M40 – Kyphosis and lordosis
ICD-10-CM 2027 diagnosis code · Deforming dorsopathies
ICD-10-CM code
M40
- Code
M40(claims format:M40)- Description
- Kyphosis and lordosis
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M40-M43 Deforming dorsopathies
Billable codes under M40
M40 is a header code and cannot be used on claims. Choose the most specific code:
- M40.0 – Postural kyphosisHeader (more codes below)
- M40.1 – Other secondary kyphosisHeader (more codes below)
- M40.2 – Other and unspecified kyphosisHeader (more codes below)
- M40.3 – Flatback syndromeHeader (more codes below)
- M40.4 – Postural lordosisHeader (more codes below)
- M40.5 – Lordosis, unspecifiedHeader (more codes below)
Notes for M40
Excludes1 (not coded here):
Code first:
- underlying disease
Frequently asked questions
What is ICD-10 code M40?
M40 is the ICD-10-CM code for kyphosis and lordosis, in the block M40-M43 (Deforming dorsopathies).
Is M40 a billable code?
No. M40 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.