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BIMS (Brief Interview for Mental Status) Calculator
Score the BIMS cognitive screening from the MDS 3.0. Tests repetition, temporal orientation, and recall with interpretation thresholds for intact, moderate, and severe impairment.
⚠️ Clinical Tool: BIMS is a brief cognitive screening, not a diagnosis. Abnormal scores require follow-up with comprehensive cognitive evaluation. Administer in a quiet environment with the patient's attention.
Section A: Repetition (Immediate Memory)
Say: "I am going to say three words. Please repeat them after me: sock, blue, bed."
Section B: Temporal Orientation
Ask these questions about current date. Accept answers within the stated tolerance.
Section C: Recall (Delayed Memory)
Say: "Now, what were the three words I asked you to remember?" Give categorical cue if needed.
BIMS Total Score
15/15
Cognitively intact
Repetition
6/6
Temporal Orientation
3/3
Recall
6/6
Total BIMS Score⧉
15/15
Classification: Cognitively intact
Repetition Score⧉
6/6
Immediate memory / registration. Tests encoding ability.
Temporal Orientation⧉
3/3
Awareness of current year, month, and day of week.
Recall Score⧉
6/6
Delayed recall — most sensitive to early cognitive decline. Cued recall (1 point) vs. uncued (2 points).
Classification⧉
Cognitively intact
No cognitive concerns based on this screening
Next Steps⧉
Routine reassessment
Reassess per MDS schedule or if clinical change noted.
BIMS Score Interpretation
| Score Range | Classification | Typical Clinical Context |
|---|---|---|
| 13-15 | Cognitively intact | No cognitive concerns based on this screening |
| 8-12 | Moderately impaired | Further cognitive assessment recommended; consider SLUMS or full neuropsych evaluation |
| 0-7 | Severe impairment | Significant cognitive impairment; comprehensive evaluation and care planning needed |
Cognitive Screening Tools Comparison
| Tool | Items | Time | Max Score | Sensitivity | Notes |
|---|---|---|---|---|---|
| BIMS | 7 | 2-3 min | 15 | 80-90% | Part of federally required MDS assessment |
| MMSE | 30 | 7-10 min | 30 | 80-90% | Copyrighted; cultural/language bias concerns |
| MoCA | 30 | 10-15 min | 30 | 90%+ | Better at detecting mild impairment than MMSE |
| Mini-Cog | 3 | 3-5 min | 5 | 76-99% | 3-word recall + clock draw; quick screening |
| SLUMS | 11 | 7-10 min | 30 | ~92% | Free; sensitive to mild cognitive impairment |
| PHQ-2/PHQ-9 | 2/9 | 1-5 min | 6/27 | 83% | Depression, not cognition — but often co-assessed |
Planning notes, formulas, and examples
About the BIMS (Brief Interview for Mental Status) Calculator
The Brief Interview for Mental Status (BIMS) is a standardized cognitive screening tool included in Section C of the Minimum Data Set (MDS) 3.0. It is federally mandated for all residents in Medicare/Medicaid-certified nursing homes in the United States, making it one of the most frequently administered cognitive assessments in healthcare.
BIMS assesses three cognitive domains in approximately 2-3 minutes: immediate memory (repetition of three words), temporal orientation (year, month, day of week), and delayed recall (recalling the three words after the orientation questions). The total score ranges from 0 to 15, with higher scores indicating better cognition.
Scores of 13-15 indicate intact cognition, 8-12 suggest moderate impairment, and 0-7 indicate severe impairment. It shows domain-level scoring, visual breakdown, classification with recommended follow-up actions, and a comparison table of common cognitive screening instruments used in clinical practice. It keeps the repetition, orientation, and recall items together so routine documentation can be checked quickly without changing the scoring structure.
When This Page Helps
BIMS scoring is simple in principle, but it is still helpful to have the repetition, orientation, and recall sections organized in one place. This calculator supports that workflow by keeping the item scores and total score together, which makes review easier during routine MDS documentation and when comparing one screening with a later one.
How to Use the Inputs
- Administer Section A: Say the three words (sock, blue, bed) and score repetition for each.
- Administer Section B: Ask about time orientation (year, month, day of week).
- Administer Section C: Ask the patient to recall the three words. Provide categorical cues if needed.
- Enter scores for each item.
- Review total BIMS score, domain breakdown, and classification.
Formula used
BIMS Total = Repetition (0-6) + Temporal Orientation (0-3) + Recall (0-6)
Max score: 15
Repetition scoring: 2 = first attempt, 1 = second attempt, 0 = unable
Recall scoring: 2 = recalled without cue, 1 = recalled with categorical cue, 0 = not recalled
Orientation scoring: 1 = correct (within tolerance), 0 = incorrectExample Calculation
Result: BIMS: 12/15 — Moderately impaired.
Repetition 6 + Temporal 2 + Recall 4 = 12. This falls in the moderate impairment range (8-12). The patient registered all three words but had difficulty with temporal orientation and needed a cue for one recall item. Further cognitive evaluation is recommended.
Tips & Best Practices
- Administer in a quiet, private environment with minimal distractions.
- Speak clearly and at a normal pace — ensure the patient is wearing hearing aids if prescribed.
- Do not provide additional memory cues beyond the standardized categorical cues for recall.
- If the patient scores 0-12, document the finding and trigger a cognitive care plan review.
- Compare BIMS scores over time — a decline of ≥3 points may indicate worsening cognition.
BIMS and the MDS 3.0 System
The Minimum Data Set (MDS) is a comprehensive assessment instrument mandated by CMS (Centers for Medicare & Medicaid Services) for all residents of certified nursing homes. BIMS was introduced in MDS 3.0 to replace the previously used Modified Mini-Mental State Examination (3MS), providing a standardized, non-copyrighted tool that emphasizes direct patient interview rather than staff observation.
Cognitive Domains Assessed by BIMS
BIMS focuses on three core cognitive functions: (1) Registration/encoding — the ability to attend to and initially process new information, tested by word repetition. (2) Temporal orientation — awareness of current time context, reflecting cortical integration and recent memory. (3) Delayed recall — the ability to store and retrieve information after a brief delay, the most sensitive indicator of early cognitive decline and hippocampal function.
Clinical Action Based on BIMS Scores
BIMS scores drive care planning in nursing facilities. Severely impaired residents (0-7) may require simplified communication strategies, environmental modifications for safety, ADL assistance plans, and behavioral management protocols. Moderately impaired residents (8-12) benefit from cognitive stimulation activities, medication review for cognitive side effects, and monitoring for further decline. Intact residents (13-15) still need periodic reassessment, as cognitive function can change rapidly with acute illness, medication changes, or depression.
Sources & Methodology
Last updated:
Methodology
This calculator follows the MDS 3.0 BIMS scoring structure exactly, adding the repetition, temporal-orientation, and recall subscores into the standard 0-15 total. It then places the total into the familiar intact, moderate, and severe impairment groupings used in nursing-facility documentation.
The result is a screening summary, not a stand-alone dementia diagnosis. Hearing, language, delirium, depression, education level, acute illness, and communication barriers can all affect the score, so abnormal results still need broader clinical interpretation.
Sources
- Long-Term Care Facility Resident Assessment Instrument 3.0 User's Manual (Centers for Medicare & Medicaid Services) — Primary CMS source for BIMS items, scoring rules, and MDS 3.0 use.
- Minimum Data Set 3.0 Resident Assessment Instrument (Centers for Medicare & Medicaid Services) — CMS technical context for MDS cognitive assessment in nursing facilities.
Frequently Asked Questions
BIMS was developed specifically for MDS 3.0 as a brief, standardized, non-copyrighted cognitive screening. Unlike the MMSE, BIMS is free to use, takes only 2-3 minutes, and was designed for nursing home populations. The MMSE is copyrighted by Psychological Assessment Resources and requires licensing fees.
Per MDS 3.0 requirements, BIMS is administered at admission, annually, and with significant change in status. In practice, it is often assessed quarterly. It should also be readministered if clinical change in cognition is suspected.
If the patient is unable to communicate verbally, BIMS cannot be administered. In this case, staff should complete the Staff Assessment of Mental Status (staff assessment for mental status) as an alternative, which uses observation-based items rather than patient interview.
BIMS has moderate sensitivity (~80%) for moderate-to-severe impairment but may miss mild cognitive impairment (MCI). For detecting MCI, the MoCA (Montreal Cognitive Assessment) or SLUMS (Saint Louis University Mental Status) are more sensitive screening tools.
MoCA is more comprehensive (30 items, 10-15 minutes, tests executive function, visuospatial, naming, clock drawing) and more sensitive to mild impairment. BIMS is faster (2-3 minutes, 7 items) and designed for nursing home use. MoCA is better for clinic-based comprehensive screening.
No. BIMS is a screening tool, not a diagnostic instrument. Abnormal BIMS scores should trigger referral for comprehensive cognitive evaluation (neuropsychological testing, medical workup for reversible causes, imaging if indicated).
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