ICD-10 Code for Discitis
The ICD-10-CM code for discitis is M46.40 — Discitis, unspecified, site unspecified. This is the code the Alphabetic Index gives for discitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
M46.40 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which discitis code should you use?
The Alphabetic Index lists 10 codes under Discitis, diskitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| cervical region | M46.42 | Discitis, unspecified, cervical region | |
| cervicothoracic region | M46.43 | Discitis, unspecified, cervicothoracic region | |
| lumbar region | M46.46 | Discitis, unspecified, lumbar region | |
| lumbosacral region | M46.47 | Discitis, unspecified, lumbosacral region | |
| multiple sites | M46.49 | Discitis, unspecified, multiple sites in spine | |
| occipito-atlanto-axial region | M46.41 | Discitis, unspecified, occipito-atlanto-axial region | |
| sacrococcygeal region | M46.48 | Discitis, unspecified, sacral and sacrococcygeal region | |
| thoracic region | M46.44 | Discitis, unspecified, thoracic region | |
| thoracolumbar region | M46.45 | Discitis, unspecified, thoracolumbar region |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources