Dr. Donald Longjohn, M.D.
Dr. Donald Longjohn is a board-certified orthopedic surgeon practicing in Los Angeles, California. A Medicare provider since 2006, Dr. Longjohn has performed 32 Medicare-verified knee replacements (#230 in California) and 17 hip replacements, for a combined total of 49 procedures.
In California, Dr. Longjohn performs below average in knee (32 vs 45 avg), below average in hip (17 vs 41 avg).
Dr. Longjohn's reported Medicare volume is split between knee replacements (32 cases) and hip replacements (17 cases).
Los Angeles is home to 34 orthopedic surgeons in the current Medicare dataset. Patients in the Los Angeles area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Dr. Longjohn's Medicare record spans 11 years from 2013 through 2023. Procedure volume has remained consistent during that period, ranging from 38 to 64 procedures per year, reflecting a steady joint replacement practice.
Dr. Longjohn's 32 knee replacement procedures is below the national average of 45 among 6,720 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
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. Longjohn Compares
Procedure volume compared to the California state average.
Contact & Location
Los Angeles, CA 90033
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Longjohn's procedure volume has been consistent across 11 years of Medicare data, ranging from 38 to 64 procedures per year. This stability suggests a well-established joint replacement practice.
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. Longjohn
How does Dr. Longjohn's procedure volume compare to other California surgeons?
Dr. Longjohn has performed 49 Medicare-verified joint replacement procedures. The California average is 65 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Longjohn ranks #268 out of 608 orthopedic surgeons in California.
What types of joint replacement does Dr. Longjohn perform?
Dr. Longjohn's Medicare data shows procedures in knee replacement (32 cases) and hip replacement (17 cases).
Are there other orthopedic surgeons near Dr. Longjohn in Los Angeles?
Yes. There are 34 orthopedic surgeons in Los Angeles 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. Longjohn 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. Longjohn's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 49 procedures shown here.
Has Dr. Longjohn's procedure volume changed over time?
Dr. Longjohn's procedure volume has been relatively stable over 11 years of Medicare data, ranging from 38 to 64 procedures per year between 2013 and 2023. Consistent volume over multiple years reflects a steady joint replacement practice.
Does Dr. Longjohn perform more than one type of joint replacement?
Yes. Dr. Longjohn's Medicare data shows procedures in knee replacement (32 cases), hip replacement (17 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Longjohn affiliated with?
According to CMS facility affiliation data, Dr. Longjohn is affiliated with Keck Hospital Of Usc, Lac/Rancho Los Amigos National Rehabilitation Ctr, Usc Kenneth Norris Jr Cancer Hospital, Glendale Adventist Medical Center.
How does Dr. Longjohn compare to other orthopedic surgeons in Los Angeles?
Among the 34 orthopedic surgeons in Los Angeles, Dr. Longjohn ranks #13 by total Medicare procedure volume. The highest-volume surgeon in Los Angeles has 198 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Longjohn practices?
Keck Hospital Of Usc (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Lac/Rancho Los Amigos National Rehabilitation Ctr (3 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 Los Angeles, California
Dr. Longjohn's 49 Medicare procedures are below the Los Angeles average of 103. The table below compares verified procedure volumes for orthopedic surgeons practicing in Los Angeles.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Daniel Oakes | 198 | Hip, Knee |
| Dr. John Tiberi | 172 | Hip, Knee |
| Dr. Andrew Spitzer | 91 | Hip, Knee |
| Dr. Vishal Hegde | 83 | Hip, Knee |
| Dr. Micah Adamson | 65 | Hip, Knee |
| Dr. Paul Gilbert | 65 | Hip, Knee |
Patient Reviews & Ratings
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