Locum vs. Per Diem: What's the Difference?

Locum tenens and per diem are two flexible staffing options in healthcare, but they are not the same. While both can help providers work on their own terms, they differ in assignment length, schedule structure, and level of commitment.

Understanding locum vs per diem helps clinicians choose the right path for their lifestyle and career goals. It also helps facilities decide which staffing model fits coverage needs. This guide explains both models, compares them side by side, and points to tools when travel stipends and federal per diem caps matter.

Note on “per diem”: In staffing, per diem usually means shift-by-shift work. In travel finance, it can also mean a daily allowance for meals and lodging (often benchmarked to GSA federal rates). Locum contracts often involve both ideas—temporary work plus per-diem-style stipends when you travel.

What is locum tenens?

Locum tenens refers to a temporary healthcare assignment where a provider fills in for another clinician or covers a staffing gap. These assignments typically last for weeks or months and are often used to support hospitals, clinics, and practices during absences, leaves, or periods of high demand.

Locum work usually comes with a more structured schedule and a defined assignment period. It can be a strong option for providers who want flexibility without changing jobs permanently—or who want to explore new practice settings before committing.

Hospitals and health systems use locums to maintain access when permanent staff are unavailable. Industry groups such as the National Association of Locum Tenens Organizations (NALTO) publish workforce context on how agencies and facilities structure these placements. For federal travel per diem benchmarks on locum trips, see our locum guides and locum per diem calculator.

What is per diem work in healthcare?

In healthcare hiring, per diem work is shift-based and usually offered on an as-needed basis. Instead of committing to a longer assignment, providers can pick up individual shifts depending on availability and facility needs.

This option offers a high level of flexibility and works well for clinicians who want more control over their schedules. Per diem jobs are often local and may be used to fill short-term staffing gaps quickly—similar in practice to PRN (pro re nata) roles at many employers.

Per diem shifts are typically paid as wages through the facility or staffing partner—not as a separate tax-free travel allowance. If you also travel overnight for work, employer reimbursement may still follow accountable-plan or GSA-style caps; that is separate from picking up local per diem shifts.

Locum vs. per diem: side-by-side comparison

The main difference between locum tenens and per diem is the structure of the work. Locum assignments are longer and more defined, while per diem roles are more short-term and shift-based.

Which option is right for you?

Locum tenens may be a better fit if you want a temporary role with more consistency, a defined schedule, and the possibility of travel. It can also suit clinicians who want to explore different practice settings or regions before a permanent move.

• You can commit to a multi-week contract with predictable income.
• You are open to licensing, credentialing, and travel logistics.
• You want to compare agency housing and meal stipends to GSA lodging and M&IE for the assignment city.

Per diem may be the better choice if you prefer total flexibility and want to work only when it fits your schedule. It is often ideal for providers who want supplemental income or part-time work without a long-term commitment.

• You want to accept or decline shifts week by week.
• You prefer to stay local and avoid extended travel.
• You are balancing another job, school, or family obligations.

Allied health travelers (RNs, therapists, techs) often use the same locum vs per diem decision framework as physicians. For assignment stipends and GSA caps, see the travel nurse calculator and nursing guides.

Pay, stipends, and federal per diem (do not confuse the terms)

Locum vs per diem job type is separate from federal per diem rate tables. On many locum contracts, tax-free housing and meal components are compared to GSA lodging and meals and incidental expense (M&IE) limits for the hospital city—especially when you maintain a tax home and the assignment is temporary.

Use our locum per diem calculator to estimate GSA totals for assignment dates and see whether weekly housing or meals stipends are under or over federal caps. The locum stipends vs GSA guide and tax home basics explain how clinicians often apply these benchmarks—not tax advice; confirm with your agency and preparer.

Per diem shift pay, by contrast, is usually straightforward wages for hours worked. It may not involve GSA-style stipend caps unless you are also traveling overnight under a separate reimbursement policy.

Why healthcare facilities use both models

Healthcare organizations use locum and per diem providers to maintain coverage and reduce staffing shortages. Locum tenens helps fill longer-term gaps; per diem staffing is useful for day-to-day or last-minute coverage needs.

Together, these staffing models give facilities more options for maintaining patient care without overextending permanent staff. The American Hospital Association and similar groups regularly discuss workforce shortages that drive demand for both approaches.

Facilities planning federal-style travel reimbursement for employees (not locum agencies) can estimate CONUS rates with our federal GSA calculator or state rate hubs. Field sales and other traveling staff follow similar accountable-plan ideas—see sales guides.

Related calculators and guides on PerDiemCalculator

• Locum tenens per diem calculator — GSA lodging & M&IE, weekly stipend compare
• Travel nurse & allied health calculator
• Locum guides — stipends vs GSA, tax home basics
• Travel nurse guides
• Which per diem calculator should you use?
• What is per diem? (daily allowance vs shift work)