A California Eating Disorder Residential Program in A/R Had $487,000 Over 90 Days. We Recovered $401,000 in 5 Months.
Table of Contents
THE SITUATION
This 18-bed eating disorder residential program billed at high daily rates $1,200–$2,100 per day depending on payer. Claims were large. Denials were common. Concurrent review requirements were constant.
And the billing team, two people managing $380,000 in monthly volume, was keeping up with new claims while the 90+ day bucket grew unchecked.
By Q3 2024, the 90+ day A/R was $487,000. The CFO ran a recovery probability estimate internally and assumed 40% was collectible. We ran the same analysis and came back with 82%.
WHAT WAS ACTUALLY WRONG
Medical necessity appeals weren’t being filed denials were going straight to write-off:
Eating disorder residential denials from Cigna and UHC are routinely based on ‘lower level of care appropriate’ meaning they’re medical necessity denials. These are the most consistently overturned denials in behavioral health when appealed with clinical documentation. The billing team wasn’t filing appeals. They were writing off.
Concurrent review extensions were being missed on long stays:
Aetna and BCBS CA both require active concurrent review calls every 5–7 days for eating disorder residents. For stays over 30 days which is common in ED residential the review schedule becomes intensive. The billing coordinator was managing reviews for 18 active patients while also handling all other billing. Reviews were getting missed. Payers were terminating authorization mid-stay.
$114,000 in claims had incorrect diagnosis codes:
Eating disorder claims require specific ICD-10 specificity. Seven patients had been billed with F50.9 (Eating disorder, unspecified) when their clinical records documented F50.01 (Anorexia nervosa, restricting type) or F50.02 (Anorexia nervosa, binge/purge type). Several payers require specific AN subtypes for residential auth generic F50.9 was triggering denials.
WHAT WE DID
Week 1: Full A/R triage. Every claim is categorized by denial type, appeal window, and dollar value. Recovery probability assigned to each bucket.
Weeks 2–6: Filed medical necessity appeals for all Cigna and UHC ‘lower level of care’ denials, full clinical summaries, ASAM criteria mapping, weight restoration metrics, psychiatric acuity documentation, and attending physician statements.
Week 3: Assigned dedicated concurrent review tracking. All 18 active patients calendared by payer review schedule. Concurrent reviews conducted the same day with no exceptions.
Weeks 4–8: Corrected ICD-10 codes on all $114,000 in F50.9 claims. Re-submitted with correct AN subtype codes and supporting documentation.
Months 3–5: Worked remaining A/R systematically highest value, shortest remaining window first. BCBS CA and Aetna responded to corrected claims within 30–45 days.
THE RESULTS
| Metric | Before | After |
|---|---|---|
| 90+ Day A/R | $487,000 | $86,000 |
| Revenue Recovered | — | $401,000 |
| Medical Necessity Appeal Win Rate | 0% filed | 71% |
| ICD-10 Correction Recovery | — | $94,000 |
| Concurrent Review Compliance | Partial | 100% |
WHAT THIS MEANS FOR YOUR PRACTICE
Eating disorder residential delivers the highest per‑patient revenue in behavioral health and the most complex payer scrutiny. If your 90+ day A/R is growing and you’re not filing formal, clinically supported appeals, you’re likely missing 70–85% recovery on those dollars.