2027 ICD-10-CM Diagnosis Code S73.122AIschiocapsular ligament sprain of left hip, initial encounter

ICD-10-CM Codes›S00–T88›S70-S79›S73

ICD-10-CM S73.122A
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S73.122A is a billable ICD-10-CM diagnosis code for ischiocapsular ligament sprain of left 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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 537 through 538, 963 through 965. Coders also document this condition as disorder of ligament of left hip joint. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sprains and strains, initial encounter.

Code Identity

ICD-10-CM Code
S73.122A
Billable Status
Yes — Valid for Submission
Code Describes
Ischiocapsular ligament sprain of left hip, initial encounter
Short Description
Ischiocapsular ligament sprain of left hip, init encntr
Parent Code
S73.122
Ischiocapsular ligament sprain of left 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 CodeS73.122AIschiocapsular ligament sprain of left hip, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorder of ligament of left hip joint
  • Ischiocapsular sprain
  • Sprain of hip
  • Sprain of left hip
  • Sprain of left ischiofemoral ligament

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 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 S73.122A: its own notes plus those printed at S73, block S70-S79, 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 S73 Dislocation and sprain of joint and ligaments of hip applies to 126 codes
  • avulsion of joint or ligament of hip
  • laceration of cartilage, joint or ligament of hip
  • sprain of cartilage, joint or ligament of hip
  • traumatic hemarthrosis of joint or ligament of hip
  • traumatic rupture of joint or ligament of hip
  • traumatic subluxation of joint or ligament of hip
  • traumatic tear of joint or ligament of hip

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 S73 Dislocation and sprain of joint and ligaments of hip applies to 126 codes
  • strain of muscle, fascia and tendon of hip and thigh (S76.-)
From Block S70-S79 Injuries to the hip and thigh applies to 3,546 codes
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 S73 Dislocation and sprain of joint and ligaments of hip applies to 126 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 S73 Dislocation and sprain of joint and ligaments of hip applies to 126 codes
  • The appropriate 7th character is to be added to each code from category S73
Values for category S73 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter this code
  • Dsubsequent encounter
  • 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 S73.122A, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming S73.122A: its condition is not part of those codes, and both may be reported when the patient has both.

  • S33 Dislocation and sprain of joints and ligaments of lumbar spine and pelvis
    dislocation and sprain of joints and ligaments of hip (S73.-) names S73.-, which includes this code
  • S76 Injury of muscle, fascia and tendon at hip and thigh level
    sprain of joint and ligament of hip (S73.1) names S73.1, which includes this code

Clinical ClassificationClinical

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

CCSR INJ024
Sprains and strains, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Hip Injuries and Disorders

Your hip is the joint where your femur (thigh bone) meets your pelvis (hip bone). There are two main parts: a ball at the end of the femur, which fits in a socket in the pelvis. Your hip is known as a ball-and-socket joint. This is because you have a ball at the end of your femur, and it fits into a socket in your pelvis.

Read the full article at MedlinePlus

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

Convert S73.122A to ICD-9-CMHistory

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

ICD-9-CM
843.1 Sprain ischiocapsular
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 S73.122AOverview

What is the ICD-10 code for ischiocapsular ligament sprain of left hip, initial encounter?

The ICD-10-CM code for ischiocapsular ligament sprain of left hip, initial encounter is S73.122A (sometimes written as S73122A). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is S73.122A (Ischiocapsular ligament sprain of left hip) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report ischiocapsular ligament sprain of left hip, initial encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character A in S73.122A mean?

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

What MS-DRG does S73.122A group to?

When ischiocapsular ligament sprain of left hip, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 964, 965, 537, 538, 963, with relative weights from 0.7118 to 2.6361 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S73.122A?

Under the General Equivalence Mappings, ischiocapsular ligament sprain of left hip, initial encounter converts to ICD-9-CM 843.1 (sprain ischiocapsular). The mapping is approximate, so confirm the match fits the documentation.