2022 ICD-10-CM Diagnosis Code M40.3

Flatback syndrome

    2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
  • M40.3 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2022 edition of ICD-10-CM M40.3 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of M40.3 - other international versions of ICD-10 M40.3 may differ.
The following code(s) above M40.3 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to M40.3:
  • M00-M99
    2022 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
    Type 2 Excludes
    • 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)
    Diseases of the musculoskeletal system and connective tissue
  • M40
    ICD-10-CM Diagnosis Code M40

    Kyphosis and lordosis

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Code First
    • underlying disease
    Type 1 Excludes
    • congenital kyphosis and lordosis (Q76.4)
    • kyphoscoliosis (M41.-)
    • postprocedural kyphosis and lordosis (M96.-)
    Kyphosis and lordosis
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
ICD-10-CM Codes Adjacent To M40.3
M40.203 …… cervicothoracic region
M40.204 …… thoracic region
M40.205 …… thoracolumbar region
M40.209 …… site unspecified
M40.29 Other kyphosis
M40.292 …… cervical region
M40.293 …… cervicothoracic region
M40.294 …… thoracic region
M40.295 …… thoracolumbar region
M40.299 …… site unspecified
M40.3 Flatback syndrome
M40.30 …… site unspecified
M40.35 …… thoracolumbar region
M40.36 …… lumbar region
M40.37 …… lumbosacral region
M40.4 Postural lordosis
M40.40 …… site unspecified
M40.45 …… thoracolumbar region
M40.46 …… lumbar region
M40.47 …… lumbosacral region
M40.5 Lordosis, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.