S56.409S – Unspecified injury of extensor muscle, fascia and tendon of unspecified finger at forearm level, sequela

ICD-10-CM 2027 diagnosis code · Injuries to the elbow and forearm

Billable code

ICD-10-CM code S56.409S

Code: S56.409S (claims format: S56409S)
Description: Unspecified injury of extensor muscle, fascia and tendon of unspecified finger at forearm level, sequela
Short description: Unsp inj extn musc/fasc/tend unsp finger at forarm lv, sqla
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: S50-S59 Injuries to the elbow and forearm
Parent codes: S56 › S56.4 › S56.40 › S56.409

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.

S56 – Injury of muscle, fascia and tendon at forearm level

Excludes2 (not included here):

injury of muscle, fascia and tendon at or below wrist (S66.-)
sprain of joints and ligaments of elbow (S53.4-)

Code also:

any associated open wound (S51.-)

7th character note:

The appropriate 7th character is to be added to each code from category S56

Block S50-S59

Excludes2 (not included here):

burns and corrosions (T20-T32)
frostbite (T33-T34)
injuries of wrist and hand (S60-S69)
insect bite or sting, venomous (T63.4)

Related codes in S56.409

Frequently asked questions

What is ICD-10 code S56.409S?

S56.409S is the ICD-10-CM code for unspecified injury of extensor muscle, fascia and tendon of unspecified finger at forearm level, sequela, in the block S50-S59 (Injuries to the elbow and forearm).

Is S56.409S a billable code?

Yes. S56.409S is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does S56.409S belong to?

It belongs to category S56 – Injury of muscle, fascia and tendon at forearm level.

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.