S63.637D

Sprain of interphalangeal joint of left little finger, subsequent encounter

Billable code

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from S63.6Other and unspecified sprain of finger(s)
Excludes 1

traumatic rupture of ligament of finger at metacarpophalangeal and interphalangeal joint(s) (S63.4-)

Inherited from S63Dislocation and sprain of joints and ligaments at wrs/hnd lv
Includes

avulsion of joint or ligament at wrist and hand level laceration of cartilage, joint or ligament at wrist and hand level sprain of cartilage, joint or ligament at wrist and hand level traumatic hemarthrosis of joint or ligament at wrist and hand level traumatic rupture of joint or ligament at wrist and hand level traumatic subluxation of joint or ligament at wrist and hand level traumatic tear of joint or ligament at wrist and hand level

Excludes 2

strain of muscle, fascia and tendon of wrist and hand (S66.-)

Code also

any associated open wound

7th character

The appropriate 7th character is to be added to each code from category S63

Valid 7th characters and their meanings
CharacterMeaning
Ainitial encounter
Dsubsequent encounter
Ssequela
Inherited from S60-S69Injuries to the wrist, hand and fingers
Excludes 2

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

Inherited from chapter 19Injury, poisoning and certain other consequences of external causes
Excludes 2

birth trauma (P10-P15) obstetric trauma (O70-O71)

Use additional

code to identify any retained foreign body, if applicable (Z18.-)

Note

Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes. (T07-T88) Injury, poisoning and certain other consequences of external causes (T07-T88) (T20-T32) Burns and corrosions (T20-T32) Includes: burns (thermal) from electrical heating appliances burns (thermal) from electricity burns (thermal) from flame burns (thermal) from friction burns (thermal) from hot air and hot gases burns (thermal) from hot objects burns (thermal) from lightning burns (thermal) from radiation chemical burn [corrosion] (external) (internal) scalds Excludes2: erythema [dermatitis] ab igne (L59.0) radiation-related disorders of the skin and subcutaneous tissue (L55-L59) sunburn (L55.-)

Official Guidelines for S63.637D

FY 2026 ›

Sections that reference S63.637D

Sections whose FY 2026 text names S63.637D, its S63 category, or a range containing it — the chapter guidance above is the authoritative source.