U.S. ICD-10-CM · FY 2027

M40 ICD-10-CM Code: Kyphosis and lordosis

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

M40

Kyphosis and lordosis

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where M40 sits

  1. 1

    Chapter 13

    Diseases of the musculoskeletal system and connective tissue (M00-M99)

  2. 2

    Section

    Deforming dorsopathies (M40-M43)

  3. 3

    Category M40

    Kyphosis and lordosis

  4. 4

    Code M40

    Kyphosis and lordosis

More specific choices

Codes under M40

M40 is a non-billable category. Choose the child code that best matches the documented diagnosis.

M40.0

Postural kyphosis

M40.1

Other secondary kyphosis

M40.2

Other and unspecified kyphosis

M40.3

Flatback syndrome

M40.4

Postural lordosis

M40.5

Lordosis, unspecified

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for M40.

Code first

  • underlying disease

Use additional code

No “use additional code” instruction is listed for M40.

Excludes1

Conditions that should not be reported together with this code.

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

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for M40.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code M40 mean?

M40 is the FY 2027 U.S. ICD-10-CM code for “Kyphosis and lordosis.”

Is M40 a billable or specific ICD-10-CM code?

No. M40 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is M40 located in ICD-10-CM?

M40 is listed in Chapter 13, Diseases of the musculoskeletal system and connective tissue (M00-M99), within Deforming dorsopathies (M40-M43) (M40–M43), under category M40, Kyphosis and lordosis.

What coding notes are listed for M40?

No inclusion terms are listed for M40 in this reference record. Code-first instructions: underlying disease. Excludes1 notes: congenital kyphosis and lordosis (Q76.4); kyphoscoliosis (M41.-); postprocedural kyphosis and lordosis (M96.-). No Excludes2 note is listed.

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