ICD-10-CM 2027 diagnosis code

S46.321Laceration of muscle, fascia and tendon of triceps, right arm

Not billable — use a more specific codeRequires 7th character

S46.321 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.Short description: Laceration of musc/fasc/tend triceps, right arm

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S46.321

S46.321 is the ICD-10-CM diagnosis code for laceration of muscle, fascia and tendon of triceps, right arm. It belongs to category S46 (injury of muscle, fascia and tendon at shoulder and upper arm level), block S40-S49 (injuries to the shoulder and upper arm) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within S46.32 (laceration of muscle, fascia and tendon of triceps), S46.321 is specifically for laceration of muscle, fascia and tendon of triceps, right arm. Related codes cover left arm (S46.322) and unspecified arm (S46.329).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category S46

Ainitial encounterS46.321A
Dsubsequent encounterS46.321D
SsequelaS46.321S

Notes that apply from higher levels

Instructions written at a parent level also apply to S46.321.

› From S46 Injury of muscle, fascia and tendon at shoulder and upper arm level

Excludes2

injury of muscle, fascia and tendon at elbow (S56.-)
sprain of joints and ligaments of shoulder girdle (S43.9)

Code also

any associated open wound (S41.-)

Broader instructions also apply from S40-S49 Injuries to the shoulder and upper arm and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Code history

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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about S46.321

Is S46.321 billable?: No. S46.321 is a header code. Report one of its more specific subcodes instead.