🧠 BIMS Test

The Brief Interview for Mental Status is the cognitive screen embedded in the US nursing home assessment (MDS 3.0). It takes two minutes: repeat three words, state the year, month, and day, then recall the three words, with cueing if needed. Fifteen points total.

Scores of 13 to 15 indicate intact cognition, 8 to 12 moderate impairment, and 0 to 7 severe impairment. This page administers the BIMS with its official scoring, useful for students, caregivers, and anyone learning the instrument.

How to administer the BIMS

Speak clearly, face the person, and allow time. Hearing aids and glasses should be in place: sensory loss is not cognitive loss.

Scoring

The points add to 15, with recall weighted heaviest since new learning is the most sensitive cognitive function.

The cueing structure is the clever part: recalling with a category cue (1 point) shows the memory was stored but not freely retrieved, a pattern typical of early impairment, while no recall even with cueing suggests deeper encoding failure.

Worked example

Repeats all 3 words (3), correct year (3), correct month (2), correct day (1), recalls "sock" spontaneously (2), "blue" with the color cue (1), cannot recall "bed" (0). Total: 12. Moderately impaired: the cue-dependent recall is the classic early pattern worth evaluating.

A perfect run: 3+3+2+1+6 = 15, intact. A severely impaired profile might be 1+0+0+0+1 = 2.

What the bands mean

13 to 15: intact on this screen. 8 to 12: moderate impairment: needs further evaluation (medical workup, formal cognitive testing) and care planning around supervision needs. 0 to 7: severe impairment: full assessment, safety planning, and support services.

Crucially, the BIMS screens; it does not diagnose dementia. Delirium (acute confusion from illness), depression, medications, and untreated hearing loss all depress scores reversibly. For related geriatric screens, see our Berg balance scale and Barthel Index.

BIMS vs MMSE and MoCA

The Mini-Mental State Examination (30 points) and Montreal Cognitive Assessment (30 points) are fuller instruments covering more domains: visuospatial tasks, executive function, language. The BIMS deliberately covers less: it is designed for routine nursing-home screening by any trained staff member, not for detailed diagnosis.

Think of it as the quick-check version of cognitive testing: fast, repeatable, and good at flagging change. A dropping BIMS over quarterly assessments is the signal; the MoCA or neuropsychological testing is the workup.

BIMS inside the nursing home assessment

The BIMS is one small gear in the Minimum Data Set 3.0, the standardized assessment every US nursing home completes on admission, quarterly, and with major changes. Trained staff, not just clinicians, can administer it, which is the point: cognitive screening becomes routine rather than a specialist referral.

The score feeds the care plan directly. A new 9 where last quarter was 14 triggers a delirium workup and a medication review before anyone assumes decline. Facilities also track BIMS trends as quality measures, since a unit full of dropping scores suggests something environmental: infections, dehydration, over-sedation.

Families can use the number too. Ask for the BIMS at care conferences the way you would ask about blood pressure: "What was it this quarter, and what changed?" A stable 11 is a different conversation than a falling one, and the trend is information the family deserves.

One documentation tip: record the exact words missed and the cues that worked, not just the total. "Recalled blue with cue, missed bed" tells the next assessor far more than "12" alone, and it makes genuine change visible across quarters. Scores also gate certain care decisions: very low scores prompt swallowing evaluations and supervision planning, since cognition and safety travel together.

Delirium vs dementia at the bedside

A dropping BIMS forces one question first: delirium or dementia? Delirium is acute, over hours to days, with inattention as its hallmark: the person cannot focus, awareness drifts, and it fluctuates through the day, worse at night. Dementia is gradual, over months, with memory loss leading and attention relatively preserved early.

The distinction changes everything because delirium is usually reversible. Urinary infections, dehydration, new medications (especially anticholinergics and sedatives), constipation, and pain are the classic triggers in nursing homes. Treat the trigger and the BIMS often rebounds, sometimes fully.

Bedside clues help: a family saying "she was fine last week" points to delirium; sundowning that is new points to delirium; a BIMS that swings between 6 and 12 across days is delirium until proven otherwise. Never accept a sudden cognitive drop as "just dementia" without the delirium workup.

For informational purposes only, not medical advice. Consult a healthcare professional.