Two therapy groups with the same clinicians, the same rent, and the same number of sessions can have opposite results, and the difference is almost always who pays for the sessions. Payer mix is treated by most groups as something that happened — the contracts they signed when a referral source asked, the Medicaid plan they joined to serve a population, the regional center vendorization a clinician brought with them. It should be managed like any other financial variable, which starts with understanding how each payer type actually behaves.
Commercial insurance. Employer-sponsored and individual plans from national and regional carriers; contracted rates by procedure code negotiated per group, typically the highest insured reimbursement in a market but varying by 30 to 50 percent across carriers for the same code; authorization requirements that range from none for routine outpatient sessions to session limits and treatment-plan submissions; denial rates in the 5 to 12 percent range driven by eligibility, timely filing, and documentation; days to cash of 20 to 45; patient responsibility — copays, coinsurance, and deductibles — that has grown to a third or more of collected revenue in high-deductible plans and must be collected at the time of service; and the leverage to renegotiate that comes from network adequacy, access data, and outcome measures — commercial plans are where a group's payer file does its most valuable work.
Medicaid, fee-for-service and managed. State programs with reimbursement set by the state or by managed care organizations that administer the benefit; rates for outpatient behavioral health typically 30 to 60 percent below commercial for the same code, with wide variation by state and by managed care plan; authorization and documentation requirements that are often heavier — treatment plans, periodic reviews, specific credentialing of rendering providers, restrictions on which license types can bill which codes; denial rates often higher and driven by eligibility churn, since Medicaid members gain and lose coverage month to month; days to cash of 30 to 90 depending on plan; minimal or no patient responsibility, which simplifies collection but removes a revenue component; and a population that many groups serve by mission, which is a legitimate choice whose cost must be known — a group whose Medicaid volume grows unmanaged until payroll is at risk has not made a choice, it has drifted into one.
Medicare. The federal program for adults 65 and over and certain disabled adults, with a fee schedule that sits between Medicaid and commercial for most behavioral health codes, strict rules on which license types can bill — historically limiting many master's-level clinicians, with expansions in recent years for some license types — specific telehealth rules, and Medicare Advantage plans administered by private carriers with their own authorization and credentialing; a smaller share of most outpatient therapy groups' mix, but material for groups serving older adults, and administratively distinct enough to be its own payer category.
Regional centers and developmental-disability funding. In California, the regional center system funds services for individuals with developmental disabilities under the state's developmental-services law, with vendorized providers paid at rates set by the state's rate structure for services such as behavioral intervention, social-skills groups, and parent training; other states run analogous programs through Medicaid waivers and developmental-disability agencies; the economics differ in kind — authorization is by purchase-of-service agreement with defined units, documentation is service-specific and audited, rates are set rather than negotiated and change with state budget cycles, days to cash can exceed 60 with invoicing requirements that differ from insurance claims, and the client population is often long-term; groups serving this funding stream need a billing workflow built for it rather than adapted from insurance billing, and a finance function that tracks authorized units against delivered units by client because an overrun is unbillable.
Employee assistance programs. Employer-funded programs that refer employees for a capped number of free sessions — typically three to eight — paid to the provider at a flat rate that is frequently below the group's fully loaded cost per session, with the program handling intake and the provider handling the sessions and a referral to ongoing care when the cap is reached; the economics work only as a referral source — the conversion rate from capped sessions to insured or self-pay ongoing care must be tracked, and a group with a 20 percent conversion rate is running a loss-leading funnel it should price as such.
School and district contracts. School-based therapy, assessment, and consultation under contracts priced per diem, per session, per student, or as dedicated capacity; payment on district cycles that can run 60 to 120 days; summer gaps that leave dedicated clinicians under-utilized unless the contract or the group's own scheduling fills them; and strong predictability when the contract is priced correctly — which means fully loaded cost plus margin, with the summer gap addressed explicitly.
Self-pay and out-of-network. Clients paying the group's full fee at the time of service, often seeking reimbursement from an out-of-network benefit with a superbill; the highest net revenue per session, no authorization, no claim lag, no denial; demand-limited and market-sensitive — strong in some markets and thin in others; and the component that most groups should manage deliberately through pricing, superbill support, and clinician assignment rather than treat as whatever walks in.
Workers' compensation, auto liability, and crime-victim programs. Small in most groups, each with distinct authorization, documentation, and payment behavior; worth tracking separately because their rates are often favorable and their administrative burden is specific.
The three numbers to know for every payer type
Net revenue per completed session — cash collected divided by sessions delivered, from remittance data over a trailing period, not the contracted rate; the cost to collect — billing and administrative hours attributable to the payer's authorization, documentation, denial, and appeal burden, converted to dollars; and days to cash — the working-capital cost of each payer's payment behavior; a payer with a high contracted rate, heavy denials, and 70-day payment can net less than a modest payer that pays cleanly in 25.
Contribution by payer. Net revenue per session less clinician compensation as actually paid — which for percentage-split clinicians moves with the rate and for salaried clinicians does not — less allocated overhead, less the cost to collect; this is the number that ranks payers, and in most groups the ranking surprises the owner.
Eligibility churn and verification burden
Medicaid and managed-Medicaid members change plans and lose coverage frequently; groups with high Medicaid volume need eligibility re-verification at every visit or monthly, which is a billing-staff cost that belongs in the payer's cost to collect.
Credentialing by payer. Every clinician must be credentialed with each payer separately, with Medicaid plans and regional centers often requiring specific license types and additional documentation; a group's effective capacity for each payer is the number of clinicians credentialed with it, and the credentialing matrix is the operational face of payer mix.
Concentration risk
A group with 40 percent of revenue from one commercial carrier or one managed-Medicaid plan carries a risk that a rate change, a network decision, or a plan exit changes the year; concentration belongs in the management report with a plan above a threshold.
Managing the mix deliberately
Set a target mix by payer category based on contribution, cash timing, and mission; route new intakes toward the payers that support the economics, within the group's access commitments; renegotiate or exit commercial contracts below cost with a case built six months ahead of renewal; price school and employer contracts at fully loaded cost plus margin; decide what the group will subsidize — a Medicaid or regional-center population served by mission — and write the subsidy down as a decision with a cap; grow self-pay where the market supports it; and report actual mix against target monthly, with contribution by payer beside it.
The cash dimension
Payer mix is also the cash forecast — a shift of ten points from commercial to managed Medicaid can add fifteen to twenty-five days to the weighted days-to-cash and change the working-capital line a group needs; the 13-week forecast is built by payer for exactly this reason.
Why this is CFO work
The net-revenue-per-session analysis requires joining remittance, practice management, and payroll data; the cost-to-collect analysis requires timing the billing team's work by payer; the contract calendar and negotiation cases are finance deliverables; the mix target is a strategic decision with numbers behind it; and the subsidy decision is one the owners should make once a year with the cost in front of them, which is what the CFO brings to the table.
Worked example
A 20-clinician group, US$4.3 million net revenue, mixed salaried and percentage-split clinicians, serving seven payer types. The same 53-minute individual session, ranked:
| Payer type | Contracted / set rate | Net revenue per session | Days to cash | Cost to collect / session | Clinician cost (blended) | Allocated overhead | Contribution |
|---|---|---|---|---|---|---|---|
| Self-pay / out-of-network | US$175 | US$172 | 0 | US$2 | US$68 | US$38 | US$64 |
| Commercial carrier A | US$138 | US$124 | 24 | US$6 | US$68 | US$38 | US$12 |
| Workers' compensation | US$152 | US$139 | 48 | US$11 | US$68 | US$38 | US$22 |
| School district contract (per session) | US$115 | US$115 | 74 | US$4 | US$68 | US$38 | US$5 |
| Commercial carrier B | US$112 | US$96 | 41 | US$9 | US$68 | US$38 | −US$19 |
| Managed Medicaid plan | US$84 | US$77 | 58 | US$12 | US$68 | US$38 | −US$41 |
| Employee assistance program | US$70 | US$70 | 39 | US$3 | US$68 | US$38 | −US$39 (22% convert to ongoing care) |
Illustrative figures for a hypothetical organization; not a client's data.
Mix by sessions: self-pay 18 percent, carrier A 31, carrier B 19, managed Medicaid 17, school 8, workers' compensation 3, employee assistance 4. The group believed carrier B was "fine" because its contracted rate was close to carrier A's; the net after denials and cost to collect was US$28 lower, and the contract lost US$19 a session on 8,000 sessions a year — US$152,000. The managed-Medicaid line, served by mission, cost US$41 a session on 7,200 sessions — US$295,000 — which the owners had never seen as a number. The decisions: a negotiation case for carrier B at renewal in five months, with exit as the alternative; a written Medicaid subsidy decision capped at US$150,000 a year, with intake routing and a credentialing plan to hold the volume near 10 percent; the school contract repriced at renewal to US$132 with a summer-capacity clause; the employee assistance program kept as a referral source with a conversion target of 35 percent; and self-pay grown toward 25 percent through pricing and clinician assignment. Modeled effect on the same session volume: about US$310,000 of contribution improvement in the first full year, and weighted days to cash down from 38 to 31.