M40.30 ICD-10-CA code: Flatback syndrome, multiple sites in spine
M40.30 is the ICD-10-CA code for “Flatback syndrome, multiple sites in spine” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
M40.30Flatback syndrome, multiple sites in spine
Short description: Flatback syndrome mult sites in spine
ICD-10-CA · Canada · Also written M4030
Notes for M40.30
As CIHI prints them, with any note M40.30 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Kyphoscoliosis (M41.-)kyphosis and lordosis:• congenital (Q76.4)• postprocedural (M96.-)From M40 Kyphosis and lordosis
- Certain:• conditions originating in the perinatal period (P00-P96)• disorders of the temporomandibular joint (K07.6)• infectious and parasitic diseases (A00-B99)compartment syndrome (T79.6)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
Note
- The following fifth characters represent the following sites of involvement:0 Multiple sites1 Shoulder region: clavical , scapula — joint acromioclavicular, glenohumeral, sternoclavicular2 Upper arm: humerus — elbow joint,3 Forearm: radius , ulna — wrist joint,4 Hand: carpus, fingers, metacarpus — joints between these bones,5 Pelvic region and thigh: buttock , femur , pelvis — joint hip , sacroiliac6 Lower leg: fibula , tibia — knee joint7 Ankle and foot: metatarsus, tarsus, toes — other joints in foot8 Other:head neck ribs skull trunk vertebral column9 Site unspecifiedFrom Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
Where M40.30 sits
- 1ChapterChapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
- 2Block M40-M54Dorsopathies
- 3Block M40-M43Deforming dorsopathies
- 4Category M40Kyphosis and lordosis
- 5Subcategory M40.3Flatback syndrome
- 6Valid code M40.30Flatback syndrome, multiple sites in spine
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code M40.30 mean?
M40.30 is the ICD-10-CA code for “Flatback syndrome, multiple sites in spine” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is M40.30 in ICD-10-CA?
M40.30 sits under M40.3 Flatback syndrome, within M40 Kyphosis and lordosis, within M40-M43 Deforming dorsopathies, within M40-M54 Dorsopathies, within Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99).
What coding notes apply to M40.30?
ICD-10-CA lists Excludes, Note notes for M40.30, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.