S61.05 – Open bite of thumb without damage to nail

ICD-10-CM 2027 diagnosis code · Injuries to the wrist, hand and fingers

Non-billable header

ICD-10-CM code S61.05

Code: S61.05 (claims format: S6105)
Description: Open bite of thumb without damage to nail
Billable: No – use a more specific code below
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: S60-S69 Injuries to the wrist, hand and fingers
Parent codes: S61 › S61.0

Billable codes under S61.05

S61.05 is a header code and cannot be used on claims. Choose the most specific code:

S61.051 – Open bite of right thumb without damage to nailHeader (more codes below)
S61.052 – Open bite of left thumb without damage to nailHeader (more codes below)
S61.059 – Open bite of unspecified thumb without damage to nailHeader (more codes below)

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

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

Notes for S61.05

Applicable to:

Bite of thumb NOS

Excludes1 (not coded here):

superficial bite of thumb (S60.36-, S60.37-)

Notes inherited from parent codes

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

S61 – Open wound of wrist, hand and fingers

Excludes1 (not coded here):

open fracture of wrist, hand and finger (S62.- with 7th character B)
traumatic amputation of wrist and hand (S68.-)

Code also:

any associated wound infection

7th character note:

The appropriate 7th character is to be added to each code from category S61

S61.0 – Open wound of thumb without damage to nail

Excludes1 (not coded here):

open wound of thumb with damage to nail (S61.1-)

Block S60-S69

Excludes2 (not included here):

burns and corrosions (T20-T32)
frostbite (T33-T34)
insect bite or sting, venomous (T63.4)

Index terms for S61.05

Entries in the ICD-10-CM alphabetic index that lead to this code:

Bite, thumb

Related codes in S61.0

Frequently asked questions

What is ICD-10 code S61.05?

S61.05 is the ICD-10-CM code for open bite of thumb without damage to nail, in the block S60-S69 (Injuries to the wrist, hand and fingers).

Is S61.05 a billable code?

No. S61.05 is a header code with more specific child codes; report one of the billable codes listed above.

What category does S61.05 belong to?

It belongs to category S61 – Open wound of wrist, hand and fingers.

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.