Dr. John Hamilton, MD
Contact & Location
Marshalltown, IA 50158
Dr. John Hamilton is a board-certified orthopedic surgeon practicing in Marshalltown, Iowa. A Medicare provider since 2007, Dr. Hamilton has performed 19 Medicare-verified knee replacements, ranking #71 in Iowa.
In Iowa, Dr. Hamilton performs below average in knee (19 vs 48 avg).
Dr. Hamilton's Medicare data shows a focused knee replacement practice with 19 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.
Dr. Hamilton is the only orthopedic surgeon in Marshalltown represented in the current Medicare dataset, serving as the primary local option for patients considering joint replacement surgery in the area.
Medicare records for Dr. Hamilton extend back to 2016, covering 5 years of data. Over that period, recorded procedure volume increased from 11 to 19 in the most recent data, a 73% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Hamilton's 19 knee replacement procedures is below the national average of 45 among 6,599 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. Hamilton Compares
Procedure volume compared to the Iowa state average.
Volume Trend Analysis
Dr. Hamilton's Medicare-recorded procedure volume has trended upward over 5 years, increasing 73% from 11 procedures in 2016 to 19 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.
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.
Rehabilitation Roadmap: Your Complete Recovery GuideA structured physical therapy progression from the first post-op exercises through full strength and mobility restoration over 3 to 6 months.
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.
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. Hamilton
How does Dr. Hamilton's procedure volume compare to other Iowa surgeons?
Dr. Hamilton has performed 19 Medicare-verified joint replacement procedures. The Iowa average is 73 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Hamilton ranks #95 out of 105 orthopedic surgeons in Iowa.
What types of joint replacement does Dr. Hamilton perform?
Dr. Hamilton's reported Medicare volume is focused on knee replacement, with 19 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Where is Dr. Hamilton's practice located?
Dr. Hamilton practices in Marshalltown, Iowa. The office is located at 421 E Merle Hibbs Blvd, Marshalltown, IA 50158. Patients in the surrounding area can consult Dr. Hamilton for joint replacement evaluation.
What does the Medicare data for Dr. Hamilton 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. Hamilton's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 19 procedures shown here.
Has Dr. Hamilton's procedure volume changed over time?
Yes. Dr. Hamilton's Medicare-recorded volume has increased from 11 procedures in 2016 to 19 in the most recent data, a 73% increase over 5 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 29 procedures in 2017.
Which hospitals is Dr. Hamilton affiliated with?
According to CMS facility affiliation data, Dr. Hamilton is affiliated with Unitypoint Health - Marshalltown.
What are the quality ratings for hospitals where Dr. Hamilton practices?
Unitypoint Health - Marshalltown (insufficient case volume for complication rate comparison). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
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.