Why it matters in orthopedics

The gross collection rate depends heavily on how high you set your fee schedule, so it says little about billing performance. The net collection rate isolates what you lose after contracts: unappealed denials, timely-filing write-offs, missed underpayments and bad debt. Orthopedic practices also deal with workers’ comp fee schedules and personal-injury settlements, which need consistent adjustment codes or the rate stops meaning anything.

How to calculate it

Net collection rate = payments ÷ (charges − contractual adjustments) × 100

The AAFP calculates it as payments, net of credits, divided by charges net of approved contractual adjustments for the selected time frame. MGMA calls it the adjusted fee-for-service collection percentage, also known as the net collection percentage: net fee-for-service revenue divided by adjusted fee-for-service charges. AAOE’s version is net collections divided by net charges.

Because payments trail charges, build in a lag. For example, compare charges for January through June with payments posted through September, or use a trailing 12 months. Keep the window the same every time.

Only contracted reductions belong in the adjustments. Posting a denial, timely-filing or small-balance write-off as a contractual adjustment shrinks the denominator and inflates the rate.

Example: $3,420,000 in payments ÷ ($9,000,000 in charges − $5,400,000 in contractual adjustments) = 95.0%. The gross collection rate on the same numbers is 38.0%.

HFMA’s MAP Keys do not include a net collection rate. The closest key is Cash Collection as a Percentage of Net Patient Service Revenue (FM-2).

Orthopedic benchmark

The AAFP says the adjusted collection rate should be at least 95%, with 95% to 99% average and top performers at 99% or more. Those are general rules of thumb. The one public orthopedic figure we found is lower: AAOE reports that the average net collection ratio among practices in its benchmarking survey fell from 90.3% in 2020 to 86.8% in 2024. Differences in definitions and timing may explain part of the gap. Our orthopedic RCM benchmarks guide puts these figures in context.

What moves it

• Denials written off without appeal, which your denial rate shows first.

• Timely-filing and credentialing write-offs.

• Underpayments never compared with contracted rates.

• Patient balances that end up as bad debt.

• Adjustment codes used inconsistently.

• Workers’ comp and personal-injury reductions posted to the wrong category.

How to improve it

Load contracted fee schedules into your practice management system so payment variances surface automatically. Restrict who can post write-offs and require a reason for each. Review adjustment codes monthly, estimate and collect patient responsibility before surgery, and trend this metric with days in A/R so you judge speed and completeness together.