M40 — Kyphosis and lordosis
Is M40 billable?
No — M40 is a non-billable header code. M40 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 31 billable codes beneath M40.
Billable codes under this header
- M40.00Postural kyphosis, site unspecified
- M40.03Postural kyphosis, cervicothoracic region
- M40.04Postural kyphosis, thoracic region
- M40.05Postural kyphosis, thoracolumbar region
- M40.10Other secondary kyphosis, site unspecified
- M40.12Other secondary kyphosis, cervical region
- M40.13Other secondary kyphosis, cervicothoracic region
- M40.14Other secondary kyphosis, thoracic region
- M40.15Other secondary kyphosis, thoracolumbar region
- M40.30Flatback syndrome, site unspecified
- M40.35Flatback syndrome, thoracolumbar region
- M40.36Flatback syndrome, lumbar region
- M40.37Flatback syndrome, lumbosacral region
- M40.40Postural lordosis, site unspecified
- M40.45Postural lordosis, thoracolumbar region
- M40.46Postural lordosis, lumbar region
- M40.47Postural lordosis, lumbosacral region
- M40.50Lordosis, unspecified, site unspecified
- M40.55Lordosis, unspecified, thoracolumbar region
- M40.56Lordosis, unspecified, lumbar region
- M40.57Lordosis, unspecified, lumbosacral region
- M40.202Unspecified kyphosis, cervical region
- M40.203Unspecified kyphosis, cervicothoracic region
- M40.204Unspecified kyphosis, thoracic region
- M40.205Unspecified kyphosis, thoracolumbar region
- M40.209Unspecified kyphosis, site unspecified
- M40.292Other kyphosis, cervical region
- M40.293Other kyphosis, cervicothoracic region
- M40.294Other kyphosis, thoracic region
- M40.295Other kyphosis, thoracolumbar region
- M40.299Other kyphosis, site unspecified
M40 at a glance
| Code | M40 |
|---|---|
| Description | Kyphosis and lordosis |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with M40 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Code first
The underlying condition below must be sequenced before M40. M40 describes a manifestation and cannot be the principal or first-listed diagnosis.
- underlying disease
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M40, but a patient may have both at the same time. When documentation supports it, M40 and the excluded code may both be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
What codes fall under M40? (6)
How long has M40 existed?
M40 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.