ICD-10 Code for Lordosis
The ICD-10-CM code for lordosis is M40.50 — Lordosis, unspecified, site unspecified. This is the code the Alphabetic Index gives for lordosis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
M40.50 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which lordosis code should you use?
The Alphabetic Index lists 16 codes under Lordosis. 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
| congenital | Q76.429 | Congenital lordosis, unspecified region | |
| lumbar region | M40.56 | Lordosis, unspecified, lumbar region | |
| lumbosacral region | M40.57 | Lordosis, unspecified, lumbosacral region | |
| postsurgical | M96.4 | Postsurgical lordosis | |
| rachitic | E64.3 | Sequelae of rickets | |
| sequelae of rickets | E64.3 | Sequelae of rickets | |
| specified type NEC | M40.40 | Postural lordosis, site unspecified | |
| thoracolumbar region | M40.55 | Lordosis, unspecified, thoracolumbar region | |
| tuberculous | A18.01 | Tuberculosis of spine |
Lordosis congenital
| lumbar region | Q76.426 | Congenital lordosis, lumbar region | |
| lumbosacral region | Q76.427 | Congenital lordosis, lumbosacral region | |
| sacral region | Q76.428 | Congenital lordosis, sacral and sacrococcygeal region | |
| sacrococcygeal region | Q76.428 | Congenital lordosis, sacral and sacrococcygeal region | |
| thoracolumbar region | Q76.425 | Congenital lordosis, 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