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M24.031 vs M26.6

M24.031 (Loose body in right wrist) compared with M26.6 (Temporomandibular joint disorders), from the official CMS tabular data.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Summary

These codes can be reported together when both conditions are documented, because M24.031 lists M26.6 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named and billing status.M24.031 is “Loose body in right wrist”; M26.6 is “Temporomandibular joint disorders”. M26.6 is a non-billable header; M24.031 is billable.

Registry fact

Can these codes be reported together?

Yes, when both are documented.M24.031 lists M26.6 under Excludes2: “temporomandibular joint disorders (M26.6-)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. M24.031 carries 1 Excludes1 note and M26.6 carries 2 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.M24.031’s tabular entry: “temporomandibular joint disorders (M26.6-)”. The note covers M26.6.

Official ruleGuide: Excludes1 vs Excludes2

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

One is a header.M26.6 is a non-billable header, but M24.031 is not one of its subdivisions.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

M24.031
Loose body in right wrist
↔
M26.6
Temporomandibular joint disorders

What we found

Yes, when both are documented.M24.031 carries an Excludes2 note covering M26.6: “temporomandibular joint disorders (M26.6-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

  • Section I.A.12.b — Excludes2 · applies to: Excludes2

    A type 2 Excludes note represents “Not included here.” An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

    ICD-10-CM Official Guidelines FY2027

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

Similar descriptions do not make codes interchangeable. The documentation and the official instructions decide which code applies.

Official descriptionDiffers
M24.031

Loose body in right wrist

M26.6

Temporomandibular joint disorders

StatusDiffers
M24.031
Billable
M26.6
Non-billable header

A header is not reported on a claim; a code beneath it is.

Report instead: M26.601, M26.602, M26.603, M26.609, M26.611

Excludes1Differs
M24.031
  • current injury - see injury of joint by body region
M26.6
  • hemifacial atrophy or hypertrophy (Q67.4)
  • unilateral condylar hyperplasia or hypoplasia (M27.8)
Excludes2Differs
M24.031
  • loose body in knee (M23.4)
  • ganglion (M67.4)
  • snapping knee (M23.8-)
  • temporomandibular joint disorders (M26.6-)
  • joints of the spine (M40-M54)
M26.6
  • current temporomandibular joint dislocation (S03.0)
  • current temporomandibular joint sprain (S03.4)
CategoryDiffers
M24.031

M24 Other specific joint derangements

M26.6

M26 Dentofacial anomalies [including malocclusion]

ChapterSame for both

M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)

No Code first, Use additional code, Code also, Includes and 7th character note at either code.

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on. In a row that differs, notes every code shares are dimmed.

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Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources