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U.S. ICD-10-CM · FY 2027

S42.121K ICD-10-CM Code: Displaced fracture of acromial process, right shoulder, subsequent encounter for fracture with nonunion

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

Code definition

Official description

S42.121K

Displaced fracture of acromial process, right shoulder, subsequent encounter for fracture with nonunion

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

Classification

Where S42.121K sits

  1. 1

    Chapter 19

    Injury, poisoning and certain other consequences of external causes (S00-T88)

  2. 2

    Section

    Injuries to the shoulder and upper arm (S40-S49)

  3. 3

    Category S42

    Fracture of shoulder and upper arm

  4. 4

    Subcategory S42.121

    Displaced fracture of acromial process, right shoulder

  5. 5

    Code S42.121K

    Displaced fracture of acromial process, right shoulder, subsequent encounter for fracture with nonunion

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for S42.121K.

Code first

No “code first” instruction is listed for S42.121K.

Use additional code

No “use additional code” instruction is listed for S42.121K.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for S42.121K.

Excludes2

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

No Excludes2 note is listed for S42.121K.

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 S42.121K mean?

S42.121K is the FY 2027 U.S. ICD-10-CM code for “Displaced fracture of acromial process, right shoulder, subsequent encounter for fracture with nonunion.”

Is S42.121K a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, S42.121K has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is S42.121K located in ICD-10-CM?

S42.121K is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Injuries to the shoulder and upper arm (S40-S49) (S40–S49), under category S42, Fracture of shoulder and upper arm and subcategory S42.121, Displaced fracture of acromial process, right shoulder.

What coding notes are listed for S42.121K?

No inclusion terms are listed for S42.121K in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

Keep exploring

Related S42.121 codes

S42.121A

Displaced fracture of acromial process, right shoulder, initial encounter for closed fracture

S42.121B

Displaced fracture of acromial process, right shoulder, initial encounter for open fracture

S42.121D

Displaced fracture of acromial process, right shoulder, subsequent encounter for fracture with routine healing

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