Dr. Harrison Mahon, MD

Orthopedic Surgery
12 procedures 1 hospital Fleming Island, FL
Latest available Medicare data — updated April 2026

Contact & Location

Phone: 904-161-9503
Practice phone listed in the NPI registry
1747 Baptist Clay Dr Ste 200
Fleming Island, FL 32003
NPI: 1477943579
Credentials: MD
Active Medicare provider (NPI verified)
11 years of practice experience
Licensed MD
Licensed surgical specialist
Board-certified orthopedic surgeon
Contact information available
Find Practice on Google Maps
Knee replacement recovery kit Ice machines, mobility aids, bathroom safety, all under $50
National Comparison by Procedure
Knee 12 vs 45 avg (6,599 surgeons)

Dr. Harrison Mahon is a board-certified orthopedic surgeon practicing in Fleming Island, Florida. A Medicare provider since 2015, Dr. Mahon has performed 12 Medicare-verified knee replacements, ranking #393 in Florida.

In Florida, Dr. Mahon performs below average in knee (12 vs 48 avg).

Dr. Mahon's Medicare data shows a focused knee replacement practice with 12 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.

Beyond general orthopedic surgery, Dr. Mahon holds additional credentials in Sports Medicine, reflecting subspecialty training that may benefit patients with complex joint conditions.

Fleming Island is home to 3 orthopedic surgeons in the current Medicare dataset. Patients in the Fleming Island area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.

Dr. Mahon first appears in the Medicare dataset in 2023. With 2 years of recorded data, the longitudinal trend is still developing.

Dr. Mahon's 12 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 Medicare Cases

Knee Replacement
12 verified cases
#393 in Florida
Estimated total: 30 – 40 procedures (all insurers)
Based on Medicare FFS representing 33–37% of national joint replacement volume
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. Mahon Compares

Procedure volume compared to the Florida state average.

Knee Below Avg
12 Avg: 48
Dr. Mahon Florida Average

Volume Trend Analysis

Dr. Mahon has 2 years of Medicare procedure data beginning in 2023. Additional years of data will provide a clearer picture of volume trends.

Years of Data 2
2024 Volume 12
Peak Volume 15 (2023)
Trend Developing

Hospital Affiliations & Quality

H
Baptist Medical Center Jacksonville
4/5
Jacksonville, FL
Similar to national avg

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:

Knee Replacement Recovery Overview

Recovery timelines vary by patient, but here is a general overview of what to expect after knee replacement surgery:

Week 1-2 Walking with assistive device. Knee bending exercises begin immediately. Ice therapy and elevation for swelling control.
Week 3-6 Increased range of motion (target 90 degrees). Walking longer distances. Physical therapy intensifies with strengthening exercises.
Week 7-12 Most patients walk without assistive devices. Resume driving and desk work. Continue PT for strength and flexibility.
Month 4-6 Near-full recovery. Resume most recreational activities. Some swelling and stiffness may persist but continues improving.

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. Mahon

How does Dr. Mahon's procedure volume compare to other Florida surgeons?

Dr. Mahon has performed 12 Medicare-verified joint replacement procedures. The Florida average is 72 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Mahon ranks #499 out of 523 orthopedic surgeons in Florida.

What types of joint replacement does Dr. Mahon perform?

Dr. Mahon's reported Medicare volume is focused on knee replacement, with 12 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.

Are there other orthopedic surgeons near Dr. Mahon in Fleming Island?

Yes. There are 3 orthopedic surgeons in Fleming Island 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 Florida surgeons.

What does the Medicare data for Dr. Mahon 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. Mahon's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 12 procedures shown here.

Which hospitals is Dr. Mahon affiliated with?

According to CMS facility affiliation data, Dr. Mahon is affiliated with Baptist Medical Center Jacksonville.

How does Dr. Mahon compare to other orthopedic surgeons in Fleming Island?

Among the 3 orthopedic surgeons in Fleming Island, Dr. Mahon ranks #3 by total Medicare procedure volume. Dr. Mahon is among the highest-volume surgeons in Fleming Island.

What are the quality ratings for hospitals where Dr. Mahon practices?

Baptist Medical Center Jacksonville (4 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 Fleming Island, Florida

Dr. Mahon's 12 Medicare procedures are below the Fleming Island average of 32. The table below compares verified procedure volumes for orthopedic surgeons practicing in Fleming Island.

SurgeonProceduresSpecialties
Dr. William Geisert 44 Hip, Knee
Dr. Aaron Bates 41 Shoulder

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.

Cite This Data

APA: OrthoProcedures. (2026). Dr. Harrison Mahon, MD -- Orthopedic Surgeon Profile. Retrieved from https://orthoprocedures.com/surgeons/fl/dr-harrison-mahon-fleming-island.html

Link: https://orthoprocedures.com/surgeons/fl/dr-harrison-mahon-fleming-island.html

Data source: CMS Medicare Part B Provider Utilization & Payment Data. Full methodology | Open Data API

Important: Rankings are based solely on Medicare procedure volume and do not reflect quality of care, patient outcomes, or procedures covered by private insurance. This data represents approximately one-third to 40% of all joint replacement procedures nationwide. Always consult with healthcare providers to make informed decisions about your care.