S46.399A Other injury of muscle, fascia and tendon of triceps, unspecified arm, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S46.399 with 7th character A (initial encounter).

Applies from S46 Injury of muscle, fascia and tendon at shoulder and upper arm level

Excludes2 (not included here)

• 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.-)

7th character note

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

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Code annotations containing back-references to S46.399A

Back-references to S46

• Type 2 Excludes: S43 Dislocation and sprain of joints and ligaments of shoulder girdle ("strain of muscle, fascia and tendon of shoulder and upper arm (S46.-)")

Nearby codes

• S46.392 Other injury of muscle, fascia and tendon of triceps, left arm
• S46.392A Other injury of muscle, fascia and tendon of triceps, left arm, initial encounter
• S46.392D Other injury of muscle, fascia and tendon of triceps, left arm, subsequent encounter
• S46.392S Other injury of muscle, fascia and tendon of triceps, left arm, sequela
• S46.399 Other injury of muscle, fascia and tendon of triceps, unspecified arm
• S46.399A Other injury of muscle, fascia and tendon of triceps, unspecified arm, initial encounter (this code)
• S46.399D Other injury of muscle, fascia and tendon of triceps, unspecified arm, subsequent encounter
• S46.399S Other injury of muscle, fascia and tendon of triceps, unspecified arm, sequela
• S46.8 Injury of other muscles, fascia and tendons at shoulder and upper arm level
• S46.80 Unspecified injury of other muscles, fascia and tendons at shoulder and upper arm level
• S46.801 Unspecified injury of other muscles, fascia and tendons at shoulder and upper arm level, right arm