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S83 vs S86.392A

S83 (Dislocation and sprain of joints and ligaments of knee) compared with S86.392A (Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, initial encounter), 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 S83 lists S86.392A under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named and billing status.S83 is “Dislocation and sprain of joints and ligaments of knee”; S86.392A is “Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, initial encounter”. S83 is a non-billable header; S86.392A is billable.

Registry fact

Can these codes be reported together?

Yes, when both are documented.S83 lists S86.392A under Excludes2: “strain of muscle, fascia and tendon of lower leg (S86.-)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes2 relationship?

Yes.S83’s tabular entry: “strain of muscle, fascia and tendon of lower leg (S86.-)”. The note covers S86.392A.

Official ruleGuide: Excludes1 vs Excludes2

Is one a parent or header code?

One is a header.S83 is a non-billable header, but S86.392A is not one of its subdivisions.

Registry fact

Nothing found in 3 other checks; 1 check does not apply
Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code.

Official rule

Is one more specific?

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

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

S83
Dislocation and sprain of joints and ligaments of knee
↔
S86.392A
Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, initial encounter

What we found

Yes, when both are documented.S83 carries an Excludes2 note covering S86.392A: “strain of muscle, fascia and tendon of lower leg (S86.-)”

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
S83

Dislocation and sprain of joints and ligaments of knee

S86.392A

Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, initial encounter

StatusDiffers
S83
Non-billable header

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

Report instead: S83.001A, S83.001D, S83.001S, S83.002A, S83.002D

S86.392A
Billable
Excludes2Differs
Only at S83
  • derangement of patella (M22.0-M22.3)
  • internal derangement of knee (M23.-)
  • old dislocation of knee (M24.36)
  • pathological dislocation of knee (M24.36)
  • recurrent dislocation of knee (M22.0)
  • strain of muscle, fascia and tendon of lower leg (S86.-)
Only at S86.392A
  • injury of muscle, fascia and tendon at ankle (S96.-)
  • sprain of joints and ligaments of knee (S83.-)
Shared by both codes (5 notes)
  • injury of patellar ligament (tendon) (S76.1-)
  • burns and corrosions (T20-T32)
  • frostbite (T33-T34)
  • injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)
  • insect bite or sting, venomous (T63.4)
Code alsoDiffers
S83
  • any associated open wound
S86.392A
  • any associated open wound (S81.-)
CategoryDiffers
S83

Is itself a category

S86.392A

S86 Injury of muscle, fascia and tendon at lower leg level

ChapterSame for both

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

IncludesDiffers
S83
  • avulsion of joint or ligament of knee
  • laceration of cartilage, joint or ligament of knee
  • sprain of cartilage, joint or ligament of knee
  • traumatic hemarthrosis of joint or ligament of knee
  • traumatic rupture of joint or ligament of knee
  • traumatic subluxation of joint or ligament of knee
  • traumatic tear of joint or ligament of knee
S86.392A

None at this code

7th characterDiffers
S83
  • The appropriate 7th character is to be added to each code from category S83
S86.392A
  • The appropriate 7th character is to be added to each code from category S86

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, each code’s own notes are listed under it, and the notes every code shares are listed once beneath them.

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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