S90.522A is the authoritative medical code for Blister nonthermal, left ankle, initial encounter. This classification is used in medical billing and clinical recording to specify the clinical criteria for blister nonthermal, left ankle, initial encounter (ICD-10-CM S90.522A), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Blister nonthermal, left ankle, initial encounter is a billable ICD-10-CM diagnosis code S90.522A. Excludes2 (not included here): burns and corrosions T20-T32; fracture of ankle and malleolus S82.-; frostbite T33-T34; insect bite or sting, venomous T63.4. 7th character: The appropriate 7th character is to be added to each code from category S90.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for S90.522A in the official ICD-10-CM tabular list.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- burns and corrosions T20-T32
- fracture of ankle and malleolus S82.-
- frostbite T33-T34
- insect bite or sting, venomous T63.4
Frequently Asked Questions (FAQ) & Clinical Guidance
Does S90.522A require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category S90.
Can S90.522A be reported alongside related conditions?
Per Excludes2 instructions, S90.522A and the following may both be reported when both are present: burns and corrosions (T20-T32); fracture of ankle and malleolus (S82.-); frostbite (T33-T34); insect bite or sting, venomous (T63.4).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as S90.522A, with their registry titles.
- S90 — Superficial injury of ankle, foot and toes
- S90-S99 — Injuries to the ankle and foot (S90-S99)
- S90.0 — Contusion of ankle
- S90.00 — Contusion of unspecified ankle
- S90.00A — Contusion of unspecified ankle, initial encounter
- S90.00D — Contusion of unspecified ankle, subsequent encounter
- S90.00S — Contusion of unspecified ankle, sequela
- S90.00XA — Contusion of unspecified ankle, initial encounter
- S90.00XD — Contusion of unspecified ankle, subsequent encounter
- S90.00XS — Contusion of unspecified ankle, sequela
- S90.01 — Contusion of right ankle
- S90.01A — Contusion of right ankle, initial encounter
- S90.01D — Contusion of right ankle, subsequent encounter
- S90.01S — Contusion of right ankle, sequela
- S90.01XA — Contusion of right ankle, initial encounter
- S90.01XD — Contusion of right ankle, subsequent encounter
- S90.01XS — Contusion of right ankle, sequela
- S90.02 — Contusion of left ankle
- S90.02A — Contusion of left ankle, initial encounter
- S90.02D — Contusion of left ankle, subsequent encounter
- S90.02S — Contusion of left ankle, sequela
- S90.02XA — Contusion of left ankle, initial encounter
- S90.02XD — Contusion of left ankle, subsequent encounter
- S90.02XS — Contusion of left ankle, sequela
- S90.1 — Contusion of toe without damage to nail
- S90.11 — Contusion of great toe without damage to nail
- S90.111 — Contusion of right great toe without damage to nail
- S90.111A — Contusion of right great toe without damage to nail, initial encounter
- S90.111D — Contusion of right great toe without damage to nail, subsequent encounter
- S90.111S — Contusion of right great toe without damage to nail, sequela
- S90.112 — Contusion of left great toe without damage to nail
- S90.112A — Contusion of left great toe without damage to nail, initial encounter
- S90.112D — Contusion of left great toe without damage to nail, subsequent encounter
- S90.112S — Contusion of left great toe without damage to nail, sequela
- S90.119 — Contusion of unspecified great toe without damage to nail
- S90.119A — Contusion of unspecified great toe without damage to nail, initial encounter
- S90.119D — Contusion of unspecified great toe without damage to nail, subsequent encounter
- S90.119S — Contusion of unspecified great toe without damage to nail, sequela
- S90.12 — Contusion of lesser toe without damage to nail
- S90.121 — Contusion of right lesser toe(s) without damage to nail
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code S92.522A
Displaced fracture of middle phalanx of left lesser toe(s), initial encounter for closed fracture
ICD Code S93.522A
Sprain of metatarsophalangeal joint of left great toe, initial encounter