Dr. Zachary Thielen
Contact & Location
Wailuku, HI 96793
Dr. Zachary Thielen is a board-certified orthopedic surgeon practicing in Wailuku, Hawaii. A Medicare provider since 2012, Dr. Thielen has performed 41 Medicare-verified knee replacements (#3 in Hawaii) and 37 hip replacements, for a combined total of 78 procedures.
In Hawaii, Dr. Thielen performs above average in knee (41 vs 33 avg), near average in hip (37 vs 33 avg).
Dr. Thielen's reported Medicare volume is split between knee replacements (41 cases) and hip replacements (37 cases).
Dr. Thielen is the only orthopedic surgeon in Wailuku represented in the current Medicare dataset, serving as the primary local option for patients considering joint replacement surgery in the area.
Dr. Thielen's Medicare data spans 4 years, beginning in 2018. Volume peaked at 105 procedures in 2018 before settling at 78 in the most recent data. Changes in Medicare reporting, payer mix shifts, or practice focus adjustments can all influence year-to-year volume.
Among 6,599 knee replacement surgeons tracked nationally, Dr. Thielen's 41 verified procedures is near the national average of 45.
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. Thielen Compares
Procedure volume compared to the Hawaii state average.
Volume Trend Analysis
Dr. Thielen's recorded volume peaked at 105 procedures in 2018 and stood at 78 in the most recent data. Year-to-year variation can reflect changes in payer mix, practice scope, or Medicare billing patterns.
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.
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.
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. Thielen
How does Dr. Thielen's procedure volume compare to other Hawaii surgeons?
Dr. Thielen has performed 78 Medicare-verified joint replacement procedures. This is in line with the Hawaii average of 57 procedures per surgeon. Dr. Thielen ranks #3 out of 14 orthopedic surgeons in Hawaii.
What types of joint replacement does Dr. Thielen perform?
Dr. Thielen's Medicare data shows procedures in knee replacement (41 cases) and hip replacement (37 cases).
How experienced is Dr. Thielen with knee replacement surgery?
Dr. Thielen ranks #3 in Hawaii for knee replacement with 41 Medicare-verified procedures. This high ranking among 14 state surgeons indicates significant experience with this specific procedure.
Where is Dr. Thielen's practice located?
Dr. Thielen practices in Wailuku, Hawaii. The office is located at 1830 Wells St Ste 103, Wailuku, HI 96793. Patients in the surrounding area can consult Dr. Thielen for joint replacement evaluation.
What does the Medicare data for Dr. Thielen 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. Thielen's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 78 procedures shown here.
Has Dr. Thielen's procedure volume changed over time?
Dr. Thielen's Medicare-recorded volume peaked at 105 procedures in 2018 and was 78 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. Thielen perform more than one type of joint replacement?
Yes. Dr. Thielen's Medicare data shows procedures in knee replacement (41 cases), hip replacement (37 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Thielen affiliated with?
According to CMS facility affiliation data, Dr. Thielen is affiliated with Maui Memorial Medical Center.
What are the quality ratings for hospitals where Dr. Thielen practices?
Maui Memorial Medical Center (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.
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.