Dr. Christopher Ninh, M.D.

Dr. Ninh has performed 48 Medicare-verified joint replacement procedures. The California average is 68 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Ninh ranks #280 out of 613 orthopedic surgeons in California.

Dr. Ninh's reported Medicare volume is focused on knee replacement, with 48 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.

Dr. Ninh's current practice address is in Irvine, CA. That address is the current practice address in Dr. Ninh's own CMS NPPES registry entry, which providers maintain themselves. The Medicare claims data used for the rankings on this page was billed from Fountain Valley, California.

The procedure counts shown are based on 2024 Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). Medicare fee-for-service is only one payer stream, and the share of national volume it represents differs by procedure. In 2024 the share was 23% to 28% for knee replacement, which puts Dr. Ninh's total volume across all insurers at roughly 170 to 210 procedures against the 48 verified here. Those shares are derived from published national volume projections rather than quoted from a single publication, and they are estimates with real uncertainty. The OrthoProcedures methodology page shows the full derivation, the sources, and the limits at orthoprocedures.com/data-methodology.html.

Yes. Dr. Ninh's Medicare-recorded volume has increased from 23 procedures in 2013 to 48 in the most recent data, a 109% increase over 12 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 53 procedures in 2022.

According to CMS facility affiliation data, Dr. Ninh is affiliated with Uci Health-Orange, Memorialcare Orange Coast Medical Center, Chapman Global Medical Center, Providence St. Joseph Hospital, Hoag Memorial Hospital Presbyterian.

Among the 6 orthopedic surgeons in Fountain Valley, Dr. Ninh ranks #2 by total Medicare procedure volume. Dr. Ninh is among the highest-volume surgeons in Fountain Valley.

Uci Health-Orange (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Memorialcare Orange Coast Medical Center (3 out of 5 CMS stars, insufficient case volume for complication rate comparison); Chapman Global Medical Center (1 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.