2027 ICD-10-CM Diagnosis Code S77.10XACrushing injury of unspecified thigh, initial encounter

ICD-10-CM Codes›S00–T88›S70-S79›S77

ICD-10-CM S77.10XA
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S77.10XA is a billable ICD-10-CM diagnosis code for crushing injury of unspecified thigh, 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 913 through 914, 963 through 965. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 6 closely related codes. The code is flagged as an unspecified code, since codes identifying laterality exist in the same family. Coders also document this condition as closed crush injury, thigh. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Crushing injury, initial encounter.

Code Identity

ICD-10-CM Code
S77.10XA
Billable Status
Yes — Valid for Submission
Code Describes
Crushing injury of unspecified thigh, initial encounter
Short Description
Crushing injury of unspecified thigh, initial encounter
Same as the full description in the CMS dataset.
Parent Code
S77.10
Crushing injury of unspecified thigh

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS70-S79Injuries to the hip and thigh
CategoryS77Crushing injury of hip and thigh
This CodeS77.10XACrushing injury of unspecified thigh, initial encounter

Code EditsBilling

Medicare Code Editor checks that affect claim validity for S77.10XA.

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.

  • Closed crush injury, thigh
  • Crushing injury of thigh
  • Open crush injury, thigh

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Crushing injury of hip and thigh (S77). 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 S77.10XA: its own notes plus those printed at S77, block S70-S79, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

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 S77 Crushing injury of hip and thigh applies to 27 codes
  • crushing injury of ankle and foot (S97.-)
  • crushing injury of lower leg (S87.-)
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 S77 Crushing injury of hip and thigh applies to 27 codes
  • code(s) for all associated injuries
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.-)

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 S77 Crushing injury of hip and thigh applies to 27 codes
  • The appropriate 7th character is to be added to each code from category S77
Values for category S77 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter this code
  • Dsubsequent encounter
  • 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 INJ018
Crushing injury, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Wounds and Injuries

An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening.

Read the full article at MedlinePlus

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

Convert S77.10XA to ICD-9-CMHistory

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

ICD-9-CM
928.00 Crushing injury thigh
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 S77.10XAOverview

What is the ICD-10 code for crushing injury of unspecified thigh, initial encounter?

The ICD-10-CM code for crushing injury of unspecified thigh, initial encounter is S77.10XA (sometimes written as S7710XA). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is S77.10XA (Crushing injury of unspecified thigh) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report crushing injury of unspecified thigh, initial encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character A in S77.10XA mean?

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

What MS-DRG does S77.10XA group to?

When crushing injury of unspecified thigh, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 964, 965, 914, 913, 963, with relative weights from 0.9281 to 2.6361 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S77.10XA a CC or MCC?

CMS lists S77.10XA as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 6 closely related codes in its exclusion list.