S90.821A Blister (nonthermal), right foot, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S90.821 with 7th character A (initial encounter).

Applies from S90 Superficial injury of ankle, foot and toes

7th character note

• The appropriate 7th character is to be added to each code from category S90

7th character required

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

Code annotations containing back-references to S90.821A

Back-references to S90

• Type 2 Excludes: S80 Superficial injury of knee and lower leg ("superficial injury of ankle and foot (S90.-)")

Nearby codes

• S90.819A Abrasion, unspecified foot, initial encounter
• S90.819D Abrasion, unspecified foot, subsequent encounter
• S90.819S Abrasion, unspecified foot, sequela
• S90.82 Blister (nonthermal) of foot
• S90.821 Blister (nonthermal), right foot
• S90.821A Blister (nonthermal), right foot, initial encounter (this code)
• S90.821D Blister (nonthermal), right foot, subsequent encounter
• S90.821S Blister (nonthermal), right foot, sequela
• S90.822 Blister (nonthermal), left foot
• S90.822A Blister (nonthermal), left foot, initial encounter
• S90.822D Blister (nonthermal), left foot, subsequent encounter