CHFD: Denials, Days in AR, and a Coding Pattern That Looks Like a False Claims Act Problem

Denials, Days in AR, and a Coding Pattern That Looks Like a False Claims Act Problem

Cornerstone Medical Center is a 310-bed hospital with $520 million of net patient revenue. It closed the fiscal year at 58.4 days in accounts receivable against a 44-day target, a denial rate of 11.8% (6.2% two years earlier), and $4.1 million of denials written off in the fourth quarter alone. Sixty-two percent of inpatient denials cite medical necessity or level of care; only 70% of denials are ever worked; the average denial sits 21 days before anyone touches it; and appeals that are worked are overturned 44% of the time. Medicare Advantage now represents 31% of net revenue, and the dominant MA plan has proposed a three-year contract with increases of 2.5%, 2.5%, and 3.0%, a 5% quality withhold, and unchanged timely-filing rules; the hospital's own cost trend is 4.5% and the Medicare market basket is 3.1%. Separately, a clinical documentation integrity audit found that one employed surgeon's cases are coded to a higher-paying DRG 41% of the time on essentially unchanged documentation, and several physician query forms appear to have been completed in the surgeon's office rather than by the CDI specialist.

1. Quantify the denial and receivables opportunity and build a prioritized 90-day plan.

Read the worked answer

Quantify before you fix.

Cash locked in receivables: 14.4 excess days x ($520M / 365 = $1.425M per day) = roughly $20.5 million of cash to be released by reaching 44 days.
Unworked denials: 30% of $4.1M = $1.23M per quarter never touched. Applying the 44% historical overturn rate to that pool implies about $541,000 per quarter, or roughly $2.2 million annualized, of recoverable cash already being written off. Note the assumption: overturn rates on worked appeals may not hold for the untouched pool, so validate on a sample before setting a target.
The 62% medical-necessity share is the root cause. Every one-point reduction in the denial rate on $520M of revenue is about $5.2 million of gross charges protected, so the rate matters more than the appeal process.

Prioritized 90 days. Days 1-30: stop the bleeding. Stand up a denial triage queue sorted by dollar and filing deadline so nothing ages past timely filing; impose a 48-hour first-touch standard; suspend write-offs without supervisor approval. Days 15-60: attack medical necessity. Deploy a physician advisor reviewing every inpatient admission that fails InterQual/Milliman criteria before the claim drops; tighten the 2-midnight certification workflow; run case-management and CDI education on observation versus inpatient. Days 30-75: fix the front end. Real-time eligibility and benefits verification, prior-authorization tracking by payer and service line, and a registration quality scorecard by employee. Days 45-90: build the payer scorecard. Denials by payer, reason, dollar, and overturn rate, reviewed monthly with the MA plan's provider relations lead, with contractual appeal language invoked where the plan misses its own turnaround requirements.

Sequencing logic. Front-end fixes have the longest lag; the appeal recovery is immediate cash and funds the rest. Do not lead with headcount - lead with the physician advisor and the triage process, both of which use existing staff.

2. Evaluate the Medicare Advantage contract offer. Should Cornerstone sign, counter, or prepare to go out of network?

Read the worked answer

Size the offer. MA revenue is 31% x $520M = $161.2 million.

Year 1: +2.5% = +$4.03M, taking the base to $165.2M
Year 2: +2.5% = +$4.13M, to $169.4M
Year 3: +3.0% = +$5.08M, to $174.4M
Cumulative three-year increase: about $13.2M, or 8.2%

Compare to cost. A 4.5% annual cost trend compounds to 14.1% over three years. Revenue growth of 8.2% against cost growth of 14.1% is roughly a 5-6 point margin squeeze on a $161 million base - on the order of $8-9 million of margin over the term, before any withhold.

The withhold is the hidden term. A 5% quality withhold puts about $8.06 million at risk in year 1. If Cornerstone's historical performance on the plan's metrics is at or below target, model 60-100% of that as lost; if it consistently earns the withhold back, treat it as timing, not loss. Do not sign without knowing which.

Recommendation: counter, do not sign as offered and do not threaten to walk.

Ask for 3.0%/3.0%/3.5% and tie the escalation to the market basket rather than a fixed number.
Cap the withhold at a dollar amount or shorten the measurement lag; require transparency into the measure specifications and the attribution methodology.
Keep timely-filing and appeal terms unchanged only if the plan commits to a 30-day clean-claim payment standard with interest.

The leverage argument is real but bounded: 31% of revenue is a large block, and the plan needs this network for adequacy in the market. But going out of network converts a 2-point rate gap into a total loss of $161 million, which no hospital of this size absorbs. The credible move is to accept the term length, trade the withhold for rate, and start diversifying exposure.

3. What does the DRG pattern mean, and what must happen in the next 30 days?

Read the worked answer

What it means. A 41% DRG upgrade rate on unchanged documentation is not a documentation improvement; it is a coding pattern that produces claims the government and the plan will treat as false. Physician query forms completed in the surgeon's office - rather than by an independent CDI specialist and answered by the physician based on the record - removes the independence that makes a query defensible. This is potential False Claims Act exposure under 31 U.S.C. 3729, and it triggers the 60-day overpayment identification-and-return obligation under the Social Security Act once an overpayment is identified.

Next 30 days.

Stop the practice immediately. Queries originate from CDI, are answered by the physician, and the response must be supported by documentation in the record. No completed forms returned from physician offices.
Preserve evidence. Suspend any routine destruction; put a litigation hold on the relevant records and query forms.
Engage counsel now, before the internal review deepens, so the review is directed and privileged where appropriate.
Run a probe sample. Pull the surgeon's high-DRG cases for the past 12-24 months, have an independent coder and physician advisor re-review, and quantify the overpayment by DRG and date.
Quantify and plan repayment. Once identified, overpayments must be reported and returned within 60 days; evaluate voluntary self-disclosure to the OIG as a route to mitigate damages.
Escalate through governance. Report to the audit and compliance committee of the board and to the chief compliance officer, document the response, and confirm there is no retaliation against anyone who raised the concern.

The judgment to avoid: treating this as a coder training issue. The pattern, the rate, and the query handling together point to a billing integrity problem that needs legal direction, not just re-education.