10ICD Code Hub

M40

Header — not billable

Kyphosis and lordosis

The ICD-10 code for kyphosis and lordosis is M40.

M40 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 6 more specific codes below.

Clinical notes

Code first

This code represents a manifestation of an underlying disease. Coding convention requires the underlying (etiology) code to be sequenced first, with this code listed second.

  • underlying disease

Excludes1 (not coded here)

An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).

  • congenital kyphosis and lordosis (Q76.4)
  • kyphoscoliosis (M41.-)
  • postprocedural kyphosis and lordosis (M96.-)

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

Child codes under M40

Related codes in this category