Dr. Petrella, Dr. Keen, & Dr. Locker are Top Ranked Physicians treating Osteoarthritis patients in Marion County, Florida, based on Experience and Patient Volume


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By: Sharath Joji  Jun. 17, 2022

Dexur’s analysis of Medicare claims volumes shows that Dr. Andrew J Petrella, Dr. Christopher Aaron Keen, & Dr. Joseph R Locker are the top three Physicians for Osteoarthritis in the county of Marion, Florida based on patient volume. Research has shown that case volume is positively correlated with better outcomes. Dexur is an approved purchaser of CMS claims data which it uses to produce data-driven rankings and research. Dexur's data is trusted by healthcare leaders, media and top academic institutions such as Harvard, with which it has published several academic papers.

Dexur's ranking is formulated based on an analysis of patient volume for each physician for Osteoarthritis in the county of Marion, FL. Physicians with more than 11 hospitalizations between Jan 2021 to Dec 2021 were considered for the study. The table below shows the top ranking physicians in Marion and their unique patient count data:

Physician Unique Patient Count Marion County Rank
Dr. Andrew J Petrella 870 1
Dr. Christopher Aaron Keen 705 2
Dr. Joseph R Locker 678 3
Dr. Cynthia R Harding
Dr. Walter I Choung
Dr. Eric W Hirsch
Dr. Marc J Rogers
Dr. James Bradford Duke
Dr. Timothy John Van De Leur
Dr. Derek J Farr

Dr. Andrew J Petrella is an Orthopaedic Surgeon from Lecanto, Florida, affiliated with Citrus Orthopaedic And Joint Institute and The Orthopaedic Institute. Dr. Petrella received his medical degree from University Of Pennsylvania, Philadelphia, in 1996 and has been in practice for more than 21 years. He is certified in Orthopaedic Surgery by the American Board of Orthopaedic Surgery since 2003. Dr. Petrella provided treatment to 870 unique patients, highest for any Physician for Osteoarthritis in Marion, making him the top ranked Physician in Dexur’s Ranking.

Dr. Christopher Aaron Keen is an Orthopaedic Surgeon from Lecanto, Florida affiliated with Citrus Orthopaedic And Joint Institute and The Orthopaedic Institute. He received his medical degree from Virginia Commonwealth University School of Medicine, Richmond, VA and has been in practice for more than 11 years. He is Board Certified with the American Board of Orthopaedic Surgery. Dr. Keen provided treatment to 705 unique patients, second highest among Physicians for Osteoarthritis in Marion, making him the second ranked Physician in Dexur’s Ranking.

Dr. Joseph R Locker is an Orthopaedic Surgeon from Ocala, Florida. He is affiliated with The Orthopaedic Institute. Dr Locker received his medical degree from Georgetown University School of Medicine and has been practicing for more than 21 years. Dr. Locker provided treatment to 678 unique patients, third highest among Osteoarthritis Physicians in Marion County, making him the third ranked Physician in Dexur’s Ranking.

Dexur provides National, State, and County-wise reports based on various ranking cohorts. Dexur’s ranking reports are used by Physicians, Hospitals, Life Sciences companies and other Healthcare organizations to analyze their performance and generate customized reports. Please reach out to us at dexur@gridlex.com for a complete ranking report.