Incident-To and Supervised Billing in Behavioral Health

Incident-to billing is a Medicare mechanism, defined in federal regulation at 42 CFR 410.26.

It lets a Medicare-enrolled practitioner bill services and supplies furnished by staff as if the practitioner had furnished them personally: the work of CMS's "auxiliary personnel" — any individual acting under the practitioner's supervision who meets the applicable state requirements — goes out under the practitioner's name and billing number.

For a behavioral health employer, that is the formal version of "billed under the supervisor."

Who may do the billing is a narrow list, and CMS's Medicare & Mental Health Coverage manual (MLN1986542, updated March 2026) states it plainly: "Physicians and specifically CPs, NPs, CNSs, CNMs, and PAs can bill and be paid for these integral, although incidental, services and supplies provided by auxiliary personnel as if they provided the services and supplies themselves if all the incident to requirements are met."

CP is clinical psychologist.

Those six practitioner types are the entire list.

The same manual's sections for marriage and family therapists, mental health counselors and clinical social workers each say: "We don't cover services provided incident to your personal professional services."

The bar sits on the services those clinicians personally furnish: nothing can be billed incident to an LCSW's, LPC's or LMFT's own professional services, however well the supervision is documented.

Ownership itself does not decide eligibility — a practice owned by one of them can still use incident-to where it also employs a qualifying practitioner, billing incident to an employed NP's services, for example.

Until January 1, 2024, incident-to was the only Medicare route for counselors and MFTs; since that date, clinicians who meet Medicare's MFT and MHC definitions can enroll and bill under their own numbers.

That associate-side picture — why a pre-licensed clinician generally has no billing number of their own, and what the mechanism means for their pay — is covered in can an associate therapist bill insurance?

This page is the employer's side of it: what the arrangement requires, and when it exists at all.

The regulation's opening words set the default: "In general, services and supplies must be furnished under the direct supervision of the physician (or other practitioner)."

It then sets the behavioral-health exception: "Behavioral health services can be furnished under general supervision of the physician (or other practitioner) when these services or supplies are provided by auxiliary personnel incident to the services of a physician (or other practitioner)" — 42 CFR 410.26(b)(5).

The change was finalized in the CY 2023 Physician Fee Schedule final rule and took effect January 1, 2023.

General supervision is defined in the same regulation: the service is furnished under the practitioner's "overall direction and control," but their "presence is not required during the performance of the service."

CMS's manual gives the practical version: "the physician or NPP may be contacted by phone, if necessary."

The regulation is also explicit about who bills: the supervising practitioner "need not be the same physician (or other practitioner) who is treating the patient more broadly," but "only the supervising physician (or other practitioner) may bill Medicare for incident to services."

Watch the date, because two changes a year apart are routinely merged into one.

The general-supervision rule took effect January 1, 2023 (CY 2023 Physician Fee Schedule final rule, 87 FR 69546).

January 1, 2024 is a different change — the date MFTs and mental health counselors could first enroll in Medicare under their own numbers, from the CY 2024 rule.

CMS also left the covered work deliberately broad.

"We do not define behavioral health services by HCPCS codes," the 2023 rulemaking states; the agency "generally understand[s] a behavioral health service to be any service furnished for the diagnosis, evaluation, or treatment of a mental health disorder, including substance use disorders (SUD)."

General supervision is one condition among several.

CMS's Medicare & Mental Health Coverage manual lists the rest, and each is a compliance requirement, not a suggestion.

Services and supplies must be "integral to the patient's normal treatment course."

The physician or other listed non-physician practitioner must have "personally provided an initial service to which the auxiliary personnel's services are incidental," and "must remain actively involved in treating the patient."

And the services and supplies must be "an expense to the physician or other listed NPP" — staff the practice employs or contracts with, not another business's.

The setting is limited too.

The regulation confines incident-to services to a noninstitutional setting, and the manual is blunt: under the Physician Fee Schedule, "we don't pay physicians or NPPs for incident to services in an institutional setting (hospital or SNF)."

CMS also expects a real clinical relationship rather than a signature layer: "a course of treatment established by the physician or practitioner and in which the physician or practitioner is actively participating and managing."

Read the conditions as CMS words them: they attach to "the physician or other listed NPP" — and the general-supervision rule expressly allows the practitioner supervising your staff to be someone other than the practitioner "who is treating the patient more broadly."

So map the roles before relying on the arrangement: which listed practitioner personally provided the initial service and remains actively involved in treating the patient, and which practitioner supervises the staff member and submits the claim — they may be different listed practitioners, and only the supervising one bills.

Work with no initial service behind it does not qualify, however licensed the staff member is.

The staff member's own status is governed by 42 CFR 410.26(a)(1): auxiliary personnel must meet "any applicable requirements to provide incident to services, including licensure, imposed by the State in which the services are being furnished."

It is your state's law — the scope-of-practice statute and board rules — that decides whether a given person may furnish a given behavioral health service at all.

Medicare enrollment is not required of the staff member: the employee, leased-employee and independent-contractor forms all qualify, and the person must simply not be excluded from federal health care programs or have had their own Medicare enrollment revoked.

The exclusion check is yours to run and document — see hiring compliance: license verification and exclusion checks for how.

There is a trap in the state-law test.

CMS's 2023 rulemaking states that "in the case where State law and scope of practice are silent about whether an individual serving in the capacity of auxiliary personnel is licensed/authorized to provide a given behavioral health service, the supervision level … will default to the standard direct supervision requirement."

If your state's law does not clearly authorize the person to furnish the service, do not assume the general-supervision flexibility applies — the claim reverts to the stricter default for that service.

Peer support is the cleanest example of the rule working as designed.

Medicare's peer support codes (G0140 and G0146, payable since January 1, 2024) are furnished under the general supervision of the billing physician or other practitioner, and the peer specialist never enrolls in Medicare — the billing practitioner does.

Incident-to is a Medicare construct.

A practice without a physician, clinical psychologist, NP, CNS, PA or CNM cannot use it — and "supervised billing" under Medicaid or a commercial contract is decided by different systems entirely, not by 42 CFR 410.26.

Medicaid is the state plan.

The federal benefits are drawn around state scope of practice: the "other licensed practitioner" benefit covers services "provided by licensed practitioners within the scope of practice as defined under State law" (42 CFR 440.60), and the rehabilitative benefit covers services recommended by a physician or other licensed practitioner of the healing arts "within the scope of his practice under State law" (42 CFR 440.130(d)).

CMS's 2014 informational bulletin supplies the federal hook for unlicensed staff: their services can be covered under the other-licensed-practitioner benefit when — among other conditions — the state's scope-of-practice act specifically allows licensed practitioners to supervise the non-licensed practitioners who furnish the service, and the licensed practitioners bill for it.

Two states are documented examples — illustrative, not a national pattern.

Utah's Medicaid rehabilitative manual lists — in the manual's own wording — associate marriage and family therapists, associate clinical mental health counselors and certified social worker interns among the individuals who may "prescribe" rehabilitative services, supervised per state Title 58 requirements.

Louisiana's behavioral health manual requires provisionally licensed professional counselors, provisionally licensed MFTs and licensed master social workers delivering mobile crisis response to practice under regularly scheduled supervision set by their licensing board.

Beyond examples like these, your state's plan and provider manual decide — never another state's.

Managed care adds a second gate.

States must establish a uniform credentialing and recredentialing policy that their managed care organizations must follow (42 CFR 438.214), and a plan may operate a provisional network provider agreement for up to 120 days pending state enrollment (42 CFR 438.602) — so a Medicaid MCO clinician typically needs both state enrollment and the plan's credentialing.

For staff-qualification categories such as QMHP, which are program definitions rather than licenses and differ by state, see what is a QMHP?

Commercial payers are contract law.

Pre-licensed clinicians are generally not credentialed as panel members in their own name, and whether their supervised work is payable depends on the plan and the state.

The one documented case is Colorado: after the Division of Insurance's Bulletin B-4.131 strongly encouraged carriers to let pre-licensed candidates bill for patient care, the Division's plan/filing-year 2023 survey found 11 of 18 carriers allowed billing for a pre-licensed provider under the supervision of a licensed contracted provider.

One state's survey is not a national rate — check payer by payer.

For the enrollment and credentialing mechanics themselves (NPI, PECOS, CAQH ProView), see starting a private practice.

Billing under a supervisor who is not on the list.

The most expensive version: an associate's services billed incident to an LCSW's, LPC's or LMFT's own professional services.

CMS's manual says it does not cover services provided incident to those practitioners' personal professional services, and the exposure lands on the billing practitioner and the organization.

The bar is on those services, not on the practice's ownership — a qualifying practitioner on staff changes the answer.

Dating the rule to 2024.

General supervision for behavioral health arrived January 1, 2023.

MFT and MHC enrollment arrived January 1, 2024.

Policies and job descriptions that cite 2024 for the supervision change are citing the wrong rule.

Skipping the conditions supervision is measured against.

General supervision relaxes where the supervisor must be during the service.

It does not relax the initial-service requirement, the active-involvement expectation, the noninstitutional-setting limit, or the expense requirement.

A practice that bills incident-to when no physician or other listed NPP personally provided the initial service, or is no longer actively involved in treating the patient, is exposed on all of them.

Assuming the default.

Where state law is silent on whether a person may furnish the service, the supervision level defaults to direct supervision.

Check the state scope-of-practice act and board rules for each staff role before relying on general supervision.

Generalizing one payer's answer.

Medicare's regulation, your state Medicaid plan, and each commercial contract are three different systems with three different answers.

Utah's or Louisiana's Medicaid manual tells you nothing about your state's; Colorado's survey tells you nothing about another state's carriers.

This page is general career and hiring information, not legal or billing advice, and not guidance for anyone seeking treatment. Payer rules change; confirm current requirements with the specific payer, your state Medicaid program, or a health-care billing attorney before relying on any arrangement described here.