The Oswestry Disability Index (ODI) is a 10-section questionnaire that measures how much low back pain limits daily activities. Each section is scored 0 to 5, the total is divided by 50 and multiplied by 100, and the percentage maps to five bands from minimal disability (0 to 20%) to bed-bound or exaggerating (81 to 100%). If one section is skipped, divide by 45 instead. Use the calculator above, then read the guide below for interpretation, change thresholds, coding and documentation. Last checked October 2026.
How to calculate the ODI score
Add the points from the sections you answered and divide by the maximum possible for those sections. The percentage is rounded to the nearest whole number. The Oregon pain guidance version of the ODI and Scientific Spine both give the same two formulas.
| Situation | Formula | Example |
|---|---|---|
| All 10 sections answered | (total points / 50) x 100 | 25 / 50 x 100 = 50% |
| One section skipped (often section 8, sex life) | (total points / 45) x 100 | 18 / 45 x 100 = 40% |
| Two or more sections skipped | Not a standard calculation | Ask the patient to complete the form, or document that the score is incomplete |
Worked example: a patient scores 2, 1, 3, 2, 3, 2, 1, 2 and 2 across nine sections and skips section 8. The total is 18 points out of 45, which is 40% and falls in the moderate disability band.
ODI score interpretation
| Score | Category | What it describes |
|---|---|---|
| 0 to 20% | Minimal disability | The patient can cope with most living activities. Usually no treatment is indicated apart from advice on lifting, sitting and exercise |
| 21 to 40% | Moderate disability | More pain and difficulty with sitting, lifting and standing |
| 41 to 60% | Severe disability | Pain remains the main problem, but activities of daily living are affected |
| 61 to 80% | Crippled | Back pain affects all aspects of the patient's life. Positive intervention is required |
| 81 to 100% | Bed-bound or exaggerating | These patients are either bed-bound or exaggerating their symptoms |
The category wording comes from the Oregon guidance document. Treat the top band with clinical judgment: a very high score is a prompt to assess the whole patient, not a verdict. The ODI is a patient-reported measure and does not diagnose the cause of back pain.
The 10 ODI sections
Every section offers six statements scored from 0 (no limitation) to 5 (maximum limitation). The sections appear in this order on the standard questionnaire.
| # | Section | What it captures |
|---|---|---|
| 1 | Pain intensity | Pain at the moment |
| 2 | Personal care | Washing and dressing |
| 3 | Lifting | Weights lifted off the floor or from a table |
| 4 | Walking | Distance and aids |
| 5 | Sitting | Time tolerated |
| 6 | Standing | Time tolerated |
| 7 | Sleeping | Hours of sleep lost to pain |
| 8 | Sex life (if applicable) | Effect of pain on sexual activity. May be skipped, which changes the denominator to 45 |
| 9 | Social life | Going out and energetic interests |
| 10 | Travelling | Journey length |
The calculator above uses the standard English wording of all 10 sections, including section 8, so scores are comparable with published ODI data.
Minimal clinically important change in the ODI
How much the score must move before the change is meaningful depends on the source and the patient population. Use the table to pick a threshold and name it in your documentation.
| Source | Threshold | Notes |
|---|---|---|
| Ostelo et al., Spine 2008 | 10 points on the 0 to 100 scale | Recommended minimal important change. The authors also proposed that a 30% change from baseline may be considered clinically meaningful improvement |
| Oregon pain guidance version | 10 percentage points | Stated as the minimum detectable change at 90% confidence. A smaller change may be measurement error |
| Wikipedia summary of published values | 6 points (Fritz, Modified ODI); other studies 10.5 to 15 | The summary lists Copay 12.8, Davidson 10.5 or 15, and a review range of 4 to 10.5. Values differ by study and population |
Applying the 30% rule: a patient who starts at 50% reaches a clinically meaningful improvement at about 35% (a 15 point drop). A patient who starts at 20% would need to reach about 14%, which is less than the 10 point threshold, so state which rule you use. For the modified questionnaire, see our Modified Oswestry Disability Index guide.
History and versions
The ODI grew out of the Oswestry Low Back Pain Disability Questionnaire first published by Fairbank and colleagues in 1980, and the version most clinics use was described by Fairbank and Pynsent in Spine in 2000. According to Scientific Spine, four English versions exist, and some versions omit or change sections, so always record which version you used. The Modified ODI swaps the sex life item for employment and homemaking. Read our Oswestry Disability Index outcome measure guide for how to use it as a PROM in clinic.
How to administer the ODI
- Give the patient the form at the initial evaluation and at planned re-assessments.
- Tell the patient to choose the one statement in each section that best describes today.
- Check for blank sections. One skipped section is acceptable and changes the denominator to 45.
- Calculate the percentage with the tool above and record the band.
- Compare with the last score using the change threshold you have chosen.
- Document the score, the date, the version used and how it informs goals and the plan of care.
ODI documentation and coding
We found no CPT code that is specific to administering the ODI. Clinics usually record the score inside the evaluation or re-evaluation and use it to support the plan of care and medical necessity. Confirm your payers' policies. See our guides to SOAP notes and documentation and CPT codes.
| CPT | Service | How the ODI helps |
|---|---|---|
| 97161, 97162, 97163 | Physical therapy evaluation, low, moderate and high complexity | Baseline functional measure |
| 97164 | Physical therapy re-evaluation | Shows change since the last score |
| 97165, 97166, 97167 | Occupational therapy evaluation, low, moderate and high complexity | Baseline functional measure |
| 97168 | Occupational therapy re-evaluation | Shows change since the last score |
| 99202 to 99215 | Office or other outpatient visit | Supports the functional history |
Payers often ask for a validated outcome measure when you request authorization for more visits. See how UnitedHealthcare and Carelon handle therapy requests, and use the prior authorization calculator to size the workload.
ICD-10 codes for low back pain, updated
Several codes that older ODI guides list are no longer billable on their own. M54.5 became a parent code with three billable children (ICD10Data), M54.4 requires a laterality character (ICD10Data), and M48.06 requires a sixth character for neurogenic claudication (ICD10Data).
| Code | Description | Note |
|---|---|---|
| M54.50 | Low back pain, unspecified | Replaces the old M54.5 for unspecified low back pain |
| M54.51 | Vertebrogenic low back pain | Billable child of M54.5 |
| M54.59 | Other low back pain | Billable child of M54.5 |
| M54.40, M54.41, M54.42 | Lumbago with sciatica, unspecified, right, left | M54.4 alone is not billable |
| M54.16 | Radiculopathy, lumbar region | |
| M51.16 | Intervertebral disc disorders with radiculopathy, lumbar region | |
| M51.26 | Other intervertebral disc displacement, lumbar region | |
| M47.816 | Spondylosis without myelopathy or radiculopathy, lumbar region | |
| M48.061, M48.062 | Spinal stenosis, lumbar region, without or with neurogenic claudication | M48.06 alone is not billable |
| M43.06 | Spondylolysis, lumbar region |
Code to the highest specificity the documentation supports. Use our ICD-10 code library to confirm current codes.
ODI compared with other back and neck measures
| Question | Tool | Where to find it |
|---|---|---|
| How much does low back pain limit daily activity? | Oswestry Disability Index | This page |
| Is the problem in the neck? | Neck Disability Index | Neck Disability Index calculator |
| Which back pain patients are at risk of a poor outcome? | STarT Back Screening Tool | STarT Back calculator |
| More outcome measures for your clinic | PROMs library | PROMs and functional outcomes |
Collecting and trending these scores is easier when your EMR scores them automatically. Book a demo to see how.
Frequently asked questions
How do you calculate an ODI score?
Add the points from all answered sections (each 0 to 5), divide by 50, and multiply by 100. If one section is skipped, divide by 45 instead. Round to the nearest whole number.
What is a good ODI score?
Lower is better. A score of 0 to 20% is classed as minimal disability, 21 to 40% moderate, 41 to 60% severe, 61 to 80% crippled and 81 to 100% bed-bound or exaggerating symptoms.
What is the minimal clinically important change for the ODI?
Ostelo and colleagues (Spine 2008) recommended 10 points on the 0 to 100 scale and proposed that a 30% change from baseline may be considered clinically meaningful improvement. Other studies report values from about 4 to 15 points depending on the population and method.
Can I skip a section on the ODI?
Yes. One skipped section is accepted, most often section 8 (sex life), and the percentage is calculated out of 45. If more than one section is missing, ask the patient to complete the form.
What is the difference between the ODI and the Modified ODI?
The Modified ODI replaces the sex life item with employment and homemaking. Its reported change threshold in one study was lower, at 6 points. Do not compare scores across versions without noting which one you used.
Why does the ODI use labels such as Crippled?
Those are the original published labels for the 61 to 80% band. They describe functional limitation, not a clinical judgment about the patient, so explain them carefully to patients.
Is there a CPT code for the ODI?
We found no CPT code specific to the ODI. It is normally documented within the evaluation or re-evaluation. Check each payer's policy.
Is M54.5 still a valid code to report with the ODI?
M54.5 is now a parent code. Use M54.50, M54.51 or M54.59 for low back pain, and the more specific codes listed above for sciatica or stenosis.
Can the ODI be used for neck pain?
No. The ODI was designed for low back pain. Use the Neck Disability Index for neck pain.
Sources and further reading
- Fairbank JC, Pynsent PB. The Oswestry Disability Index. Spine 2000;25(22):2940-52
- Oregon Pain Guidance: Oswestry Disability Index (May 2016)
- Scientific Spine: Oswestry Disability Index
- Ostelo et al. Interpreting change scores for pain and functional status in low back pain. Spine 2008
- Wikipedia: Oswestry Disability Index
- ICD10Data: M54.5
- ICD10Data: M54.4
- ICD10Data: M48.06
This page is informational and is not medical, legal or billing advice. The calculator supports clinical judgment and does not diagnose.
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