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Printed on 7/20/2026
For informational purposes only. This is not medical advice.
Mini-Cog is a brief cognitive screening tool combining 3-word recall and clock drawing. It is commonly used in primary care, geriatrics, and preoperative settings to flag patients who may need more detailed cognitive evaluation.
Formula: Mini-Cog total = delayed 3-word recall (0-3) + clock drawing (0 or 2), range 0-5.
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The Mini-Cog has three components performed in a specific sequence. Step 1 — 3-word registration: Choose three unrelated words from a standardized set (e.g., banana, sunrise, chair — or leader, season, table — use standardized sets, not words that are semantically related). Read all three words slowly and clearly: 'I am going to say three words. Listen carefully and remember them because I will ask you to repeat them in a few minutes.' Ask the patient to repeat all three words immediately to confirm they heard them (registration — this is NOT scored). Step 2 — Clock Drawing Test: Immediately after registration, hand the patient a blank piece of paper and a pencil and instruct: 'I want you to draw a clock face. Put in all the numbers and then set the hands to show 10 minutes after 11 — that is, 11:10.' Do not provide additional hints. Time: the patient has approximately 3 minutes for the clock. The 11:10 time is specifically chosen because it prevents the patient from anchoring all hands on the 12, which would inflate performance. Step 3 — 3-word recall: After the clock drawing is complete (or 3 minutes have passed), ask: 'Now tell me the three words I asked you to remember.' Record which words the patient recalls correctly.
Word recall scoring: Score 1 point for each word spontaneously recalled without prompting. Total word recall score: 0–3. Category cues may be given after spontaneous recall (e.g., 'One of the words was a piece of fruit') — if the patient recalls a word with a category cue, score it as 0.5 OR per your institutional protocol (some versions score cued recall as 0). Clock drawing scoring (CDT): Score 2 (normal) if: all 12 numbers are present in correct sequence and position, the clock face is generally round, and both hands are present indicating 11:10 (hour hand pointing to 11, minute hand pointing to 2). Score 0 (abnormal) if ANY of the following: missing or incorrect numbers, numbers out of sequence or crowded on one side, numbers outside the clock face, missing hands, hands not indicating 11:10, or overall disorganization. Common CDT errors suggesting impairment: numbers 1–12 replaced by dashes, 13+ numbers written, hour hand pointing to 10 instead of 11, both hands pointing to the same number, clock drawn as a digital display rather than analog.
Add word recall (0–3) + clock drawing score (0 or 2) for a total Mini-Cog score of 0–5. POSITIVE SCREEN (score 0–2): suggests probable cognitive impairment warranting further evaluation. Score 0: no words recalled regardless of clock = positive. Score 1 or 2: any recall with abnormal clock = positive. Score 3 with abnormal clock = positive. NEGATIVE SCREEN (score 3–5): suggests lower likelihood of cognitive impairment at this time. Score 3 words + normal clock (5) = strong negative. Score 1–2 words + normal clock (2–3) = lower confidence negative. Important: Mini-Cog is a SCREENING tool, not a diagnostic test. A positive screen triggers referral for comprehensive neuropsychological evaluation or memory clinic consultation. A negative screen in the context of strong clinical concern (family report of significant memory problems, unexplained functional decline, ADL dependence) should be followed up with a more sensitive tool (MoCA, MMSE) or specialist referral.
Primary care physicians, geriatricians, nurse practitioners, physician assistants
The Affordable Care Act (ACA) and CMS require cognitive assessment as part of the Medicare Annual Wellness Visit (AWV). The Mini-Cog is one of the CMS-approved tools for AWV cognitive screening, endorsed by the Alzheimer's Association and ACT on ALZ quality care initiative. Its 3-minute administration time makes it uniquely practical in the 20–30 minute AWV format. A positive Mini-Cog screen at AWV triggers documentation in the problem list, collateral history gathering, medication review for cognitive side effects (anticholinergics, benzodiazepines), depression screening (PHQ-9), safety assessment (driving, medication management, financial management), and referral for comprehensive neuropsychological evaluation or memory clinic.
Surgeons, anesthesiologists, perioperative medicine clinicians
Pre-operative cognitive impairment is a major risk factor for post-operative delirium, prolonged hospital stay, and functional decline after surgery. The American College of Surgeons and PACE (Pre-operative Assessment of Cancer in the Elderly) guidelines recommend pre-operative cognitive screening for older adults. Mini-Cog is the preferred pre-operative screening tool due to its speed (3 minutes) and low educational bias. A positive Mini-Cog pre-operatively triggers: enhanced delirium prevention protocols (HELP bundle), family/caregiver notification and involvement in post-operative care, goals-of-care discussion about expected recovery trajectory, and consideration of comprehensive geriatric assessment before major elective procedures.
Emergency physicians, emergency nurses, geriatric emergency specialists
Cognitive impairment is present in 25–40% of older adults presenting to the ED, but is recognized in less than half without structured screening. Mini-Cog or 4AT can be administered in the ED triage or early evaluation to identify patients with underlying cognitive impairment that may affect: informed consent capacity, reliability of the clinical history, risk for post-ED delirium, safe discharge decision-making, and medication adherence. A positive Mini-Cog screen in the ED prompts family notification, simplified discharge instructions, medication reconciliation review, and follow-up appointment within 1 week. ACEP's Geriatric Emergency Department guidelines recommend cognitive screening for all patients ≥65.
Nursing home physicians, directors of nursing, MDS coordinators
Mini-Cog provides rapid cognitive screening for skilled nursing facility (SNF) and long-term care admissions, supplementing the cognitive domains captured by the Minimum Data Set (MDS). A positive Mini-Cog on admission documents baseline cognitive impairment, informs care planning (safety supervision level, medication management, wandering risk), guides communication strategy with the patient, triggers referral for comprehensive cognitive assessment if diagnosis is unclear, and establishes baseline for tracking cognitive trajectory over time. Quarterly Mini-Cog reassessment in long-term care detects significant cognitive change warranting medical evaluation.
Public health departments, senior centers, community organizations, ACO programs
Mini-Cog's language neutrality and minimal education bias make it the preferred tool for population-level cognitive screening programs, particularly in diverse immigrant communities, low-literacy populations, and rural areas. Community health workers with brief training can reliably administer Mini-Cog at senior centers, health fairs, and mobile clinic events to identify individuals who should be referred for formal evaluation. ACO (Accountable Care Organization) and HEDIS quality measures include dementia screening rates — Mini-Cog's speed and accessibility support high-volume screening completion.
Word selection is critical for Mini-Cog validity. Avoid using words that are semantically related (e.g., 'cat, dog, bird' — all animals, which aids recall and underestimates impairment) or words that are highly familiar and emotionally salient (e.g., 'family, love, home' — emotional valence aids memory). Use standardized word sets with no semantic relationship, such as: banana, sunrise, chair; leader, season, table; village, kitchen, baby. Each word set should be used consistently — switching word sets between assessments in the same patient introduces variability. Document which word set was used.
The instruction to set the clock to 11:10 is specifically chosen for the Mini-Cog for two reasons: (1) it requires the patient to place the hour hand on 11 and the minute hand on the 2 — distinguishing between the two hands requires understanding of clock face conventions, and (2) it avoids the confounding of numbers 12, 3, 6, and 9 being 'anchor' positions that may be correctly placed by chance even with significant visuospatial impairment. Using 3:00, 2:45, or other common times creates easier tasks that are less sensitive to cognitive impairment. Always use '10 minutes after 11' (11:10) as instructed in the validated Mini-Cog protocol.
The MMSE (Mini-Mental State Examination) has well-documented educational bias — patients with less than 9 years of education score 3–4 points lower than highly educated patients regardless of cognitive status, creating both false positives in low-education patients and potential false negatives in highly educated patients with early dementia. The Mini-Cog was specifically designed and validated to have minimal educational bias (Borson et al., J Am Geriatr Soc 2003). Clock drawing and word recall are less dependent on literacy than MMSE's reading, writing, and arithmetic items. Mini-Cog has been validated in English, Spanish, Chinese, Korean, and multiple other languages, making it suitable for diverse clinical populations.
Mini-Cog is a screen, not a diagnostic test. A positive screen must trigger next steps: (1) Administer MoCA (Montreal Cognitive Assessment) — a 30-point, 10-minute comprehensive cognitive screen with higher sensitivity for mild cognitive impairment (MCI) than Mini-Cog; (2) Obtain collateral history from family about functional changes, specifically IADL decline (medication management, finances, driving safety, getting lost); (3) Review medications for cognitive side effects (Beers Criteria anticholinergic burden); (4) Screen for reversible causes: depression (PHQ-9), thyroid (TSH), B12 deficiency, metabolic abnormalities; (5) Refer to memory clinic or neuropsychologist for comprehensive evaluation if MoCA also abnormal or if clinical concern persists despite negative MoCA.
Clock drawing assumes familiarity with analog clock faces, which varies by generation and cultural background. Older adults who grew up in settings where digital clocks predominated, or patients from certain cultural backgrounds where analog clocks were uncommon, may perform poorly on clock drawing due to unfamiliarity rather than cognitive impairment. Note this in the assessment: 'Patient unfamiliar with analog clock face — clock drawing may not be valid for this patient. Score based on word recall only.' In these cases, substitute an alternative brief cognitive measure (MoCA, 4AT, or MMSE) where possible.
A single Mini-Cog score provides a cross-sectional snapshot of cognitive function. Longitudinal tracking is more informative for clinical decision-making: stable scores over 2–3 annual assessments provide reassurance; declining scores trigger urgent evaluation. Document the date and score at each administration for comparison. A change from 5 to 3 over 2 years is clinically significant and warrants full workup even if 3 is technically in the 'negative screen' range. Conversely, a stable score of 3 over 5 years may represent the patient's baseline rather than progressive impairment.
Mini-Cog (and all cognitive screening tests) administered during delirium are invalid as assessments of baseline cognitive function. Delirium causes transient inattention and disorientation that will generate positive screens in patients who have no underlying dementia. Always wait until delirium has resolved before using Mini-Cog to screen for baseline cognitive impairment. If you need to distinguish delirium from dementia acutely, use the CAM (Confusion Assessment Method) rather than cognitive screening tools. Note: a patient who screens positive for delirium with CAM AND fails Mini-Cog may have delirium superimposed on dementia — a combination that requires both immediate delirium treatment and subsequent dementia evaluation after recovery.
Mini-Cog has excellent sensitivity for moderate-severe dementia but lower sensitivity for mild cognitive impairment (MCI). Patients in the earliest stages of dementia may score 4–5 on Mini-Cog while having MCI that will progress to dementia. If clinical suspicion is high despite a negative Mini-Cog (family reports significant memory problems, patient has unexplained functional decline, patient self-reports memory concerns), always follow up with the MoCA (30-point scale, sensitivity ~90% for MCI). MoCA takes 10–15 minutes and is significantly more sensitive than Mini-Cog for mild impairment, but its longer administration time makes Mini-Cog preferable for initial screening in busy settings.
Mini-Cog was developed by Borson et al. (Int J Geriatr Psychiatry 2000). Sensitivity 76–99%, specificity 89–96% in community and clinical populations. Outperforms MMSE in low-education and non-English-speaking populations (Borson et al., J Am Geriatr Soc 2003). Validated across multiple languages and ethnicities. Recommended by the Alzheimer's Association and CMS for Medicare Annual Wellness Visit cognitive assessment. MoCA sensitivity for MCI: ~90% (Nasreddine et al., J Am Geriatr Soc 2005). The MMSE has documented educational bias that Mini-Cog avoids.
Lower Mini-Cog scores indicate higher likelihood of clinically relevant cognitive impairment.
Use for quick office or bedside cognitive screening in older adults or patients with concern for memory/function decline.
Performance can vary by education, language, and sensory impairment. It should be interpreted with broader clinical context.
Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your health.
April 21, 2026 · trust-baseline
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