Sometimes.
State law — not training or certification — decides it.
As of May 2026, 28 of the 51 US jurisdictions (27 states plus DC) grant nurse practitioners full practice authority, and 11 of those first require a transition-to-practice period.
Several non-full-practice states have legislated hours-based routes out, while five states bar NPs from prescribing Schedule II stimulants outright.
Full, reduced and restricted: what the three labels mean
Practice authority is decided at the state level: the legislature writes the nurse practice act, and the state board of nursing administers it.
The American Association of Nurse Practitioners (AANP) then sorts the result into three labels, per its map updated May 2026.
For what the credential itself is — the training, certification, and licensure layers — see what a psychiatric nurse practitioner is.
Full practice.
The state board of nursing, acting alone, permits NPs to evaluate patients, diagnose, order and interpret tests, and manage treatment — including prescribing medications and controlled substances — under the exclusive licensure authority of that board.
AANP counts 28 of the 51 jurisdictions here: 27 states plus the District of Columbia.
Reduced practice.
State law reduces the NP's ability to engage in at least one element of practice and requires a career-long regulated collaborative agreement with another health provider, or limits a practice setting.
Twelve states: Alabama, Arkansas, Illinois, Indiana, Kentucky, Louisiana, Mississippi, New Jersey, Ohio, Pennsylvania, Wisconsin, and West Virginia.
Restricted practice.
State law restricts the NP's ability to engage in at least one element of practice and requires career-long supervision, delegation, or team management by another health provider.
Eleven states: California, Florida, Georgia, Michigan, Missouri, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, and Virginia.
Even a restricted tier is rarely absolute.
Michigan, a restricted state, lets NPs prescribe non-scheduled drugs independently under board rule — the career-long requirement attaches to controlled substances, through physician delegation.
The label tells you where the friction sits; it does not itemize every permission.
And the categories describe prescribers — which is what makes them worth a full page.
No therapy licence prescribes anywhere in the US; the prescriber landscape is laid out in can a therapist prescribe medication?
AANP's tiers are advocacy labels, not law
Where a PMHNP can practise independently today
These 28 jurisdictions authorize full practice, per AANP's map updated May 2026: Alaska, Arizona, Colorado, Connecticut, Delaware, Hawaii, Idaho, Iowa, Kansas, Maine, Maryland, Massachusetts, Minnesota, Montana, Nebraska, Nevada, New Hampshire, New Mexico, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wyoming, and the District of Columbia.
Eleven of the 28 carry a transition-to-practice requirement — Colorado, Connecticut, Maine, Maryland, Massachusetts, Minnesota, Nebraska, Nevada, New York, South Dakota, and Vermont, per AANP's November 2025 snapshot.
The other 17 impose none: a per-state reading of statute and rule found no pre-independence period in any of them, and two states have recently dismantled their old systems — Delaware repealed its collaborative-agreement requirements effective August 2021, and Utah removed its Schedule II mentorship condition in 2023.
In those 17, a newly licensed PMHNP can practise — and prescribe — from day one.
Nevada shows how narrow a transition can be.
Nevada NPs are independent for practice from licensure; the transition rule reaches only one act, prescribing Schedule II medications, which requires either two years or 2,000 hours of clinical experience — or a protocol approved by a collaborating physician.
In reduced and restricted states, by contrast, the agreement or supervision is written as a career-long condition.
It lasts unless the state legislates a way out — which several have, as the next section shows.
Transition-to-practice: the hours behind the full-practice label
A transition-to-practice rule is a statutory or board-rule period a newly licensed NP serves within a full-practice state: practise under a defined agreement first, and the requirement later falls away.
The eleven requirements differ far more than the shared label suggests — in length, in who can fill the senior role, and in what the rule actually gates.
| State | What the transition requires |
|---|---|
| Colorado | A three-year clinical-work-experience attestation, plus a 750-hour prescribing mentorship with a physician or an experienced APRN, completable within three years — the rule gates prescriptive authority. |
| Connecticut | The first three years practising in collaboration with a physician; independence after three licensed years and at least 2,000 collaborative hours, with written notice to the Department of Public Health. |
| Maine | At least 24 months under a physician or a supervising nurse practitioner — or employment in a clinic or hospital where a physician serves as medical director. |
| Maryland | An 18-month mentorship with a nurse practitioner or physician of at least three years' experience, required of first-time NPs — the mentor consults and collaborates, and does not supervise. |
| Massachusetts | At least two years of supervised practice following certification, under a physician or a qualified nurse practitioner / psychiatric nurse mental health clinical specialist. |
| Minnesota | At least 2,080 hours practising within a collaborative agreement in a hospital or integrated clinical setting — the collaborator may be a physician or an APRN. |
| Nebraska | At least 2,000 hours under a transition-to-practice agreement; the supervising provider may be a nurse practitioner with at least 10,000 hours. |
| Nevada | No transition for practice itself — the rule gates only Schedule II prescribing: two years or 2,000 hours of clinical experience, or a physician-approved protocol. |
| New York | More than 3,600 hours practising in collaboration with a physician, after which the written agreement and protocols are no longer required; the no-collaboration provision is written to run through July 1, 2030. |
| South Dakota | At least 1,040 hours of licensed practice, verified to the board of nursing on a practice verification form. |
| Vermont | Fewer than 24 months and 2,400 hours of licensed active practice means a collaborative provider agreement applies; each additional role or population focus takes 12 months and 1,600 hours. |
Two nuances matter when comparing offers.
First, the senior party is not always a physician: in Colorado, Maine, Maryland, Minnesota, and Nebraska, an experienced nurse practitioner can fill the role.
Second, the counts are set by statute or board rule and are stated exactly — Minnesota's 2,080 hours is one full-time year by the statute's own arithmetic, not a rounded figure — so read your state's numbers rather than a summary's.
The exit routes AANP's tiers don't show
AANP's tier describes the default rule, not always the career.
Nine states outside the full-practice list have legislated an exit — an hours-or-years threshold after which some or all of the career-long condition drops.
These are easy to miss precisely because the tier map does not show them.
| State (tier) | The exit route |
|---|---|
| Illinois (reduced) | 4,000 hours of clinical experience with physicians plus 250 hours of continuing education after national certification — attested — ends the collaborative-agreement requirement. The full-practice sections are scheduled for repeal on January 1, 2028, so watch the legislature. |
| Kentucky (reduced) | Four years of prescribing experience ends the agreement for non-scheduled drugs; four years of controlled-substance prescribing ends that agreement too, after a board review and written notice. |
| Arkansas (reduced) | 6,240 hours under the board-required physician agreement — or practising in a state that authorizes prescriptive practice — earns a Full Independent Practice Authority certificate, renewed every three years. |
| Florida (restricted) | 3,000 hours under physician supervision within the previous five years earns an autonomous-practice registration — but the statute limits autonomous practice to primary care, while the board rule's primary-care definition includes behavioral and mental health. Whether a PMHNP qualifies is unresolved; the two documents point in different directions. |
| California (restricted) | A "103 NP" has completed three full-time-equivalent years, or 4,600 hours, of transition-to-practice and may practise outside standardized procedures in listed settings; a "104 NP" adds three further years and may practise outside those settings. |
| Virginia (restricted) | Three years of full-time clinical experience, attested, replaces the written practice agreement — the three-year threshold took effect in July 2024. |
| West Virginia (reduced) | Three years in a duly documented collaborative relationship, with prescriptive authority, ends the agreement for prescribing. |
| Oklahoma (restricted) | 6,240 hours of clinical practice with prescriptive authority under physician supervision earns the authority to prescribe independently — effective November 2025. |
| Wisconsin (reduced) | 3,840 hours of nursing practice in a clinical setting plus 3,840 hours of APRN practice with a physician or dentist immediately available for consultation — each spanning at least 24 months — and the APRN practises independent of that physician or dentist. Added by 2025 Wisconsin Act 17, effective September 1, 2026. |
Note what the exits do and don't do.
They remove the agreement or supervision requirement — they leave the state's drug-schedule limits untouched, and those bind independently of tier.
Timing explains why map and statute can disagree for months: AANP's map is dated May 2026, and Wisconsin's new rules only take effect September 1, 2026.
The same unbundling — "independent practice" is really several separate permissions — runs through the therapy licences too: can an associate therapist practise independently? asks the parallel question on that side.
The Schedule II catch: ADHD prescribing stays gated in five states
The most practice-relevant rule in this area is invisible on the tier map.
In five states, state law bars NPs from prescribing Schedule II stimulants — the ADHD medications — in ordinary outpatient practice: Alabama, Georgia, Missouri, Oklahoma, and Texas.
- Alabama. NP prescriptive authority extends only to Schedules III through V — Schedule II sits outside it.
- Georgia. No Schedule II prescribing, with one narrow exception added in 2024: hydrocodone or oxycodone for an emergency, capped at a five-day supply.
- Missouri. Schedule II authority reaches hydrocodone only, capped at a 120-hour supply; other Schedule II drugs are limited to hospice care.
- Oklahoma. No Schedule II prescribing by NPs at all — the bar applies even to NPs holding the new independent prescriptive authority.
- Texas. Schedule II prescribing is limited to facility-based hospital practice — inpatient settings or the emergency department — or hospice.
So in those five states, a PMHNP's stimulant prescribing runs through a physician — in the reduced and restricted tiers, and after any exit route alike.
Elsewhere the map hides carve-outs in the opposite direction.
Florida exempts psychiatric medications prescribed by a statutorily defined "psychiatric nurse" from its seven-day Schedule II cap.
Kentucky allows a 30-day psychostimulant supply when the APRN is psychiatric-certified and practises in a listed state facility or program.
Ohio lifts its Schedule II limits at community mental health centers and qualifying outpatient behavioral-health practices — and requires a PMHNP's collaborating physician to practise psychiatry, pediatrics, or primary care.
Arkansas allows stimulant continuation only when a physician initiated the medication and saw the patient within the previous six months.
Two common misreads to avoid.
Several states cap opioid prescriptions, and those caps do not touch stimulants — the schedules are separate legal categories.
And the federal layer adds nothing the state forbids: an NP registers with the Drug Enforcement Administration as a "mid-level practitioner," pays $888 for a three-year registration, and that registration never exceeds what state law allows.
Even under full practice, the employer may still require an agreement
Full practice authority changes what the law requires — not what the employer's policy manual does.
A 2025 study in the Journal of Nursing Regulation (Slade et al.), analyzing AANP's national workforce surveys from 2016 through 2024 with 7,251 full-time NPs in the 27 full-practice states and DC, found agreements alive and well where the law no longer asks for them.
In full-practice states with a transition-to-practice period, 54.0 percent of NPs reported practising under a formal agreement anyway, against 32.3 percent in full-practice states without one — 48.7 versus 37.5 percent after weighting.
Among NPs practising under an agreement no law required, the dominant reason — 74.4 percent of respondents in transition states, 80.3 percent in the rest — was that the employer requires it.
The practical reading: past any transition period, an agreement is an employment term, not a legal requirement — which makes it negotiable.
Ask about it in interviews, and get it off your file once it no longer serves you.
How to find what your state actually allows
Four systems touch this question, and only one decides it.
The state legislature writes the nurse practice act.
The state board of nursing administers it and writes the rules beneath it.
The DEA sits on top and adds nothing the state forbids.
And the compacts — often assumed to carry authority across state lines — don't: the APRN Compact is not in effect anywhere, with enactments in five states (Delaware, North Dakota, South Dakota, Utah, and Wyoming) where seven are needed, and a multistate APRN licence would require at least 2,080 hours of APRN practice.
The Nurse Licensure Compact's 43 jurisdictions move an RN licence only.
- Read the APRN section of your board of nursing's site — the practice authority, prescriptive authority, and any transition-to-practice rule — not a summary of it.
- Find the statute or rule behind each requirement and note its effective date: several 2024–2026 changes are recent enough that older pages contradict them.
- Ask any prospective employer directly who signs the practice or collaborative agreement, and whether the requirement survives past a transition period or exit threshold.
- If independence matters to you, treat it as a negotiable term — employer policy, not law, explains most agreements in full-practice states.
Browsing open psychiatric nurse practitioner roles shows the same licence scoped a dozen different ways by employers — a useful sample of how the rules land in real job descriptions.
This article is general career information, not legal, clinical, or medical advice, and it is not guidance for anyone seeking treatment. Practice authority, prescriptive authority, and controlled-substance rules are set by state legislatures, boards of nursing, the DEA, and compact commissions, and all of them change — confirm the current rules with your state board of nursing before relying on any of it.