US · guidance
CMS Pub. 100-02, ch. 15, § 240.1.4
Location of Subluxation
B3-2251.4
The precise level of the subluxation must be specified by the chiropractor to substantiate
a claim for manipulation of the spine. This designation is made in relation to the part of
the spine in which the subluxation is identified:
Area of Spine Names of Vertebrae
Number of
Vertebrae
Short Form or
Other Name
Neck Occiput 7 Occ, CO
Cervical C1 thru C7
Atlas C1
Axis C2
Back Dorsal or 12 D1 thru D12
Thoracic T1 thru T12
Costovertebral R1 thru R12
Costotransverse R1 thru R12
Low Back Lumbar 5 L1 thru L5
Pelvis IIii, r and 1 I, Si
Sacral Sacrum, Coccyx S, SC
In addition to the vertebrae and pelvic bones listed, the Ilii (R and L) are included with
the sacrum as an area where a condition may occur which would be appropriate for
chiropractic manipulative treatment.
There are two ways in which the level of the subluxation may be specified.
The exact bones may be listed, for example: C5, C6, etc.
The area may suffice if it implies only certain bones such as: Occipito-atlantal
(occiput and C1 (atlas)), lumbo-sacral (L5 and Sacrum), sacro-iliac (sacrum and
ilium).
Following are some common examples of acceptable descriptive terms for the nature of
the abnormalities:
Off-centered
Misalignment
Malpositioning
Spacing - abnormal, altered, decreased, increased
Incomplete dislocation
Rotation
Listhesis - antero, postero, retro, lateral, spondylo
Motion - limited, lost, restricted, flexion, extension, hyper mobility, hypomotility,
aberrant
Other terms may be used. If they are understood clearly to refer to bone or joint space or
position (or motion) changes of vertebral elements, they are acceptable.
History
(Rev. 1, 10-01-03)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
bef2a358cf5377fdb9b447c53b046676b820e689f6b616cd7682967396b1e7b0
The link goes to the issuing authority’s own document — the one we read to produce this record. Where a source publishes whole titles rather than sections, your browser may need a moment to jump to the provision.
Unofficial copy of government-published law, reproduced from official sources with full provenance. Not an official publication; verify against official sources before relying on it in a filing. Records in the 'guidance' corpus, and only that corpus, are sub-regulatory (interpretive guidelines, survey procedures) and are not binding law. Validity bounds follow each jurisdiction's declared temporalBasis.