Locum Tenens Psychiatry for Employers: Coverage, Credentialing and Cost Structure

A locum buys time, not capacity.

The situations it fits are bounded ones: planned leave such as parental or medical leave, a sabbatical, a reserve deployment, a demand surge your permanent staff cannot absorb, or the weeks between one psychiatrist's resignation and the new hire's first session.

The Medicare statute is built around that boundary: the substitute physician's services may not run over a continuous period of more than 60 days, unless the regular physician has been called or ordered to active duty in a reserve component of the Armed Forces for that whole period.

If the gap will still be open when the 60-day billing window closes, a locum block is the wrong tool — you are adding a prescriber, and that is a sourcing, screening and credentialing project of its own.

The departed-psychiatrist case is common enough that CMS writes for it directly: a group that engages a substitute as a temporary replacement for a physician who has left may bill for that substitute for up to 60 days.

Treat that billing window as the planning boundary for the recruiting search behind it — backfilling the role is covered in the behavioral health hiring hub.

Employers already staff prescriber coverage in a mix of modes.

Among psychiatric NP listings active on BehavioralHires on October 6, 2026, 68.2% were full-time, 19.2% part-time and 12% contract.

Locum tenens sits at the bounded end of that spectrum: it is a coverage decision with a start and an end, not a headcount one.

You can buy locum coverage two ways: engage the psychiatrist directly, or contract through a locum tenens agency.

CMS describes the traditional arrangement as a substitute physician paid per diem or on another fee-for-time basis, holding the status of an independent contractor rather than an employee of the regular physician.

Where the contractor-versus-employee line sits for a given working relationship is its own analysis — our guide to independent contractor therapists covers it.

When the psychiatrist comes through an agency, responsibility for workplace safety is shared rather than transferred.

OSHA treats a staffing agency and its client — you, the host employer — as joint employers of temporary workers, so both are responsible for providing and maintaining a safe work environment.

Put each party's safety and training duties in writing in the agency contract instead of assuming the agency carries them.

Billing runs down one of two paths, and every other decision follows from the choice.

Inside Medicare's fee-for-time exception, your group bills the substitute's services under the absent physician's name with modifier Q6 — the next section gives the mechanics.

Outside that exception, Medicare pays the clinician's employer, or an enrolled entity that bills under a contractual arrangement with the clinician, instead of the clinician.

Reassignment carries two terms worth reading before you sign: your entity and the clinician are jointly and severally responsible for any Medicare overpayment, and the clinician keeps unrestricted access to the claims your entity submits for their services.

What drives the cost

Start with what is not knowable in advance: our research found no neutral source that publishes locum psychiatrist day rates, hourly rates or agency markups, and none that publishes standard behavioral health recruiter or staffing-agency fee percentages either.

The figures in circulation come from agency marketing — so treat every number in a proposal as a quote to negotiate, never a benchmark to check it against.

What you can do is price the components: the clinician's fee-for-time pay; the agency's fee on top; travel and housing for on-site blocks; state licensure costs; DEA registration; malpractice coverage; and your own staff time for credentialing and payer enrollment.

Compare the total engagement cost against what the permanent alternative would pay — the psychiatrist salary guide tracks the pay side of that comparison.

Start with the name, because it helps you search the right document.

CMS calls these "fee-for-time compensation arrangements" — formerly locum tenens arrangements — in chapter 1, section 30.2.11 of the Medicare Claims Processing Manual.

The conditions come from the statute, section 1395u(b)(6)(D) of Title 42 of the U.S. Code: your regular psychiatrist must be unavailable, and the arrangement must be either informal and reciprocal, or paid per diem or on another fee-for-time basis.

When the conditions hold, your group bills the substitute's services with HCPCS modifier Q6 after the procedure code, and Medicare pays as though the regular physician had provided the service.

One structural requirement makes the modifier available: the substitute must not have reassigned their right to Medicare payment to your group.

The manual section still names the CMS-855R for that reassignment, but CMS has since discontinued the form: reassignment is now reported on the CMS-855I or in PECOS, so that is where to check.

A locum and a reassigned contractor cannot be billed the same way, so pick the path before the first session rather than after the first claim.

Two notes on scope.

If the covering clinician is a psychiatric nurse practitioner rather than a psychiatrist, the fee-for-time rule is simply unavailable — the manual section does not extend to NPs, psychologists or other nonphysician practitioners, so a covering PMHNP bills under their own enrollment or through reassignment instead.

And if a physician locum's block drifts past 60 days, the fix is structural, not clerical: the excess days move to the locum's own billing or a reassignment, which is far easier to plan before the block starts than to unwind after claims are in.

Licensure comes first because nothing else works without it.

Each state licenses physicians for practice in that state — which is why the Interstate Medical Licensure Compact, the expedited pathway for eligible physicians, produces a separate license from each participating state rather than one portable credential.

One application replaces the separate paperwork, but the costs are real: a non-refundable administrative fee, a fee for each state license, and fingerprints submitted for a criminal background check.

DEA registration is location-specific in a way that surprises employers hiring across state lines.

Federal regulation requires a separate registration for each principal place of business or professional practice where controlled substances are dispensed.

The exception worth knowing: an office where a practitioner only prescribes — no administering, no dispensing, no stock of controlled substances — does not need its own registration if the practitioner is registered at another location in the same state.

That exception helps a psychiatrist covering your second office across town; it does not help a locum whose other registration is in a different state.

If your locum will prescribe controlled substances at your practice, plan on a DEA registration in your state.

Then the payer side, which follows the billing path you chose.

Q6 claims run under your absent physician's existing Medicare enrollment, so that enrollment work is yours and already done.

A locum who bills under their own number, or whose payment is reassigned to your group, needs their own Medicare enrollment or reassignment statement on file first — the same sequence as any new prescriber, which our guide to Medicare enrollment for new hires walks through step by step.

Whatever the path, the internal work — credentialing file, privileges, remaining payer enrollments — belongs before the first session; the full checklist is in our guide to credentialing new clinicians.

Our research found no sourced norms for how locum malpractice coverage is structured — no primary source we checked sets a standard allocation of who buys the policy or a standard tail arrangement — so treat the contract, not the market, as the lever.

Get answers to these questions in writing before the engagement starts, with your own carrier or broker reading them:

Who is the insured?

The locum's own policy, the agency's, or an endorsement to yours — and is your practice entity named on it?

Claims-made or occurrence?

If the policy is claims-made, ask who funds the tail once the engagement ends.

Do the limits match the exposure?

Your patients create the liability; the certificate should show limits you would accept for your own clinicians.

Does your own policy reach non-employees?

CMS describes the traditional locum as an independent contractor rather than an employee of the regular physician, so do not assume your staff coverage follows them automatically.

Get the certificate in hand before the first session and file it with the credentialing paperwork.

How coverage works for employed clinicians — the arrangement you are comparing against — is its own topic in our guide to malpractice insurance for employed clinicians.

Telepsychiatry answers a different question.

A locum substitutes for your psychiatrist for a bounded block — your patients, your caseload, your name on the schedule.

A telepsychiatrist adds prescriber capacity that is remote — a standing arrangement rather than a bounded block.

Used well, they are complements: locums carry you through a leave or a departure gap, telepsychiatry widens what you can offer week to week.

Medicare treats the two differently, and the difference is often the deciding factor:

The psychiatrist's side of both models — locum pay, multi-state licensure under the IMLC, and what a telepsychiatry job can prescribe — is covered in our guide to locum tenens for psychiatrists.

It is worth reading before you design the engagement, because the terms that make a block attractive to the clinician are the terms you will be negotiating.