S90.521 is the authoritative medical code for Blister nonthermal, right ankle. This classification is used in medical billing and clinical recording to specify the clinical criteria for blister nonthermal, right ankle (ICD-10-CM S90.521), ensuring healthcare documentation aligns with current federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Blister nonthermal, right ankle is a non-billable ICD-10-CM category code S90.521. A more specific billable subcode must be selected for claims submission. 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 S90.521 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
Can S90.521 be billed directly?
No. S90.521 (Blister nonthermal, right ankle) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does S90.521 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category S90.
Can S90.521 be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, S90.521 and the following are not considered part of each other and may both be reported when both conditions are present: burns and corrosions (T20-T32); fracture of ankle and malleolus (S82.-); frostbite (T33-T34); insect bite or sting, venomous (T63.4).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to S90.521 in its code family, with their registry titles.
- S90.121 — Contusion of right lesser toe(s) without damage to nail
- S90.121A — Contusion of right lesser toe(s) without damage to nail, initial encounter
- S90.121D — Contusion of right lesser toe(s) without damage to nail, subsequent encounter
- S90.121S — Contusion of right lesser toe(s) without damage to nail, sequela
- S90.122 — Contusion of left lesser toe(s) without damage to nail
- S90.122A — Contusion of left lesser toe(s) without damage to nail, initial encounter
- S90.122D — Contusion of left lesser toe(s) without damage to nail, subsequent encounter
- S90.122S — Contusion of left lesser toe(s) without damage to nail, sequela
- S90.129 — Contusion of unspecified lesser toe(s) without damage to nail
- S90.129A — Contusion of unspecified lesser toe(s) without damage to nail, initial encounter
View all 40 codes in the S90 family