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S56.107 vs T20

S56.107 (Unspecified injury of flexor muscle, fascia and tendon of right little finger at forearm level) compared with T20 (Burn and corrosion of head, face, and neck), 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 S56.107 lists T20 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named.S56.107 is “Unspecified injury of flexor muscle, fascia and tendon of right little finger at forearm level”; T20 is “Burn and corrosion of head, face, and neck”.

Registry fact

Can these codes be reported together?

Yes, when both are documented.S56.107 lists T20 under Excludes2: “burns and corrosions (T20-T32)”. 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.

Official rule

Is there an Excludes2 relationship?

Yes.S56.107’s tabular entry: “burns and corrosions (T20-T32)”. The note covers T20.

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?

Both are headers.Both are non-billable headers, and neither contains the other.

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

S56.107
Unspecified injury of flexor muscle, fascia and tendon of right little finger at forearm level
↔
T20
Burn and corrosion of head, face, and neck

What we found

Yes, when both are documented.S56.107 carries an Excludes2 note covering T20: “burns and corrosions (T20-T32)”

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
S56.107

Unspecified injury of flexor muscle, fascia and tendon of right little finger at forearm level

T20

Burn and corrosion of head, face, and neck

StatusDiffers
S56.107
Non-billable header

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

Report instead: S56.107A, S56.107D, S56.107S

T20
Non-billable header

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

Report instead: T20.00XA, T20.00XD, T20.00XS, T20.011A, T20.011D

Excludes2Differs
S56.107
  • injury of muscle, fascia and tendon at or below wrist (S66.-)
  • sprain of joints and ligaments of elbow (S53.4-)
  • burns and corrosions (T20-T32)
  • frostbite (T33-T34)
  • injuries of wrist and hand (S60-S69)
  • insect bite or sting, venomous (T63.4)
T20
  • burn and corrosion of ear drum (T28.41, T28.91)
  • burn and corrosion of eye and adnexa (T26.-)
  • burn and corrosion of mouth and pharynx (T28.0)
Use additional codeDiffers
S56.107

None at this code

T20
  • code from category T31 or T32 to identify extent of body surface involved
Code alsoDiffers
S56.107
  • any associated open wound (S51.-)
T20

None at this code

CategoryDiffers
S56.107

S56 Injury of muscle, fascia and tendon at forearm level

T20

Is itself a category

ChapterSame for both

S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)

IncludesDiffers
S56.107

None at this code

T20
  • burns and corrosions of first degree [erythema]
  • burns and corrosions of second degree [blisters][epidermal loss]
  • burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]
7th characterDiffers
S56.107
  • The appropriate 7th character is to be added to each code from category S56
T20
  • The appropriate 7th character is to be added to each code from category T20

No Excludes1 and Code first 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