Written and maintained by CASRAI Editorial Board
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This page describes products and general use; it is not medical advice.
A back brace is a rigid, semi-rigid or flexible support worn around the trunk. In US regulation and Medicare policy the main ways to tell back braces apart are the region of the spine they cover and how much fitting they need. This page sorts the types by those two measures, using the FDA classification regulation and Medicare’s published policy wording (checked 2026-10-30).
What is a back brace?
A back brace is a type of truncal orthosis. FDA’s regulation 21 CFR 890.3490 describes a truncal orthosis as a device intended “to support or to immobilize fractures, strains, or sprains of the neck or trunk of the body.” The examples it lists include abdominal, cervical, cervical-thoracic, lumbar, lumbo-sacral, rib fracture, sacroiliac and thoracic orthoses, plus clavicle splints. These are Class I devices (general controls), exempt from 510(k) premarket notification subject to 21 CFR 890.9, and exempt from the quality management system regulation in part 820 except for the records and complaint-file requirements of 820.35.
Who uses it: people whose clinician has ordered a back orthosis, and the clinic, orthotics and supply staff who stock, fit and document it.
What are the types of back brace?
The table sorts back braces by region. Each row is tied to the regulation or Medicare article named in its last column, and the linked guides go deeper on individual types.
| Type | Region and key difference | Source |
|---|---|---|
| Lumbar and lumbo-sacral orthoses | Named in 21 CFR 890.3490 as truncal orthoses. See LSO brace for the lumbar-sacral rigid or semi-rigid type. | 21 CFR 890.3490 |
| Thoracic-lumbar-sacral orthosis (TLSO) | Defined by posterior coverage: from the sacrococcygeal junction to just below the scapular spine. | Medicare Policy Article A52500 |
| Lumbar-sacral orthosis (LSO) | Covers the lower spine; Medicare Policy Article A52500 gives a posterior-extent definition for a TLSO but not an equivalent height definition for an LSO. See LSO brace and Jewett brace. | Medicare Policy Article A52500 |
| Body-jacket types | Characterized by a rigid plastic shell that encircles the trunk (Medicare lists coding entries L0639, L0640 and L0651 among them). | Medicare Policy Article A52500 |
| Sacroiliac orthosis | Named separately in 21 CFR 890.3490. See sacroiliac belt. | 21 CFR 890.3490 |
| Thoracic, rib fracture and abdominal orthoses | Also named in 21 CFR 890.3490 as truncal orthoses. | 21 CFR 890.3490 |
Neck supports belong to the same regulation but are a separate product class; see cervical collar types and sizing. Seat cushions and chair supports are a different category again; see what is lumbar support.
How are back braces fitted: off-the-shelf, custom fitted or custom fabricated?
Medicare Policy Article A52500 (revision effective 2024-01-23, checked 2026-10-30) uses four fitting terms. They describe how much adjustment a product needs, not how good it is.
| Term | Definition in A52500 |
|---|---|
| Prefabricated | “Manufactured in quantity without a specific beneficiary in mind.” |
| Off-the-shelf (OTS) | Requires “minimal self-adjustment for fitting at the time of delivery for appropriate use.” |
| Custom fitted | “Requires more than minimal self-adjustment at the time of delivery” |
| Custom fabricated | “Individually made for a specific patient.” |
The same article describes spinal orthoses as devices that immobilize specified areas of the spine and fit closely under clothing; it describes them as not specifically designed for beneficiaries in wheelchairs.
How to use and wear a back brace
Use and wearing instructions differ by product, so the manufacturer’s instructions for use (IFU) and the clinician who ordered the brace decide the details. The general points that the sources support are these. Medicare describes spinal orthoses as generally designed to be worn under clothing with an intimate fit. An off-the-shelf brace is one that needs only minimal self-adjustment at delivery, while a custom-fitted or custom-fabricated brace is set up for the specific patient. Questions about how long to wear a brace, or whether to wear it at all, are a matter for the ordering clinician.
Common mistakes
- Treating “back brace” as one product class. The regulation lists lumbar, lumbo-sacral, sacroiliac, thoracic, rib fracture and abdominal orthoses separately, and Medicare separates LSOs from TLSOs.
- Reading “off-the-shelf” as “no adjustment needed”. A52500 defines OTS as needing minimal self-adjustment; anything needing more is custom fitted.
- Applying Medicare vocabulary to every setting. The definitions above come from Medicare policy and are used here to explain product terms, not to state rules for other payers.
- Choosing a type by name alone. Confirm the product’s intended use in its IFU.
FAQ
What is a back brace?
A back brace is a truncal orthosis: a device intended to support or immobilize strains, sprains or fractures of the trunk, regulated by FDA as Class I under 21 CFR 890.3490.
How do you wear a back brace?
Follow the IFU supplied with the product and the instructions of the clinician who ordered it. Medicare describes spinal orthoses as generally designed to be worn under clothing, and the fitting category (off-the-shelf, custom fitted or custom fabricated) tells you how much adjustment the product needs at delivery.
How do you use a back brace?
Use depends on the product, so the manufacturer’s IFU and the ordering clinician decide. This page does not set wear time or activity limits.
Related products
For wraps and other soft supplies, see the lac.us category for elastic bandages.
Sources
- FDA, 21 CFR 890.3490 Truncal orthosis, eCFR, https://www.ecfr.gov/current/title-21/chapter-I/subchapter-H/part-890/subpart-D/section-890.3490 (checked 2026-10-30).
- CMS Medicare Coverage Database, Policy Article A52500 Spinal Orthoses: TLSO and LSO, https://www.cms.gov/medicare-coverage-database/view/article.aspx?articleid=52500 (revision effective 2024-01-23; checked 2026-10-30).
