Dr. William Parrish, MD
Dr. William Parrish is a board-certified orthopedic surgeon practicing in Lancaster, Pennsylvania. Dr. Parrish has performed 24 Medicare-verified knee replacements (#210 in Pennsylvania) and 17 hip replacements, for a combined total of 41 procedures.
In Pennsylvania, Dr. Parrish performs below average in knee (24 vs 45 avg), below average in hip (17 vs 34 avg).
Dr. Parrish's reported Medicare volume is split between knee replacements (24 cases) and hip replacements (17 cases).
Lancaster is home to 25 orthopedic surgeons in the current Medicare dataset. Patients in the Lancaster area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Dr. Parrish's Medicare data spans 11 years, beginning in 2013. Volume peaked at 72 procedures in 2014 before settling at 41 in the most recent data. Changes in Medicare reporting, payer mix shifts, or practice focus adjustments can all influence year-to-year volume.
Dr. Parrish's 24 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. Parrish Compares
Procedure volume compared to the Pennsylvania state average.
Contact & Location
Lancaster, PA 17601
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Parrish's recorded volume peaked at 72 procedures in 2014 and stood at 41 in the most recent data. Year-to-year variation can reflect changes in payer mix, practice scope, or Medicare billing patterns.
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.
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.
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. Parrish
How does Dr. Parrish's procedure volume compare to other Pennsylvania surgeons?
Dr. Parrish has performed 41 Medicare-verified joint replacement procedures. The Pennsylvania average is 63 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Parrish ranks #207 out of 388 orthopedic surgeons in Pennsylvania.
What types of joint replacement does Dr. Parrish perform?
Dr. Parrish's Medicare data shows procedures in knee replacement (24 cases) and hip replacement (17 cases).
Are there other orthopedic surgeons near Dr. Parrish in Lancaster?
Yes. There are 25 orthopedic surgeons in Lancaster 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 Pennsylvania surgeons.
What does the Medicare data for Dr. Parrish 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. Parrish's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 41 procedures shown here.
Has Dr. Parrish's procedure volume changed over time?
Dr. Parrish's Medicare-recorded volume peaked at 72 procedures in 2014 and was 41 in the most recent data. Volume fluctuations can reflect changes in payer mix, practice focus, or Medicare reporting rather than a change in overall surgical activity.
Does Dr. Parrish perform more than one type of joint replacement?
Yes. Dr. Parrish's Medicare data shows procedures in knee replacement (24 cases), hip replacement (17 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
How does Dr. Parrish compare to other orthopedic surgeons in Lancaster?
Among the 25 orthopedic surgeons in Lancaster, Dr. Parrish ranks #14 by total Medicare procedure volume. The highest-volume surgeon in Lancaster has 152 verified Medicare procedures.
Other Orthopedic Surgeons in Lancaster, Pennsylvania
Dr. Parrish's 41 Medicare procedures are below the Lancaster average of 107. The table below compares verified procedure volumes for orthopedic surgeons practicing in Lancaster.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Thomas Renz | 152 | Hip, Knee |
| Dr. Carl Becker | 118 | Hip, Knee, Shoulder |
| Dr. Gregory Tocks | 115 | Hip, Knee, Shoulder |
| Dr. David Gregory | 115 | Hip, Knee |
| Dr. Gary Zartman | 109 | Hip, Knee |
| Dr. Christopher Cooke | 102 | Hip, Knee |
Patient Reviews & Ratings
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