ICD-10-CM 2027
ICD-10 code for lordosis
From the official ICD-10-CM alphabetic index entry “Lordosis”. Page updated September 29, 2026.
About coding lordosis
The ICD-10-CM code for lordosis is M40.50 (Lordosis, unspecified, site unspecified). The official index lists 17 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M40.50.
Within M40.5, choose M40.50 (site unspecified) only when documentation doesn't support a more specific option: thoracolumbar region (M40.55), lumbar region (M40.56) and lumbosacral region (M40.57).
Code first: underlying disease.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific lordosis codes (official index)
- acquired
- congenital Q76.429 — Congenital lordosis, unspecified region
- 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
- lumbar region M40.56 — Lordosis, unspecified, lumbar region
- lumbosacral region M40.57 — Lordosis, unspecified, lumbosacral region
- postsurgical M96.4 — Postsurgical lordosis
- postural
- rachitic (late effect) (sequelae) E64.3 — Sequelae of rickets
- sequelae of rickets E64.3 — Sequelae of rickets
- specified type NEC M40.40 — Postural lordosis, site unspecified
- lumbar region M40.46 — Postural lordosis, lumbar region
- lumbosacral region M40.47 — Postural lordosis, lumbosacral region
- thoracolumbar region M40.45 — Postural lordosis, thoracolumbar region
- thoracolumbar region M40.55 — Lordosis, unspecified, thoracolumbar region
- tuberculous A18.01 — Tuberculosis of spine
Common questions about lordosis ICD-10 codes
What is the ICD-10 code for lordosis?
- M40.50 — Lordosis, unspecified, site unspecified. More specific codes apply when the documentation supports them: Q76.429, Q76.426, Q76.427, Q76.428 and others below.
What is the ICD-10 code for congenital lordosis?
- Q76.429 — Congenital lordosis, unspecified region.
What is the ICD-10 code for lumbar region lordosis?
- M40.56 — Lordosis, unspecified, lumbar region.
What is the ICD-10 code for lumbosacral region lordosis?
- M40.57 — Lordosis, unspecified, lumbosacral region.
What is the ICD-10 code for postsurgical lordosis?
- M96.4 — Postsurgical lordosis.
What is the ICD-10 code for rachitic lordosis?
- E64.3 — Sequelae of rickets.
What is the ICD-10 code for sequelae of rickets lordosis?
- E64.3 — Sequelae of rickets.
Is M40.50 billable?
- Yes. M40.50 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M40.50 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M40.50 as a principal diagnosis.
Is M40.50 a CC or MCC?
- No. M40.50 is neither a CC nor an MCC under MS-DRG v44.0.