Pittsburgh Sleep Quality Index (PSQI)

The Pittsburgh Sleep Quality Index (PSQI) is a 19-item self-report questionnaire that measures subjective sleep quality and disturbance over the prior month across seven components. It takes 5–10 minutes to complete and yields a global score of 0–21, with scores greater than 5 commonly used to distinguish poor sleepers from good sleepers.

What the PSQI Measures

The PSQI asks patients to rate their sleep over the past four weeks across seven component domains:

1. Subjective sleep quality — the patient's overall rating of how well they slept
2. Sleep latency — how long it takes to fall asleep
3. Sleep duration — total hours of actual sleep per night
4. Habitual sleep efficiency — the ratio of time asleep to time in bed
5. Sleep disturbances — frequency of nighttime awakenings, pain, breathing trouble, or other interruptions
6. Use of sleep medication — frequency of medication use to aid sleep
7. Daytime dysfunction — difficulty staying awake or maintaining enthusiasm during the day

Each component is scored 0–3, and the seven component scores sum to a global PSQI score ranging from 0 to 21. Higher scores indicate worse sleep quality.

Administration Time and Format

The PSQI is a paper or digital self-report instrument, typically completed by the patient in 5–10 minutes without clinician assistance. It can be administered in-office as part of an intake or follow-up visit, or delivered remotely between visits as part of a between-visit monitoring protocol — the format that supports Remote Therapeutic Monitoring documentation.

Scoring and Interpretation

A global PSQI score above 5 is the well-established, widely validated cutoff for identifying poor sleepers, derived from the instrument's original validation work by Buysse and colleagues. This threshold has demonstrated good sensitivity and specificity in clinical samples, though the optimal cutoff can vary somewhat depending on the population studied. Because the PSQI is a self-report screening tool rather than a diagnostic instrument, a score above 5 should prompt clinical follow-up — further history, screening for a primary sleep disorder, or referral — rather than stand alone as a diagnosis. For general reference on the instrument's structure and scoring conventions, see the Center for Sleep and Circadian Science and the RehabMeasures Database.

Because the PSQI reflects the prior month, serial administration is more useful for tracking trend and treatment response than any single score in isolation — a pattern especially relevant when sleep disruption is being monitored as a recovery modulator rather than an isolated complaint.

Clinical Use Case

Sleep disruption is a common and clinically significant comorbidity after concussion and mild traumatic brain injury — it can slow cognitive recovery, worsen mood symptoms, and amplify headache and fatigue. The PSQI is frequently used to screen and monitor sleep quality as part of a broader post-concussion symptom picture, alongside instruments like the PCSS for overall symptom burden, the PHQ-9 for depressive symptoms, and the GAD-7 for anxiety. It is also relevant in mental health and cognitive health monitoring more broadly, since untreated sleep dysfunction can confound interpretation of both mood screening and cognitive testing results.

For a deeper look at this specific comorbidity, see Sleep Dysfunction After Concussion.

CPT Billing Considerations

As a brief self-report instrument, the PSQI is typically not billed as a standalone neurocognitive testing code. In most protocols it is bundled into the evaluation and management (E/M) visit during which it is reviewed, similar to other symptom-rating scales. When the PSQI is administered as one component of a broader technician-administered assessment battery — alongside cognitive performance measures — it may fall under the test administration and scoring codes 96138/96139 rather than being billed in isolation.

When the PSQI (or a similar sleep screen) is delivered digitally between visits as part of a structured monitoring program, that delivery and the clinical review time it generates is the kind of activity that can support Remote Therapeutic Monitoring billing under codes such as 98978 and 98980/98981, depending on setup, device data, and time documented. See the general CPT overview for psychological and neuropsychological testing from CMS for the broader code family context.

This page provides general educational information about CPT and RTM billing codes. It is not coding advice, a guarantee of reimbursement, or a substitute for your own compliance review. Payer coverage and documentation requirements vary by plan and can change — verify current requirements with CMS, your Medicare Administrative Contractor, and each payer before billing.

Where PSQI Sits in the Kavera Protocol

Within Kavera's assessment battery, the PSQI is one of the sleep-focused instruments delivered as part of between-visit monitoring, most often within the Concussion and Mental Health modules where sleep disruption commonly co-occurs with other symptom domains. It is administered alongside symptom scales and mood/anxiety screens so clinicians can see sleep trend data in the same dashboard as cognitive and symptom trajectory data, rather than as an isolated, disconnected form.

How Kavera Handles This

PSQI runs at baseline and on your cadence so sleep disruption after concussion or during cognitive decline is tracked, not guessed. Kavera computes the seven components and total, flags the >5 cutoff, and shows sleep beside mood and symptoms on one screen. Self-Serve practices run this with their own staff. On Managed, our team runs it and bills it under your credentials.