Funder
Commercial plan
Employer / marketplace coverage
Two disciplines, one roof, five rulebooks that never overlap
An employee-owned, multi-state pediatric therapy and special-education group runs ABA and physical therapy on a single EMR. The billing looks like one operation. It is really two rule systems and up to five funders competing for the same child's chart.
The answer
ABA-only billers cannot carry PT, and generalists know neither. The fix is not one biller who does both. It is one pediatric therapy billing services team that runs discipline-specific rulebooks in parallel, reconciles every funder against the same visit, and captures BCBA supervision that ABA-only shops leave on the floor.
Why one biller cannot cover both
The seam between ABA and PT is where revenue leaks
Figures below are illustrative industry benchmarks for a mixed ABA plus PT pediatric group, shown to size the problem. They are not any single organization's actuals.
5
Funder lanes one child can carry at once, each with its own rulebook
Illustrative
2
Distinct code systems: ABA 97153 vs 97155 and PT timed vs untimed CPT
Guideline-driven
≥5%
BCBA supervision (97155) recoverable when it is captured, not merged into RBT time
Recovered revenue
≥95%
ASP-RCM coding-accuracy standard held across both disciplines
ASP-RCM floor
The funding map
Five lanes, five rulebooks
One pediatric client can arrive with commercial insurance, a Medicaid managed-care plan, regional-center or DDS vendorization, and a school-district invoice, all attached to the same treatment week. Each lane pays on its own rules. Districts and LEAs are invoices, not claims, but they demand the same billing discipline.
LaneRulebook that governs itInstrument
01
Rulebook
Plan medical policy
Prior auth, plan-of-care recert cadence, unit caps per authorization
9715397155PT timed CPTInstrument
Claim (837P)
02
Funder
Medicaid managed care
State MCO / health plan
Rulebook
State Medicaid + MCO addendum
EPSDT rules, modifier and place-of-service edits, visit-limit and threshold logic distinct from commercial
ModifiersVisit limitsInstrument
Claim (837P)
03
Funder
Regional center / DDS
Vendorized service authorization
Rulebook
Vendorization agreement
Authorized service codes and rates set by the vendor contract, not the payer fee schedule; units tracked against the authorization, not a benefit
Vendor rateAuth unitsInstrument
Vendor billing
04
Funder
School district / LEA
IEP-driven special education
Rulebook
District contract + IEP
Service minutes and rates set by the district agreement; reconciled to IEP-mandated minutes, tracked by student and service line
Invoice lineIEP minutesInstrument
Invoice, not a claim
05
Funder
Out-of-network / family
OON benefits and private pay
Rulebook
Superbill + OON policy
Single-case agreements, superbills for family submission, self-pay ledger reconciled to coverage found later
SCASuperbillInstrument
Claim or superbill
Claims (lanes 01, 02, 05)
Adjudicated on payer medical policy. Governed by prior auth, plan-of-care recertification, modifiers, and unit caps. A denial has an appeal path and a filing clock.
Invoices (lanes 03, 04)
Regional-center vendorization and district or LEA billing are invoices, not claims. No 837, no clearinghouse. They still need auth tracking, rate accuracy, and reconciliation to authorized minutes, or the money never arrives.
ABA rulebook
RBT delivery vs BCBA supervision: 97153 vs 97155
The most common ABA leak is quiet. Direct adaptive behavior treatment by an RBT and supervision by a BCBA are separate codes. When supervision time is folded into direct-service time, the higher-value BCBA line never gets billed. For ABA content we say BCBAs and RBTs.
CPT 97153
Direct adaptive behavior treatment
Delivered by the RBT, one-to-one with the child, in 15-minute units against the authorization. This is the volume line, and it is usually captured well.
CPT 97155
Protocol modification / supervision
BCBA time directing the treatment protocol, often delivered alongside RBT service. Capturing at least 5% supervision as its own line turns documented BCBA hours into recovered revenue instead of unpaid oversight.
PT rulebook
The 8-minute rule is two rules, not one
An ABA biller has never touched a timed CPT unit. Physical therapy runs on the 8-minute rule, and the count differs by payer. Get the wrong one and every timed visit is either under-billed or an overpayment waiting to be clawed back.
Medicare method
Total timed minutes
- Sum all timed-code minutes in the visit, then divide the total by 15 to set the billable unit count.
- The 8-minute threshold applies to the combined remainder, not to each code on its own.
- Governs Medicaid and many managed-care lines that adopt the CMS method.
AMA / CPT method
Per-code timing
- Each timed CPT code is evaluated individually against its own 8-minute threshold.
- The same visit can produce a different unit count than the Medicare total-time method.
- Common on commercial plans, so the same PT session bills two ways depending on the lane.
Plan-of-care recert
PT plans of care require recertification on the payer's schedule. A lapsed recert denies the entire span of visits behind it.
Visit limits
Therapy visit caps vary by lane. Tracking them per authorization, per discipline, prevents billing past the ceiling.
2026 KX threshold
Once cumulative therapy costs cross the annual 2026 KX modifier threshold, the KX modifier attests medical necessity to continue. Miss it and continued care denies.
The reconciliation
A three-way match on every session
One child, one week, up to five funders. Before anything bills, the same session is matched three ways so the right lane pays for the right units under the right rulebook. No double-billing, no orphaned invoice.
A
Authorization
What each lane approved: units, dates, plan-of-care span, visit cap remaining.
B
Documentation
What was delivered: RBT vs BCBA, timed vs untimed minutes, IEP service minutes met.
C
Funder rulebook
How this lane pays: 8-minute method, modifier edits, vendor rate, or district contract.
Matched output
One clean claim or invoice per lane
The result
Shift the book left
When discipline-specific rulebooks are run correctly the first time, the aging book moves toward the current buckets. The dashed outline is a mixed-discipline starting shape; the solid bars are the target profile. Illustrative distribution, not a client actual.
Aging profile, before and after
Share of open receivables by age bucket across all five lanes. Moving the book left means cash arrives sooner and fewer dollars age past appeal and filing clocks.
0-30
31-60
61-90
91-120
120+
Before: mixed-discipline book
After: rulebook-correct, shifted left
Guidelines referenced
The rules this work is built on
ABA 97153 vs 97155
Direct adaptive behavior treatment by an RBT versus protocol modification and supervision by a BCBA, billed as distinct lines.
PT 8-minute rule
Medicare total-timed-minutes method versus AMA per-code timing, applied per lane so the same visit bills correctly everywhere.
Plan-of-care recertification
PT plans of care recertified on the payer schedule to keep the visit span payable.
Visit limits & 2026 KX threshold
Per-lane therapy caps tracked, and the 2026 KX modifier threshold applied so continued medically necessary care is not denied.
Multi-funder reconciliation
Commercial, Medicaid managed care, regional-center / DDS vendorization, and school-district / LEA invoices reconciled against the same session.
If your ABA and PT lines run on one EMR, they should not run on one rulebook
ASP-RCM Solutions runs pediatric therapy billing services as parallel discipline rulebooks with a single reconciliation layer, so commercial, Medicaid, vendorized, and district dollars all land, and BCBA supervision stops going unbilled. Coding accuracy held at 95% or higher across both disciplines.
Map your five lanes with our team →All figures on this page are illustrative industry benchmarks for a de-identified, employee-owned, multi-state pediatric therapy and special-education archetype. No real organization, client actuals, or protected health information is represented. Guideline names are cited for reference; billing is performed to each payer's and funder's current published rules.
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