Cash-pay or insured visits: modeling collections without a universal rate
Operational worked example · Small outpatient physical therapy practice; two licensed PTs; retained leased medical suite; no home care
Model each payer as its own expected net receipt and payment timetable, then blend only after the units match. Gross billed charges are a management input, not revenue you can spend. The worked comparison uses explicitly assumed self-pay, commercial and Medicare visit totals; it claims no universal reimbursement rate. A choice to offer more cash visits also needs a demand test and review of coverage, participation and patient-notice obligations.
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Give each payer a separate row
For a real forecast, identify the actual contract, locality, coded service mix, patient responsibility, expected adjustments and collection history. Use a payer-plus-patient net total consistently; adding a copay to a total that already includes patient receipts overstates revenue. Keep unresolved contracts blank in the evidence register while using clearly labelled assumptions for an educational model.
The case assumes 30.0% self-pay, 55.0% commercial and 15.0% Medicare completed visits. The article follows one isolated cohort of 100 visits, completed in a single service month with no later services in this worksheet. Its payer rows are shown below. The original clinic still has a changing monthly schedule and many overlapping cohorts; this table does not replace its engine.
| Payer | Visits | Gross charge | Allowed proxy | Expected net total | Scope |
|---|---|---|---|---|---|
| Self-pay | 30 | $145.00 | $145.00 | $145.00 | At service |
| Commercial | 55 | $200.00 | $125.00 | $115.00 | Net realization includes payer and patient receipts |
| Medicare | 15 | $200.00 | $110.00 | $100.00 | Illustrative expected total, not a CMS national rate |
CMS rules concern actual therapy codes, coverage and payment adjustments. Our appointment proxies do not convert one visit into a fixed count of timed units, guarantee payer payment or establish a particular locality rate. Credentialing/enrollment and accepted documentation must be tested before insured volumes are financeable. Current therapy framework
Bridge billed, allowed and expected realized amounts
The cohort has $18,350.00 of gross charges, $12,875.00 of illustrative allowed amounts and $12,175.00 of expected realized net revenue. Contractual adjustments explain the first reduction; expected permanent noncollection explains the second. These expected losses are removed once at recognition in the model. Collectible unpaid balances remain receivables until their scheduled payment date.
The difference between net revenue and today’s receipts is therefore a timing question. A larger charge on a statement does not repair that gap. If a patient responsibility balance later proves uncollectible beyond the original estimate, update the expected realization and forecast rather than leaving both an optimistic receivable and an expense that counts the same loss twice.
For a real practice, keep remittance vintage, contract/version and service mix with each observation. A previous national average or another practice’s reimbursement total is not your contracted price. The model assumption record identifies the unreceived contract evidence, so its repeated net fee remains an assumption wherever it appears.
Follow this cohort into cash without creating new revenue
The self-pay assumption collects in the service month. Commercial net revenue collects 10.0% then, 55.0% one month later, 30.0% two months later and 5.0% three months later. Medicare collects 70.0% one month later and 30.0% two months later. These weights are timing hypotheses, not prompt-payment laws, actual claims experience or payer guarantees.
| Receipt period | Cash received | Remaining receivable | What the money represents |
|---|---|---|---|
| Service month | $4,982.50 | $7,192.50 | Cash visits plus first commercial installment |
| One month later | $4,528.75 | $2,663.75 | Commercial and Medicare vintage receipts |
| Two months later | $2,347.50 | $316.25 | Commercial and Medicare vintage receipts |
| Three months later | $316.25 | None remaining | Last commercial installment; not new service revenue |
The four cash installments sum to $12,175.00, exactly the cohort’s recognized net revenue. The outstanding balance falls as cash arrives; collecting it does not create another visit or another sale. Meanwhile clinician pay, rent and billed support costs follow their own payment calendar. The reference model uses the same vintage logic across all 60 months and preserves its negative base cash position.
Test delayed remittances separately from permanent denials. Moving a receipt to a later month changes cash and receivables without changing service-month earnings. Lower allowed amounts or lower collection realization change earnings too. The lower scenario applies both stresses explicitly; adding generic receivable days to these same receipt weights would double-count delay.
Compare contribution at the same completed volume first
At 100 mixed-payer visits, variable-expense contribution is $11,175.00 before salaries and occupancy. If the same number of eligible self-pay visits actually completed at the assumed cash fee, revenue would be $14,500.00 and contribution $13,665.00 after supplies and card fees, with no outsourced insured-billing fee. The paid clinician roster would still cost the same under this comparison.
That does not show the all-cash practice will sell the same volume. At $136.65 contribution per cash visit, it needs 81.8 completed cash visits to match the original mixed cohort’s contribution. A worksheet of 80 visits produces $10,932.00, while 82 produces $11,205.30. Check whole appointment counts at the decision boundary, then add any changed marketing/admin cost and demand constraint.
Patients who rely on insurance may not convert to private payment at the same fee or frequency. Measure requests, booking conversion and retention under the actual offer; this article invents no willingness-to-pay evidence. The comparison holds clinical duration fixed and makes no assumption that more private payment creates more therapist minutes.
Keep the payment offer within the actual rules
In California, lawful direct access does not oblige an insurer to pay. Review the selected patients, continuation conditions, enrollment and contracts with the practice’s advisers. The cash bucket here covers an explicitly defined self-pay assumption; it does not override Medicare covered-service rules or imply permission for a blanket private-payment arrangement. State access/coverage distinction; Therapy payment framework
CMS also explains expected-charge estimates for patients not using insurance. Confirm applicable estimate/notice procedures before making a cash offer, and keep the quoted scope and likely course of care clear. A spreadsheet price is not a compliant notice or proof that a specific service can be privately billed. Self-pay estimate guidance
Choose the mix using evidence and liquidity together
Prepare a payer register with effective enrollment date, contract and code mix, patient responsibility, expected net realization, receipt vintage, billing fee and unresolved balance follow-up. Keep gross charges, earned net revenue and bank receipts in separate columns. A billing system report and a bank deposit list answer different questions; reconcile them rather than selecting whichever total makes the business look stronger.
Read the three-scenario cash guide before turning a contribution comparison into a launch decision. The funding guide identifies the uncovered reserve and project evidence. The clinic overview states the narrow format, jurisdiction and pending owner-generated plan. Actual payer terms and demand should replace these assumptions together, with a new model run and reconciled statements.
Sources and scope
- Case assumptions and existing planning-case methodology · Checked 2026-10-05 · Author-selected outpatient case. No signed lease, patient referrals, insurer contract or project quotation. All case rates, mix, demand and timing remain assumptions.
- CMS Therapy Services — CY2026 updates · Checked 2026-10-05 · Outpatient therapy coding/payment framework; current page discusses 2026 updates, KX and MPPR. No locality/CPT/modifier fee calculation performed; modeled Medicare visit receipts are assumptions.
- California Business and Professions Code 2620.1 · Checked 2026-10-05 · California direct-access treatment; effective January 1, 2023 amendment displayed. Selected adult outpatient treatment excludes the wellness and education-plan exceptions.
- CMS medical bill rights when not using insurance · Checked 2026-10-05 · Uninsured/self-pay good-faith estimate information. Does not authorize private contracts for otherwise covered Medicare services.