2026 ICD-10-CM Diagnosis Code S73.046ACentral dislocation of unspecified hip, initial encounter

ICD-10-CM Codes›S00–T88›S70-S79›S73

ICD-10-CM S73.046A
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S73.046A is a billable ICD-10-CM diagnosis code for central dislocation of unspecified hip, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 537 through 538, 963 through 965. The code is flagged as an unspecified code, since codes identifying laterality exist in the same family. Coders also document this condition as central fracture dislocation acetabulum. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Dislocations, initial encounter.

Code Identity

ICD-10-CM Code
S73.046A
Billable Status
Yes — Valid for Submission
Code Describes
Central dislocation of unspecified hip, initial encounter
Short Description
Central dislocation of unspecified hip, initial encounter
Same as the full description in the CMS dataset.
Parent Code
S73.046
Central dislocation of unspecified hip

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS70-S79Injuries to the hip and thigh
CategoryS73Dislocation and sprain of joint and ligaments of hip
This CodeS73.046ACentral dislocation of unspecified hip, initial encounter

Code EditsBilling

Medicare Code Editor checks that affect claim validity for S73.046A.

Unspecified codes
Unspecified codes exist in the ICD-10-CM classification for circumstances when documentation in the medical record does not provide the level of detail needed to support reporting a more specific code. However, in the inpatient setting, there should generally be very limited and rare circumstances for which the laterality (right, left, bilateral) of a condition is unable to be documented and reported. The following pages contain the list of unspecified ICD-10-CM diagnosis codes for which there is a more specific code to identify laterality (right, left, bilateral) within that code family.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Central fracture dislocation acetabulum
  • Central traumatic dislocation of hip
  • Fracture dislocation of hip joint

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Dislocation and sprain of joint and ligaments of hip (S73). 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 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

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

CCSR INJ007
Dislocations, initial 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 S73.046A to ICD-9-CMHistory

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

ICD-9-CM
835.00 Dislocat hip NOS-closed
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S73.046AOverview

Is S73.046A (Central dislocation of unspecified hip) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report central dislocation of unspecified hip, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in S73.046A mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for central dislocation of unspecified hip, such as an emergency visit or first evaluation.

What MS-DRG does S73.046A group to?

When central dislocation of unspecified hip, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 537, 538, 963, 964, 965, with relative weights from 0.7203 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S73.046A?

Under the General Equivalence Mappings, central dislocation of unspecified hip, initial encounter converts to ICD-9-CM 835.00 (dislocat hip NOS-closed). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.