How Long Will Insurance Pay for Inpatient Rehab in New York?

There is no fixed day limit. New York does not permit insurers to cap inpatient addiction treatment at a set number of days, and length of stay is determined by clinical need rather than by a number written into your policy.

What New York does give you is a protected window. For the first 28 days of an inpatient admission at an in-network facility certified by the state, your insurer generally cannot review the stay for medical necessity at all — provided the facility does one specific thing within two business days of your admission. Most people never learn about that condition until it has already been missed.

This guide explains how the timeline actually works, what happens on day 29, what determines length of stay clinically, and exactly what to do if you are told you are being discharged before you feel ready.

The Recover is a referral network of licensed treatment providers, not a treatment provider itself. We may receive compensation from facilities in our network. Calls are answered by a treatment specialist.

The timeline at a glance

Stage	What your insurer can do	What decides it
Before admission	Cannot require prior authorisation at an in-network OASAS-certified facility	State law — no approval needed to start
Days 1 to 28	Cannot conduct concurrent review, provided the facility met the notification conditions	The facility notifying the insurer within two business days
Day 29 onward	May conduct concurrent review at intervals	Medical necessity assessed with the LOCADTR tool
After discharge	May conduct retrospective review, including of the first 28 days	Whether care met LOCADTR criteria at the time

Each stage is worth understanding separately, because the action available to you differs at each one. If you want the broader picture of what a residential stay involves, our guide to residential rehab covers the treatment itself.

The 28-day protection, and the condition that activates it

Under New York Insurance Law, coverage for inpatient substance use treatment at an in-network OASAS-certified facility is not subject to preauthorisation, and is not subject to concurrent utilisation review during the first 28 days of the admission. The Department of Financial Services sets this out in its guidance on mental health and substance use disorder coverage.

That protection is conditional. Three things have to happen:

1. The facility must notify your insurer of the admission and the initial treatment plan within two business days.
2. The facility must assess you clinically each day and determine whether you still need care at that level.
3. The facility must consult with the insurer periodically during the admission.

If the facility does not provide the required information within two business days, the insurer may begin concurrent review at any point. The protection is not automatic and it is not yours to trigger — it depends entirely on the facility doing its part in the first 48 hours, when you are least able to check.

The single most useful thing you can do

On day two or three of an admission, ask the program directly: have you notified my insurer of the admission and sent the initial treatment plan?

It is a fair question, admissions staff deal with it routinely, and a well-run program will answer immediately. If the answer is vague, ask again and ask for the date it was sent. Getting this right in the first 48 hours can be the difference between a protected month of treatment and a review that begins in week one.

This is also a reasonable question to ask a program before you admit. How they answer tells you something about how they handle utilisation management generally — which matters a great deal once you are inside.

Who this applies to

The protection covers plans regulated by New York State, including commercial coverage, Medicaid Managed Care, Child Health Plus and the Essential Plan. It applies at in-network facilities licensed, certified or otherwise authorised by the New York State Office of Addiction Services and Supports. Self-funded employer plans are governed by federal law instead, so the specific New York protections may not apply — our guide to whether insurance has to cover rehab in New York explains how to tell which type you have.

One thing the protection does not do

It stops review during the stay. It does not prevent a retrospective review afterwards. An insurer can look back at the admission, including the first 28 days, and assess whether the care met the state-designated criteria at the time. This is another reason the facility’s daily clinical documentation matters — it is the record that defends the admission later.

Where the 28-day figure comes from, and why it is not a clinical number

It is worth being clear that 28 days is a regulatory and historical figure, not a finding from treatment research. The month-long rehab stay became standard decades ago for reasons of programme design and insurance practice, and it persisted because coverage patterns reinforced it.

The clinical evidence points somewhere else. The National Institute on Drug Abuse states that remaining in treatment for an adequate period is critical, that most people need at least three months to significantly reduce or stop substance use, and that for residential or outpatient treatment, participation for less than 90 days is of limited effectiveness.

NIDA is equally clear that there is no predetermined length of treatment, because the right duration depends on the severity of the individual’s problems and needs. Recovery is described as a long-term process that often involves more than one episode of care.

So the gap is real: the protected window is 28 days, and the clinical benchmark for sustained outcomes is considerably longer. That gap is precisely why so many people find themselves discussing discharge at a point when they do not feel ready — and it is why understanding what happens on day 29 matters.

It is worth adding that 90 days does not have to mean 90 days in a residential bed. The evidence concerns continuous engagement in treatment, which routinely means residential care followed by structured outpatient programming and then ongoing support. Stepping down is not the same as stopping.

What happens on day 29

From day 29, your insurer may begin concurrent review — periodically assessing whether continued inpatient care remains medically necessary. This is normal, it happens to nearly everyone in a longer stay, and it is not by itself a sign that anything is wrong.

The decision is not made on the insurer’s own internal criteria. For substance use disorder, New York requires the use of the Level of Care for Alcohol and Drug Treatment Referral tool (LOCADTR 3.0), developed by OASAS with NYU Grossman School of Medicine. There is a specific concurrent module for reviews during an ongoing stay.

In practice your clinical team prepares and submits documentation supporting continued stay, and the insurer’s reviewer assesses it against LOCADTR. Most of this happens without your involvement. A good program handles it as routine administrative work and does not put it on the patient.

New York also prohibits “fail first” requirements for substance use treatment, so your plan cannot require you to try and fail at a lower level of care before covering the level your clinician recommends.

What actually determines how long you stay

Setting insurance aside, these are the clinical factors that shape length of stay. Knowing them helps you understand a continued-stay decision rather than experiencing it as arbitrary.

• Withdrawal and medical stabilisation. Alcohol and benzodiazepine withdrawal in particular can require extended medical management. Our guide to what to expect in detox covers this stage.
• Co-occurring mental health conditions. Depression, anxiety, PTSD or bipolar disorder alongside a substance use disorder generally extends the clinical picture. See dual diagnosis treatment.
• The substance involved and the pattern of use. Opioid dependence with a long history looks different from a shorter episode of stimulant use, and treatment responds accordingly.
• Response to treatment so far. Engagement, symptom change and stability all feed into continued-stay documentation.
• Whether a safe environment exists to return to. This is a legitimate clinical consideration, not a technicality. Returning to active use in the household, to homelessness, or to an unstable situation genuinely affects the appropriate level of care.
• Whether the next level of care is actually secured. Under New York law, before discharge the facility must indicate to the insurer whether the services in your discharge plan are secured or reasonably available.

That last point deserves emphasis. A discharge plan is not meant to be a piece of paper handed to you on the way out. The facility has an obligation to tell your insurer whether the aftercare it proposes actually exists and is available to you. If you are being discharged to “outpatient treatment” with no programme named, no appointment booked and no confirmed placement, that is a reasonable thing to raise. See IOP, PHP and sober living for what a real step-down looks like.

If you are told you are being discharged and you do not think you are ready

This is the situation most people are in when they search for this question. Here is what to do, in order. None of it requires you to be combative, and all of it is routine from the plan’s point of view.

4. Ask for the decision in writing, with the specific reason and the criteria used. You are entitled to both.
5. Ask whether LOCADTR was applied. If your plan used its own internal criteria for a substance use determination, that alone may be grounds to challenge the decision.
6. Ask your clinical team to request a peer-to-peer review. This puts your treating clinician directly in conversation with the insurer’s reviewing clinician, and it resolves a meaningful share of continued-stay disputes without a formal appeal.
7. Request an expedited internal appeal. When you are still admitted and a delay would jeopardise your health, an appeal can be handled on an accelerated timeline rather than the standard one.
8. If the internal appeal fails, request an expedited external appeal through the New York State Department of Financial Services. An independent clinical reviewer makes the decision, not your insurer. Details are on the DFS complaint and appeal page.
9. If you have Medicaid, ask about continuation of benefits. Acting within the timeframe on the notice can keep services running while your appeal proceeds, and Medicaid managed care members can escalate to a State Fair Hearing after a plan appeal.
10. Call CHAMP, New York’s free advocacy service for behavioural health coverage problems. It exists for exactly this and costs nothing.

Two things worth knowing

A denial of continued stay is not a statement that you are cured. It is an assessment that the current level of care is no longer the clinically indicated one — which is a narrower claim, and one that can be wrong. Treating it as a clinical opinion you are entitled to contest is both accurate and more useful than treating it as a verdict.

And leaving against medical advice before you have exhausted these steps generally weakens your position rather than strengthening it. If the situation is genuinely unsafe, that is different — but if the dispute is about coverage, the appeal routes above are the mechanism designed for it.

How long insurance covers each level of care

Inpatient is the level people ask about most, but the same logic runs across the continuum, and knowing the shape of it helps you plan rather than react.

Medical detox

Typically the shortest stage, measured in days rather than weeks, and driven almost entirely by physiology. Alcohol and benzodiazepine withdrawal can require extended medical management because of seizure risk; opioid withdrawal is rarely dangerous but is severe enough that people leave without support. Detox stabilises the body so treatment can begin, and on its own it is rarely enough. See medical detox.

Inpatient and residential

The 28-day protection and the concurrent review process described above apply here. Length is set by clinical need, and continued stay is documented and reviewed rather than granted in fixed blocks.

Partial hospitalisation

Daytime clinical programming while living at home or in sober housing, commonly running several weeks. Because PHP is an outpatient service, a separate New York protection applies: insurers generally cannot conduct concurrent review during the first four weeks of continuous outpatient treatment, up to 28 visits, on the same notification conditions. See PHP.

Intensive outpatient

Several sessions a week around work or school, often continuing for months. The same four-week outpatient protection applies at the start, and coverage after that is assessed on continued clinical need. See IOP and virtual IOP.

Medication for addiction

This one is different in an important way. Medication for opioid use disorder is not time-limited in the way a residential stay is, and New York prohibits prior authorisation on buprenorphine, methadone and long-acting injectable naltrexone. People remain on these medications for months or years where clinically indicated, and doing so is the standard of care rather than an extension of treatment. See medication-assisted treatment for opioid addiction.

Sober living

Worth flagging because it is commonly misunderstood. Sober living residences are housing rather than certified treatment, and they are generally not covered by health insurance in the way a treatment programme is. People often fund this stage privately even when their treatment was fully covered. See sober living.

What to do in the first 48 hours of an admission

If you are reading this before or at the start of a stay, this short list is the most valuable part of the page.

11. Confirm the facility is in-network and OASAS-certified. The 28-day protection depends on both. Our guide to what OASAS certification means explains how to check.
12. Ask whether the insurer has been notified of the admission and the initial treatment plan, and on what date.
13. Ask who handles utilisation review at the program, and how you will be told if continued stay is questioned.
14. Ask what the expected length of stay is and what would change it in either direction.
15. Ask when discharge planning begins. In a well-run program the answer is “on admission,” not “near the end.”
16. Give the program a contact person — a family member who can make calls on your behalf if you are not in a position to.

If you are the family member doing the calling, our guide on helping a loved one covers the wider role, and family support covers what comes after.

Frequently asked questions

How long does insurance cover rehab in New York?

There is no fixed day limit. New York does not permit insurers to cap inpatient addiction treatment at a set number of days. For the first 28 days at an in-network OASAS-certified facility, the insurer generally cannot conduct concurrent review at all, provided the facility notified it of the admission and treatment plan within two business days. From day 29, continued stay is reviewed against the state-designated LOCADTR criteria.

Does insurance cover 30 days of rehab?

In New York, the first 28 days of an in-network inpatient admission are protected from concurrent review, so a month-long stay rarely encounters a coverage challenge during treatment. Longer stays are possible and are decided on clinical need rather than a day count.

Does insurance cover 90 days of rehab?

It can. There is no rule capping a stay at 30 or 60 days in New York. From day 29 the insurer may review continued stay at intervals, assessed using LOCADTR. Ninety days of continuous treatment often means residential care followed by structured outpatient programming rather than three months in a residential bed.

What happens after 28 days?

Your insurer may begin concurrent review, periodically assessing whether continued inpatient care remains medically necessary using the LOCADTR tool. Your clinical team submits documentation supporting continued stay. This is routine and happens in most longer admissions.

Can insurance make me leave rehab early?

An insurer can determine that continued inpatient care is no longer medically necessary, which ends coverage at that level. It cannot require you to leave. You can appeal, request a peer-to-peer review between your clinician and the insurer, and request an expedited external appeal through the New York State Department of Financial Services.

What is concurrent review?

A periodic assessment by your insurer, during a stay, of whether continued care at that level remains medically necessary. In New York it may not begin until day 29 of an inpatient substance use admission, provided the facility met the notification requirements.

What if the facility did not notify my insurer in time?

If the required information is not provided within two business days, the insurer may begin concurrent review at any point, and the 28-day protection is effectively lost. Ask the program early in the admission whether notification was sent and on what date.

How long should rehab actually last?

The National Institute on Drug Abuse states that most people need at least three months of treatment to significantly reduce or stop substance use, and that for residential or outpatient treatment, participation for less than 90 days is of limited effectiveness. There is no predetermined length, since the right duration depends on individual severity and need.

Does the 28-day protection apply to Medicaid?

The New York requirements apply to insurers offering comprehensive coverage including Medicaid Managed Care, Child Health Plus and the Essential Plan. Self-funded employer plans are governed by federal law and the specific New York protections may not apply.

Can my insurer review the stay after I leave?

Yes. The prohibition applies to review during the stay, not afterwards. An insurer may conduct a retrospective review, including of the first 28 days, assessing whether the care met the state-designated criteria at the time.

Do I have to start over if I need treatment again later?

No. Recovery is recognised as a long-term process that frequently involves more than one episode of care, and a previous admission does not disqualify you from a later one. Coverage is assessed on current clinical need.

Related guides

• Residential rehab — what to expect
• Does insurance have to cover rehab in New York?
• How to check your New York rehab benefits before you call
• In-network vs out-of-network rehab in New York
• What OASAS certification means when choosing a treatment center

Authoritative resources

• NY Department of Financial Services — mental health and substance use disorder coverage
• NY Department of Financial Services — complaints and external appeals
• NYS OASAS — Level of Care Determination (LOCADTR)
• NYS OASAS — paying for treatment and the CHAMP helpline
• NIDA — Principles of Effective Treatment
• SAMHSA National Helpline — 1-800-662-4357

Disclaimer: The Recover is a referral network of licensed, professional addiction and mental health treatment centers. We are not a treatment provider, medical facility, insurance company or law firm, and we may receive compensation from facilities in our network. This content is educational and is not legal advice, medical advice, or a substitute for a formal verification of benefits. Coverage and length of stay depend on your individual plan, eligibility and clinical circumstances. Laws and regulations change; verify current requirements with the New York State Department of Financial Services or a qualified professional before relying on them. In a medical emergency, call 911.