M40Header code — not billable
Kyphosis and lordosis
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M40
- Effective date
- October 1, 2026
Related codes in category M40
M40.0Postural kyphosisM40.00Postural kyphosis, site unspecifiedYesM40.03Postural kyphosis, cervicothoracic regionYesM40.04Postural kyphosis, thoracic regionYesM40.05Postural kyphosis, thoracolumbar regionYesM40.1Other secondary kyphosisM40.10Other secondary kyphosis, site unspecifiedYesM40.12Other secondary kyphosis, cervical regionYesM40.13Other secondary kyphosis, cervicothoracic regionYesM40.14Other secondary kyphosis, thoracic regionYesM40.15Other secondary kyphosis, thoracolumbar regionYesM40.2Other and unspecified kyphosis
Frequently asked questions
What is ICD-10 code M40?
M40 is an ICD-10-CM diagnosis code for Kyphosis and lordosis.
Is M40 a billable code?
No. M40 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is M40 in?
M40 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M40 become effective?
M40 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M40?
M40 belongs to category M40, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.