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S53.4 vs S56.401S

S53.4 (Sprain of elbow) compared with S56.401S (Unspecified injury of extensor muscle, fascia and tendon of right index finger at forearm level, sequela), 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 S53.4 lists S56.401S under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named and billing status.S53.4 is “Sprain of elbow”; S56.401S is “Unspecified injury of extensor muscle, fascia and tendon of right index finger at forearm level, sequela”. S53.4 is a non-billable header; S56.401S is billable.

Registry fact

Can these codes be reported together?

Yes, when both are documented.S53.4 lists S56.401S under Excludes2: “strain of muscle, fascia and tendon at forearm level (S56.-)”. 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.S53.4’s tabular entry: “strain of muscle, fascia and tendon at forearm level (S56.-)”. The note covers S56.401S.

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.S53.4 is a non-billable header, but S56.401S 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

S53.4
Sprain of elbow
↔
S56.401S
Unspecified injury of extensor muscle, fascia and tendon of right index finger at forearm level, sequela

What we found

Yes, when both are documented.S53.4 carries an Excludes2 note covering S56.401S: “strain of muscle, fascia and tendon at forearm level (S56.-)”

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
S53.4

Sprain of elbow

S56.401S

Unspecified injury of extensor muscle, fascia and tendon of right index finger at forearm level, sequela

StatusDiffers
S53.4
Non-billable header

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

Report instead: S53.401A, S53.401D, S53.401S, S53.402A, S53.402D

S56.401S
Billable
Excludes2Differs
S53.4
  • traumatic rupture of radial collateral ligament (S53.2-)
  • traumatic rupture of ulnar collateral ligament (S53.3-)
  • strain of muscle, fascia and tendon at forearm level (S56.-)
  • burns and corrosions (T20-T32)
  • frostbite (T33-T34)
  • injuries of wrist and hand (S60-S69)
  • insect bite or sting, venomous (T63.4)
S56.401S
  • 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)
Code alsoDiffers
S53.4
  • any associated open wound
S56.401S
  • any associated open wound (S51.-)
CategoryDiffers
S53.4

S53 Dislocation and sprain of joints and ligaments of elbow

S56.401S

S56 Injury of muscle, fascia and tendon at forearm level

ChapterSame for both

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

IncludesDiffers
S53.4
  • avulsion of joint or ligament of elbow
  • laceration of cartilage, joint or ligament of elbow
  • sprain of cartilage, joint or ligament of elbow
  • traumatic hemarthrosis of joint or ligament of elbow
S56.401S

None at this code

7th characterDiffers
S53.4
  • The appropriate 7th character is to be added to each code from category S53
S56.401S
  • The appropriate 7th character is to be added to each code from category S56

No Excludes1, Code first and Use additional code 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