Incident-to billing in behavioral health: what the documentation has to show

By Selam Koch, PMHNP-BC, founder of OneStep Scribe and practicing psychiatric nurse practitioner. Published September 2026.

A behavioral health group with one psychiatrist and four psychiatric nurse practitioners will eventually be told, by a consultant or a colleague or a forum post, that it should be billing incident-to. The advice arrives as though it were a setting to switch on. Incident-to is instead a narrow Medicare billing pathway with conditions attached to every visit it touches, and most of those conditions live in the documentation, which is where practices lose them.

This guide is for the person deciding whether a practice uses that pathway at all and, if it does, what the notes have to contain. It is a documentation guide, not a compliance opinion, and it is not legal or billing advice. The rules are intricate, they are applied through regional Medicare contractors that publish their own guidance, and they have changed more than once. Treat everything below as a starting point for a conversation with your Medicare Administrative Contractor (MAC), each payer you bill, and a qualified healthcare attorney or compliance professional.

What incident-to means in plain terms

The arrangement is this. A service is delivered by someone other than the billing provider, inside that provider's practice, as part of a course of treatment the billing provider already established for that patient. The claim goes out under the supervising provider's identifier rather than the identifier of the person who delivered the service. Where that billing provider is a physician, the conditions are met and the claim is accepted, payment has typically followed the physician fee schedule amount for that service and locality, before the annual deductible, the 20 percent coinsurance, your participation status and sequestration are applied to what actually arrives. Nothing about meeting the conditions guarantees payment: nothing here guarantees reimbursement, claim acceptance, or any particular amount, and every claim is still adjudicated on its own. Where the billing provider is a nurse practitioner, physician assistant or clinical nurse specialist billing incident to their own professional services, the claim is still paid at 85 percent, and the payment argument in the next section does not apply at all. Those people who deliver the service are described as auxiliary personnel, which in behavioral health usually means nurse practitioners and physician assistants, and in some arrangements other licensed clinical staff, depending on the service and the setting.

The supervising and billing provider does not have to be a physician. Nurse practitioners, physician assistants and clinical nurse specialists may supervise and bill for services furnished incident to their own professional services under their own identifiers, subject to the same conditions and to state scope of practice. That matters here, because many of the behavioral health groups I encounter are nurse practitioner owned or nurse practitioner led. That is an impression from the practices I talk to rather than a market statistic, and I have no survey behind it. This guide says physician as shorthand for whoever holds the supervising and billing role in your practice. In a group practice, the supervising provider on the day of service has been described as not needing to be the provider who established the plan: a colleague who is a member of the same group and is present in the office suite may supervise a service under a plan another member initiated, provided the enrollment and reassignment arrangements line up with the identifier that goes on the claim. Which identifier that is matters: the claim goes out under the provider who supervised on the day of service, not the one who established the plan, so the billing configuration has to follow the day's supervisor rather than the plan's author. That allowance rests on subregulatory manual guidance rather than on the text of the regulation, so confirm both the allowance and the identifier question with your MAC before configuring it in your billing system. Nothing published requires the record to name both people, but a record naming only one of them leaves a reviewer to infer the other, which is why practices name both.

The reason practices care is money. The statutory basis is section 1833(a)(1)(O) of the Social Security Act, at 42 U.S.C. 1395l, which pays nurse practitioners, physician assistants and clinical nurse specialists at 85 percent of the physician fee schedule amount when they bill under their own numbers. For physician assistants that route is newer than people assume: PAs could not enroll to bill Medicare directly and reassign their own benefits until 1 January 2022, so older guidance describing PA services as billable only through the employer is out of date. Three cautions before anyone builds a model on it. The 85 percent figure applies to those practitioner types, not to every behavioral health clinician: clinical psychologists are paid at the full fee schedule amount rather than at a reduced rate, and clinical social workers, along with the marriage and family therapist and mental health counselor categories that became eligible to enroll effective 1 January 2024, are paid at 75 percent of the amount payable for a clinical psychologist's services rather than at 85 percent of the physician amount. The arithmetic also runs in the direction people usually state backwards: an 85 percent rate is a 15 percent reduction from the physician amount, which is roughly a 17.6 percent increase when a claim moves the other way. And the caution that matters most in a nurse practitioner owned or led practice: payment at the full fee schedule amount follows from a physician being the billing provider, not from the incident-to conditions being met. A service billed incident to a nurse practitioner's, physician assistant's or clinical nurse specialist's own professional services is paid at 85 percent either way. There is no differential to capture in that practice at all, so the pathway there buys a per-visit compliance obligation and no additional revenue, and any revenue model built on it is modeling a number that does not exist. The percentages, the practitioner types, and the services affected are set by rule, have been adjusted before, and interact with your own case mix and contracts, so verify every figure in this paragraph against the fee schedule in force for your date of service rather than against this paragraph.

Two framing points. The pathway is not a credentialing shortcut, though not for the reason it is usually given. Medicare does not require the auxiliary person to be separately enrolled; that is part of the design, and it is why practices reached for the pathway for clinician types that could not enroll before those categories were added. What Medicare does require is applicable state licensure and that the person not be excluded from federal health care programs, and most commercial and Medicaid contracts separately require the rendering clinician to be credentialed and named on the claim. Using the pathway to route around state licensure, an exclusion, or a contract term is a different and more serious problem than a documentation gap. And incident-to is not a status a practice occupies: each claim either met the conditions that day or it did not, and the chart is what says which.

The conditions, as the rules have been applied

Every row carries the same caveat: this is how the requirements have generally been described, and current guidance has to be verified with your MAC and your compliance advisor, not with this table. The pathway has also been tied to the physician office setting rather than facility settings, which carry their own rules.

Direct supervision is a presence requirement, not an availability feeling

Immediately available has generally meant physically in the office suite, able to step in without leaving the location. The two cases people ask about are not the same case. A physician who is elsewhere but connected by real time audio and video may fall under the virtual direct supervision provisions described in the telehealth section below, which have been time limited and repeatedly revised, so the answer depends on what is in force on the date of service. A physician reachable only by telephone from a hospital across town has not been treated as satisfying the requirement, because audio alone has not counted. A schedule can disprove presence outright, and it is the first document a reviewer will pull, but it evidences assignment rather than attendance. Presence is a fact somebody has to verify and record on the day.

Active involvement is not one intake visit forever

The physician's role is ongoing participation in the course of treatment, not a one time initiation. CMS has not published a required number of visits or a fixed interval, and individual contractors have said different things about what active involvement looks like. That gap is precisely why practices drift. A physician who saw a patient once in 2024 and has not appeared in the chart since is not actively involved in any sense a reviewer would recognize. Setting an internal cadence and documenting it is reasonable, as long as the cadence is real and nobody mistakes an internal rule for a published requirement.

What the documentation has to show

A claim submitted under a physician's identifier is a factual assertion about who did what, under what supervision. A reviewer reads the record, not the practice's intentions. CMS has not published a mandatory form of words for an incident-to note: there is no nationally prescribed attestation sentence and no mandated dated link-to-plan line. That is not the same as there being no documentation requirements. MACs publish their own expectations in local articles and education pieces, and some of them do specify that the performing and the supervising provider be identified in the record, so check your contractor's articles before deciding an element is optional. What follows is what reviewers have looked for, and what a record that has to be defended after the fact tends to need. Confirm with your MAC and your compliance advisor what your documentation must actually contain. Four things are worth making visible.

1. Who actually performed the service. Worth naming, with credentials, in the note itself rather than leaving it to be inferred from a signature line.
2. Who supervised, and that they were present and available. The physician named, with an affirmative statement of presence in the office suite and immediate availability during the service. A countersignature alone does not establish this, because a signature shows a document was reviewed rather than that anyone was present during the service. Contractors differ on what they accept as evidence of supervision, including whether a dated supervising-provider attestation carries it, so confirm with your MAC rather than assuming either way.
3. The link to the physician-established plan. What the plan is, when the physician set it, and that today's service continued it. One dated line does more work than a paragraph of narrative.
4. The physician's ongoing involvement. Visible across the chart: when the physician last saw the patient, what they changed, and when they expect to see the patient again.

Below is a fictional illustration of structure, not wording to adopt. Whatever your practice uses should be reviewed by your own compliance advisor.

One warning about attestation language. A canned supervision sentence that fires into every note by default is worse than no sentence, because it asserts a fact about a specific hour on a specific day that nobody verified. If the physician was at a conference on Tuesday and the template still says present in the office suite, the chart holds a false statement rather than a gap. Whatever mechanism you use has to be capable of saying no on the days the answer was no.

Telehealth changes the analysis, and the rules have moved

Hedge this one hard, and hedge it again next year. First separate two questions that get merged constantly. Medicare telehealth services are generally billed by the distant-site practitioner who furnished them, under that practitioner's own identifier, which is a different framework from incident-to; virtual direct supervision governs where a supervisor may be for in-office incident-to services and is not by itself authority to bill a telehealth visit under a supervising provider's number. Meeting the supervision standard does not settle who bills. With that separated, the supervision question. The difficulty there is structural: supervision has generally been defined by physical presence in the office suite, and a visit where the clinician is at home and the patient is in their kitchen has no office suite in it. Provisions permitting supervision through real time audio and video were introduced during the public health emergency, then extended and modified, with end dates that have shifted repeatedly.

So a policy written two years ago should not govern this year's claims, and the version you verified in January may not be in force in December. Note where the answer lives: virtual direct supervision is set nationally in the Physician Fee Schedule rule, not by individual contractors, so the current PFS final rule is the primary source and your MAC's local articles are secondary. Before billing any supervised telehealth visit this way, check the rule in force for the date of service, confirm your MAC's reading of it in writing, note the date, and set a reminder to re-verify. Where such an allowance applies, expect more documentation rather than less: the record should show how the supervising physician was available and by what means. For the encounter-level requirements, see telehealth psychiatry documentation.

Commercial payers and Medicaid often do something else

Incident-to is a Medicare construct. Commercial plans and state Medicaid programs write their own rules. Across contracts you will find all of the following, sometimes in one practice:

• Direct billing required. The plan credentials nurse practitioners and physician assistants and wants the rendering clinician's own identifier on the claim. Submitting under a supervising physician may then conflict with the contract regardless of what Medicare would allow. Read the agreement and confirm with the plan in writing.
• A supervision pathway with different conditions. Similar in shape to Medicare's, different in the details, sometimes with its own attestation or modifier requirements.
• No credentialing for certain clinician types, which forces a structural decision rather than a billing one.
• Silence. The manual says nothing. The most dangerous case, because a practice reads silence as permission and a reviewer later reads an unsupported claim. Ask, get it in writing, file it with the contract.

State Medicaid programs deserve their own pass. They vary widely, they change on their own schedules, and behavioral health is frequently carved out to a managed care entity whose policies differ again, so do not assume a commercial parent company's manual governs its Medicaid line. Billing platforms, meanwhile, submit whatever identifiers the practice configured, long after the arrangement that justified the configuration changed. A platform accepting a claim is not a compliance check. If you mix pathways across payers, somebody has to own the mapping of payer to billing method, and that mapping needs a review date.

The audit exposure

When the record does not show supervision or an established plan, the claim is not merely coded at the wrong level. The clinician identified on the claim is unsupported, which is a different kind of finding. The sequence practices commonly describe runs like this: a records request for a handful of claims, a determination that the sampled notes do not establish supervision, denial and recoupment, then a request for a larger sample. That is not the end of the road. Adverse determinations carry appeal rights, and those rights close on a clock the practice does not control: each level has a strict filing deadline that generally runs from receipt of the determination, and the higher levels carry minimum amount-in-controversy requirements that are adjusted annually. Whether and how to appeal, whether recoupment is stayed while an appeal is pending, and whether an extrapolation from a sample to a larger universe can be challenged are legal questions rather than documentation ones. Take the determination to a healthcare attorney the day it arrives rather than the week it is due, because the clock starts on receipt. The same clock runs earlier in the sequence. A records request carries its own response deadline, and missing it produces a denial on its own, so calendar that deadline the day the request arrives and then involve counsel or a compliance advisor in preparing the response, not as a reason to delay it. Where a reviewer sees a pattern rather than an isolated lapse, the questions that follow belong with a healthcare attorney.

None of that predicts anything about your practice, and nothing here guarantees a review outcome. The narrower point is more useful: the facts reviewers look for are cheap to record on the day and impossible to reconstruct honestly a year later. A practice adopting this pathway should decide at the same time who verifies supervision daily, where that verification is written down, and how often somebody samples its own notes for the four elements above. Keep schedules and coverage records too, because they are among the first documents a reviewer asks for, while remembering that a schedule shows who was assigned rather than who was actually in the suite.

Scope of practice changes the calculus

State practice authority and federal billing rules are separate systems and easy to conflate. New Jersey, where our practice sits, has been among the states moving toward broader independent practice for nurse practitioners, and similar changes have arrived at different speeds elsewhere. A change of that kind removes a state law reason for supervision. It does not decide how a Medicare claim should be submitted, and it does not change what a payer contract requires.

What it changes is the honest answer to a question worth asking directly: why is this supervision structure in place? If the state requires it, or the practice wants a physician available for a newer clinician, the structure is doing real work and the billing question follows the clinical one. If the only answer is that the differential is attractive, the practice is buying a payment increase with a per-visit compliance obligation and a physician tied to the office suite. Plenty of well-run groups have priced that against direct billing and chosen direct billing on purpose. Whichever way it goes, decide once, write it down, apply it consistently, and revisit when state law or a major contract changes.

What the note can and cannot carry

A clinical note establishes clinical facts well and practice facts badly, because the person writing it does not have them at hand. Who was in the office suite at 2:15 pm is not something the visit reveals, and a clinician reconstructing it at 7 pm is guessing. So the encounter note carries the clinical content, the performing clinician, and the link to the plan of care, all of which come out of the visit, while the supervision fact is attested on the day by the supervising physician, with the practice separately recording what it verified from the schedule and that confirmation. Some practices keep a daily supervision log for that reason. For the level of service on the visit itself, a separate question from who bills it, see how medical decision making, or alternatively total time on the date of the encounter, separates a 99213 from a 99214 or 99215. Since 1 January 2021 either route may be used to select the level for 99202-99215, and in psychiatric follow-up the time route often changes the answer; under the decision making route, two of the three elements have to be met or exceeded.

Be clear about what that separation does and does not buy. Separating the supervision record does not make it privileged or exempt from production. It remains part of the designated record set, it is discoverable, and it has to be retrievable and produced alongside the encounter note when a records request arrives; a practice that splits it out and then cannot find it on request is worse off than one that never split it. It also gets no HIPAA psychotherapy-notes protection. That carve-out at 45 CFR 164.501 is narrow: it covers a therapist's own process notes kept separate from the rest of the record, and it expressly excludes medication prescription and monitoring, session start and stop times, modalities and frequency of treatment, test results, and any summary of diagnosis, functional status, treatment plan, symptoms, prognosis and progress. It has never covered supervision, scheduling or billing records. So decide in advance who retrieves the supervision record, how it is linked back to the visit it covers, and how long you keep it.

Frequently asked questions

Can a new patient visit be billed incident-to?

Generally no, and in practice this is the failure I see described most often. As the rules have generally stood, the pathway applies to an established patient continuing care under a plan the physician already set. A first visit has no established plan, so there is nothing for a later service to be incidental to. This particular condition comes from the Medicare Benefit Policy Manual, Chapter 15, section 60.1, which describes the physician performing the initial service and subsequent services of a frequency that reflects active participation in the course of treatment. That is subregulatory guidance CMS and the MACs apply rather than text in 42 CFR 410.26, which codifies the other conditions: the noninstitutional setting, the integral and incidental requirement, the level of supervision, and the auxiliary personnel requirements. MAC articles differ in substance and not only in wording, so verify the manual, the regulation, and your own contractor's local articles.

Does the supervising physician have to be in the room?

No. Direct supervision has generally meant being on site in the office suite and able to step in and direct the work while the service is being furnished, rather than being in the treatment room or observing it. Availability by telephone from another location has generally not satisfied it. That is a paraphrase rather than the regulatory wording, which sits at 42 CFR 410.26 and the provision it cross-references and has been modified for particular circumstances and periods, so read the current text and confirm what applies to your date of service.

A patient with an established plan brings up a new problem. Can that visit still be billed incident-to?

As the rules have generally stood, a new problem sits outside the established plan, so the service addressing it does not fit the pathway. Practices handle this differently, including submitting that visit under the treating clinician's own identifier, or having the physician evaluate the patient and establish a plan at a separate encounter, after which later services may follow that plan. A physician evaluation cannot be applied backward to a visit that has already been performed: the visit where the new problem was addressed is billed under the clinician who performed it. The note is not optional either way: if a new problem was evaluated, the record should say so rather than describing continued management of something else. Take the billing decision to your compliance advisor.

Do commercial payers and Medicaid follow Medicare incident-to rules?

Many do not. Incident-to is a Medicare construct, and commercial plans and state Medicaid programs set their own policies. Some require the person who performed the service to be the person identified on the claim, some credential nurse practitioners and physician assistants directly, some broadly follow Medicare, and some say nothing at all. Silence is not permission. Ask each plan in writing and keep the answer with the contract.

Does incident-to apply to telehealth visits?

Start by separating two questions, because conflating them is the more expensive mistake. Medicare telehealth services are generally billed by the distant-site practitioner who furnished them, under that practitioner's own identifier, which is a different framework from incident-to. Virtual direct supervision changes where a supervisor may be for in-office incident-to services; it is not by itself authority to bill a telehealth visit incident-to. Satisfying the supervision question does not answer the billing question, and both have to be confirmed for your date of service.

On the supervision question itself, this is the least stable part of the topic and the answer has changed more than once. The difficulty is structural: supervision has generally been defined by physical presence in the office suite, which fits poorly when nobody is in the suite. Provisions allowing supervision through real time audio and video have been introduced, extended, and modified, often close to their expiration dates. Those provisions are set nationally in the Physician Fee Schedule rule rather than by individual contractors, so read the current PFS final rule first and your MAC's local articles second. Check the rule in force for the date of service before billing a supervised telehealth visit this way, and check again yearly.

What happens if the note does not name the supervising physician?

On review, a claim submitted under a physician's identifier with nothing in the record showing that physician's involvement or availability is difficult to defend. Outcomes practices describe include an education letter and a targeted probe-and-educate round, denial and recoupment, a request for a larger sample, extrapolation from that sample to a wider universe of claims, and referral to a UPIC; I have no audit dataset behind that, only what practices report. Where a reviewer sees a pattern rather than an isolated lapse, the matter can move beyond a coding dispute: claims that misattribute the rendering provider can raise False Claims Act and civil monetary penalty questions, and self-disclosure obligations of their own. What that means for a given practice is a legal question, so take it to a healthcare attorney rather than to a coder. None of this predicts anything about your practice, and no documentation habit guarantees a review outcome.

Our nurse practitioners can practice independently in our state. Does incident-to still matter?

State practice authority and federal billing rules are separate questions, and a change in one does not settle the other. New Jersey and a number of other states have moved toward broader independent practice for nurse practitioners, which removes a state law reason for supervision without deciding how a Medicare claim should be submitted. Some practices there move to direct billing and accept the payment difference for a simpler compliance posture. That trade is a business and legal decision, so make it with your compliance advisor rather than from an article.

Related guides

• 99213 vs 99214 vs 99215: leveling a psychiatric follow-up by medical decision making
• Billing 99214 with 90833: what each code has to prove
• Telehealth psychiatry documentation: what the note has to record
• Controlled substance documentation in psychiatric practice
• Prior authorization in psychiatry: what to submit and how to appeal

This article is educational and reflects one clinician's understanding of documentation and coding practice at the time of writing. It is not legal, billing, compliance, or payer-specific advice, and it does not guarantee reimbursement, claim acceptance, or audit outcomes. Medicare policy, contractor guidance, payer rules, and state law change; always verify current requirements with your Medicare Administrative Contractor, your payers, your coding resources, and a qualified healthcare attorney or compliance professional before changing how your practice bills. Nothing here creates an attorney-client or consulting relationship. CPT is a registered trademark of the American Medical Association.