2027 ICD-10-CM Diagnosis Code S63.126DDislocation of interphalangeal joint of unspecified thumb, subsequent encounter

ICD-10-CM Codes›S00–T88›S60-S69›S63

ICD-10-CM S63.126D
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S63.126D is a billable ICD-10-CM diagnosis code for dislocation of interphalangeal joint of unspecified thumb, subsequent encounter. The 7th character D marks it as a subsequent encounter code, used during routine care in the healing or recovery phase. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 949 through 950. The code is exempt from POA reporting. Coders also document this condition as closed dislocation of interphalangeal joint of thumb. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Dislocations, subsequent encounter.

Code Identity

ICD-10-CM Code
S63.126D
Billable Status
Yes — Valid for Submission
Code Describes
Dislocation of interphalangeal joint of unspecified thumb, subsequent encounter
Short Description
Dislocation of interphalangeal joint of thmb, subs
Parent Code
S63.126
Dislocation of interphalangeal joint of unspecified thumb

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS60-S69Injuries to the wrist, hand and fingers
CategoryS63Dislocation and sprain of joints and ligaments at wrist and hand level
This CodeS63.126DDislocation of interphalangeal joint of unspecified thumb, subsequent encounter

Present on Admission (POA)Billing

S63.126D is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Injuries to the wrist, hand and fingers (S60-S69).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Closed dislocation of interphalangeal joint of thumb
  • Closed fracture dislocation of interphalangeal joint of thumb
  • Fracture dislocation of thumb
  • Open fracture dislocation of digit of hand
  • Open fracture dislocation of interphalangeal joint of thumb
  • Open traumatic dislocation, interphalangeal joint,thumb
  • Traumatic dislocation of interphalangeal joint of thumb

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Dislocation and sprain of joints and ligaments at wrist and hand level (S63). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to S63.126D: its own notes plus those printed at S63, block S60-S69, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From S63 Dislocation and sprain of joints and ligaments at wrist and hand level applies to 921 codes
  • 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

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From S63 Dislocation and sprain of joints and ligaments at wrist and hand level applies to 921 codes
  • strain of muscle, fascia and tendon of wrist and hand (S66.-)
From Block S60-S69 Injuries to the wrist, hand and fingers applies to 5,118 codes
  • burns and corrosions (T20-T32)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From S63 Dislocation and sprain of joints and ligaments at wrist and hand level applies to 921 codes
  • any associated open wound

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • 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.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From S63 Dislocation and sprain of joints and ligaments at wrist and hand level applies to 921 codes
  • The appropriate 7th character is to be added to each code from category S63
Values for category S63 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter this code
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name S63.126D, its category, or a range that includes it.

Excludes2 3

These codes carry an Excludes2 note naming S63.126D: its condition is not part of those codes, and both may be reported when the patient has both.

  • S63.04 Subluxation and dislocation of carpometacarpal joint of thumb
    interphalangeal subluxation and dislocation of thumb (S63.1-) names S63.1-, which includes this code
  • S63.2 Subluxation and dislocation of other finger(s)
    subluxation and dislocation of thumb (S63.1-) names S63.1-, which includes this code
  • S66 Injury of muscle, fascia and tendon at wrist and hand level
    sprain of joints and ligaments of wrist and hand (S63.-) names S63.-, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ044
Dislocations, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Dislocations

Dislocations are joint injuries that force the ends of your bones out of position. The cause is often a fall or a blow, sometimes from playing a contact sport. You can dislocate your ankles, knees, shoulders, hips, elbows and jaw. You can also dislocate your finger and toe joints.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S63.126D to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V58.89 Other specfied aftercare
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S63.126DOverview

Is S63.126D (Dislocation of interphalangeal joint of unspecified thumb) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report dislocation of interphalangeal joint of unspecified thumb, subsequent encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character D in S63.126D mean?

The final character D marks a subsequent encounter: use it for routine care while the dislocation of interphalangeal joint of unspecified thumb is healing, after active treatment has ended.

What MS-DRG does S63.126D group to?

When dislocation of interphalangeal joint of unspecified thumb, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 950, 949, with relative weights from 0.7661 to 1.1231 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S63.126D exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for dislocation of interphalangeal joint of unspecified thumb, subsequent encounter on inpatient claims. The code appears in the Injuries to the wrist, hand and fingers (S60-S69) range of the CMS exempt list.

What is the ICD-9 equivalent of S63.126D?

Under the General Equivalence Mappings, dislocation of interphalangeal joint of unspecified thumb, subsequent encounter converts to ICD-9-CM V58.89 (other specfied aftercare). The mapping is approximate, so confirm the match fits the documentation.