2027 ICD-10-CM Diagnosis Code S53.126DPosterior dislocation of unspecified ulnohumeral joint, subsequent encounter

ICD-10-CM Codes›S00–T88›S50-S59›S53

ICD-10-CM S53.126D
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S53.126D is a billable ICD-10-CM diagnosis code for posterior dislocation of unspecified ulnohumeral joint, 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 posterior dislocation of elbow. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Dislocations, subsequent encounter.

Code Identity

ICD-10-CM Code
S53.126D
Billable Status
Yes — Valid for Submission
Code Describes
Posterior dislocation of unspecified ulnohumeral joint, subsequent encounter
Short Description
Posterior dislocation of unsp ulnohumeral joint, subs encntr
Parent Code
S53.126
Posterior dislocation of unspecified ulnohumeral joint

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS50-S59Injuries to the elbow and forearm
CategoryS53Dislocation and sprain of joints and ligaments of elbow
This CodeS53.126DPosterior dislocation of unspecified ulnohumeral joint, subsequent encounter

Present on Admission (POA)Billing

S53.126D is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Injuries to the elbow and forearm (S50-S59).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Closed posterior dislocation of elbow
  • Closed traumatic dislocation elbow joint, posterior
  • Open traumatic dislocation elbow joint, posterior

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Dislocation and sprain of joints and ligaments of elbow (S53). 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 S53.126D: its own notes plus those printed at S53.1, S53, block S50-S59, 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 S53 Dislocation and sprain of joints and ligaments of elbow applies to 261 codes
  • avulsion of joint or ligament of elbow
  • laceration of cartilage, joint or ligament of elbow
  • sprain of cartilage, joint or ligament of elbow
  • traumatic hemarthrosis of joint or ligament of elbow
  • traumatic rupture of joint or ligament of elbow
  • traumatic subluxation of joint or ligament of elbow
  • traumatic tear of joint or ligament of elbow

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From S53.1 Subluxation and dislocation of ulnohumeral joint applies to 108 codes
  • dislocation of radial head alone (S53.0-)

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 S53 Dislocation and sprain of joints and ligaments of elbow applies to 261 codes
  • strain of muscle, fascia and tendon at forearm level (S56.-)
From Block S50-S59 Injuries to the elbow and forearm applies to 4,362 codes
  • burns and corrosions (T20-T32)
  • frostbite (T33-T34)
  • injuries of wrist and hand (S60-S69)
  • 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 S53 Dislocation and sprain of joints and ligaments of elbow applies to 261 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 S53 Dislocation and sprain of joints and ligaments of elbow applies to 261 codes
  • The appropriate 7th character is to be added to each code from category S53
Values for category S53 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter this code
  • Ssequela

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

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 S53.126D 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 S53.126DOverview

Is S53.126D (Posterior dislocation of unspecified ulnohumeral joint) a billable code?

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

What does the 7th character D in S53.126D mean?

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

What MS-DRG does S53.126D group to?

When posterior dislocation of unspecified ulnohumeral joint, 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 S53.126D 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 posterior dislocation of unspecified ulnohumeral joint, subsequent encounter on inpatient claims. The code appears in the Injuries to the elbow and forearm (S50-S59) range of the CMS exempt list.

Can S53.126D be reported with a code from S53.0?

Not as a rule. The Excludes1 note at S53.1, which applies to S53.126D, lists "dislocation of radial head alone (S53.0-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).