Locum Tenens Telepsychiatry: Multi-State Licensing and Tax Nexus

For decades, state income tax sourcing for personal services has generally followed one simple idea: income is sourced to the state where the work was physically performed. If you flew to Ohio and worked a locum shift, Ohio taxed that income. If you never set foot in Ohio, Ohio had no claim on you. This is physical-presence sourcing, and it's still how most locum tenens income works today.

Telehealth complicates this because the physician and the patient are, by definition, in two different places at once. States had to decide which location controls for tax purposes, and they haven't all decided the same way.

A meaningful, and growing, group of states have either issued explicit telehealth sourcing guidance or apply general "benefit received" sourcing principles that functionally source telehealth income to the patient's location. Other states still apply straightforward physical-presence rules and haven't specifically addressed telehealth. And in some states, the guidance is genuinely ambiguous, older statutes written before telehealth was common, applied by analogy, with no definitive answer. This is an area of state tax law that is actively evolving, not a settled national standard.

This is a tax guide, not a licensing guide, but the two issues are connected enough to be worth a short explanation. Telepsychiatrists commonly hold medical licenses in multiple states, often obtained more easily through interstate licensure compacts such as PSYPACT (the Psychology Interjurisdictional Compact), which allows qualified providers to practice across participating states without a separate full license application in each one.

PSYPACT and similar compacts solve a licensing problem: they make it administratively easier to legally treat patients across state lines. They do nothing to solve, or even address, the separate tax question of which states can tax the income you earn from those patients. The two systems run on entirely different rules. A compact can make it easy to build a five-state patient panel in a single year; it won't tell you which of those five states you owe income tax in. That's a separate analysis, and it's the one most telepsychiatrists don't realize they need until tax season.

We're not going to give you a state-by-state table claiming to be exhaustive or permanent, because that table would be wrong within a year as states update their guidance. What we can tell you is the general pattern: the states most likely to assert nexus over telehealth income tend to be the same states that are generally aggressive about income tax enforcement and sourcing in other contexts, high-tax states with active residency and nonresident income audit programs, such as California and New York, are frequently cited as examples of states applying, or being willing to apply, patient-location-style sourcing to telehealth income.

The pattern isn't "no-tax states are safe and high-tax states are risky" in a simple sense, it's that states with more aggressive tax enforcement generally, and more tax revenue at stake, tend to invest more in identifying nonresident income they believe they're entitled to tax. If a meaningful share of your patient panel is in a state known for assertive income tax enforcement, that's the state to prioritize for a nexus review, regardless of whether you've ever physically been there.

Illustrative example, not a specific client outcome. Dr. Reyes is a 1099 locum telepsychiatrist who lives in Texas (no state income tax) and holds active medical licenses in five states via PSYPACT: Texas, Arizona, Colorado, California, and New York. She works entirely from her home office in Texas and never physically travels to see patients.

Even though Dr. Reyes holds five state licenses, her actual filing exposure this year is driven by only three things: which states she's licensed in, which of those states she actually saw patients in, and how aggressively each of those states sources telehealth income to the patient. Being licensed in a state creates no tax obligation by itself, no patients, no income sourced there, nothing to file. But Colorado and California, where she has real patient volume, are the states that need a genuine sourcing analysis, not an assumption either way.

This is the shape of the problem for most multi-state telepsychiatrists: licensing footprint and tax filing footprint overlap, but they're not identical, and only a year-by-year review of actual patient locations tells you where the real obligation sits.

If you've ever worked telehealth as a W-2 employee, this entire issue may feel unfamiliar, and there's a reason for that. A W-2 telehealth employer, a large platform or health system, typically has payroll and compliance infrastructure built specifically to handle multi-state telehealth work: they register the business entity in the relevant states, withhold state income tax based on the sourcing rules they've already researched, and issue you a W-2 that reflects the correct state wage allocations. As the employee, you largely just file the return that matches the W-2.

As a 1099 locum telepsychiatrist, none of that infrastructure exists on your behalf. You are the business. There's no employer registering you in Colorado or withholding California tax on your behalf, because there is no employer. You're responsible for identifying the states where you may have created nexus, registering to file in those states if required, and making any necessary quarterly estimated payments, on top of the federal self-employment tax obligations that already come with 1099 locum work.

This is the practical tradeoff of 1099 locum flexibility applied to telehealth: the same independence that lets you build a multi-state PSYPACT practice on your own schedule also means the multi-state tax compliance burden lands entirely on you. It's manageable, but it needs to be handled proactively, not discovered at filing time.