S90.445S – External constriction, left lesser toe(s), sequela

ICD-10-CM 2027 diagnosis code · Injuries to the ankle and foot

Billable code

ICD-10-CM code S90.445S

Code: S90.445S (claims format: S90445S)
Description: External constriction, left lesser toe(s), sequela
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: S90-S99 Injuries to the ankle and foot
Parent codes: S90 › S90.4 › S90.44 › S90.445

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care.

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

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

S90.44 – External constriction of toe

Applicable to:

Hair tourniquet syndrome of toe

Block S90-S99

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)

Related codes in S90.445

Frequently asked questions

What is ICD-10 code S90.445S?

S90.445S is the ICD-10-CM code for external constriction, left lesser toe(s), sequela, in the block S90-S99 (Injuries to the ankle and foot).

Is S90.445S a billable code?

Yes. S90.445S is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does S90.445S belong to?

It belongs to category S90 – Superficial injury of ankle, foot and toes.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.