'sullivan ranks #504 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. O'sullivan perform?
Dr. O'sullivan's reported Medicare volume is focused on hip replacement, with 16 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. O'sullivan in Mount Shasta?
Yes. There are 2 orthopedic surgeons in Mount Shasta 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. O'sullivan represent?
The procedure counts shown are based on the most recent Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). This captures approximately 33–37% of all joint replacements performed nationally. Dr. O'sullivan's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 16 procedures shown here.
Has Dr. O'sullivan's procedure volume changed over time?
Yes. Dr. O'sullivan's Medicare-recorded volume has increased from 12 procedures in 2016 to 16 in the most recent data, a 33% increase over 6 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 16 procedures in 2024.
Which hospitals is Dr. O'sullivan affiliated with?
According to CMS facility affiliation data, Dr. O'sullivan is affiliated with Mercy Medical Center Mt Shasta, Asante Ashland Community Hospital, Fairchild Medical Center, Asante Rogue Regional Medical Center, Asante Three Rivers Medical Center. Dr. O'sullivan maintains hospital privileges across state lines, indicating a practice that serves patients in multiple states.
What are the quality ratings for hospitals where Dr. O'sullivan practices?
Mercy Medical Center Mt Shasta (3 out of 5 CMS stars, insufficient case volume for complication rate comparison); Asante Ashland Community Hospital (insufficient case volume for complication rate comparison); Fairchild Medical Center (1 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 Mount Shasta, California
Dr. O'sullivan's 16 Medicare procedures are below the Mount Shasta average of 31. The table below compares verified procedure volumes for orthopedic surgeons practicing in Mount Shasta.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Todd Guthrie | 45 | Hip, 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.