Insomnia Severity Index
Answer the seven Insomnia Severity Index questions and see your total out of 28 with the published classification. The questionnaire is reproduced word for word, it runs entirely in your browser, and it is a screen rather than a diagnosis. For adults.
Medically reviewed by Kevin Brandstetter, M.D.Updated September 23, 2026
Insomnia Severity Index (ISI)
Please rate the current (i.e., last 2 weeks) SEVERITY of your insomnia problem(s).
1a. Difficulty falling asleep:
1b. Difficulty staying asleep:
1c. Problem waking up too early:
2. How SATISFIED/dissatisfied are you with your current sleep pattern?
3. To what extent do you consider your sleep problem to INTERFERE with your daily functioning (e.g. daytime fatigue, ability to function at work/daily chores, concentration, memory, mood, etc.).
4. How NOTICEABLE to others do you think your sleeping problem is in terms of impairing the quality of your life?
5. How WORRIED/distressed are you about your current sleep problem?
Your ISI score
Incomplete
0 of 7 answered
Answer every question to see the score. A partly answered questionnaire has no score of its own.
A score is a screen, not a diagnosis. The next step is a conversation with a licensed clinician, who reads a number like this alongside your history, not on its own.
A screen, not a diagnosis.
The Insomnia Severity Index asks how much trouble with sleep has affected you over the last two weeks. It cannot diagnose a sleep disorder or anything else, and a number on its own says little about one person. Only a licensed clinician can make a diagnosis, and they read a score alongside your history, not instead of it. This tool is for adults.
Methodology
- How this is calculated
- Each of the seven answers scores 0 to 4, by the number the form prints under it. The seven are added for a total between 0 and 28, which falls in one of the four classifications the form publishes. No total appears until every question is answered, because a partly answered questionnaire has no score.
- Where the data comes from
- The rating instruction, the questions, the answer choices, the scoring, and the classification are reproduced word for word from the original form: Bastien CH, Vallières A, Morin CM. Validation of the Insomnia Severity Index as an outcome measure for insomnia research. Sleep Medicine. 2001;2(4):297-307. doi:10.1016/S1389-9457(00)00065-4. The cut-offs for the classification were validated in: Morin CM, Belleville G, Bélanger L, Ivers H. The Insomnia Severity Index: psychometric indicators to detect insomnia cases and evaluate treatment response. Sleep. 2011;34(5):601-608. The form is read from the copy Penn Medicine hosts. Form reprinted in Shahid et al. (eds.), STOP, THAT and One Hundred Other Sleep Scales, Springer 2012, from Bastien et al. 2001, with permission from Elsevier; Temi reproduces the published instrument with citation. The Harvard Medical School Division of Sleep Medicine reprint omits the fifth answer on the first three questions; this page follows the original 2001 form.
- Last updated
- September 23, 2026
- What this does not account for
- Everything a clinician asks beyond these questions: how long the trouble has gone on, your sleep schedule and habits, snoring or breathing pauses at night, pain, mood, your medical history, your medications, and caffeine and alcohol. The form publishes four ranges of the total and no single threshold, so this tool reports the range and nothing more.
What the classifications mean
The form's scoring guide reads:
- Add scores for all seven items (1a+1b+1c+2+3+4+5) = ____
- Total score ranges from 0-28
The form sorts the total into the four classifications below, in its own words. The badge beside a score on this page uses a shorter label for each, without the word insomnia, because a range of a score is not a statement about the person who scored it.
| Score | The form's classification | Badge on this page |
|---|---|---|
| 0 to 7 | No clinically significant insomnia | None |
| 8 to 14 | Subthreshold insomnia | Subthreshold |
| 15 to 21 | Clinical insomnia (moderate severity) | Moderate |
| 22 to 28 | Clinical insomnia (severe) | Severe |
Why the wording is not edited
The Insomnia Severity Index is a validated questionnaire: its ranges mean what they mean because large numbers of people answered these questions in this wording. Shorten a question or soften a phrase and the score is no longer the score the research is about. So the questions and the answer choices here are reproduced exactly as the original form prints them, including its capitals and its title-case answer labels, rather than rewritten in Temi's voice the way the rest of this page is. Where the form labels only the two ends of a scale, the answers between them are shown as the form shows them, by number.
Nothing here is stored
Your answers stay in your browser. They are not sent to Temi, not saved, not attached to you, and not recorded in any session replay, and closing the tab clears them. Temi knows only that someone opened this tool, the same thing it knows about every page.
Copying the result link is the one way answers leave your browser, and you decide when. The link carries the seven answers in the part of the address after the “#”, which browsers never send to a web server, so Temi still never sees a score. Anyone holding the link can open it and read the answers, so send it only to someone you mean to show.
If you want to act on what you see, the useful next step is a conversation with a clinician who knows you, or one you can get to. Temi does not prescribe controlled substances.
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Temi's physicians review renewals for non-controlled medications, usually within 48 hours. A score on this page is not a prescription and does not decide anything.
A licensed physician reviews every request. Nothing on this page is a prescription.