S20.121A Blister (nonthermal) of breast, right breast, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S20.121 with 7th character A (initial encounter).

Applies from S20 Superficial injury of thorax

7th character note

• The appropriate 7th character is to be added to each code from category S20

7th character required

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

Nearby codes

• S20.119A Abrasion of breast, unspecified breast, initial encounter
• S20.119D Abrasion of breast, unspecified breast, subsequent encounter
• S20.119S Abrasion of breast, unspecified breast, sequela
• S20.12 Blister (nonthermal) of breast
• S20.121 Blister (nonthermal) of breast, right breast
• S20.121A Blister (nonthermal) of breast, right breast, initial encounter (this code)
• S20.121D Blister (nonthermal) of breast, right breast, subsequent encounter
• S20.121S Blister (nonthermal) of breast, right breast, sequela
• S20.122 Blister (nonthermal) of breast, left breast
• S20.122A Blister (nonthermal) of breast, left breast, initial encounter
• S20.122D Blister (nonthermal) of breast, left breast, subsequent encounter