2027 ICD-10-CM Diagnosis Code S74.20XAInjury of cutaneous sensory nerve at hip and thigh level, unspecified leg, initial encounter

ICD-10-CM Codes›S00–T88›S70-S79›S74

ICD-10-CM S74.20XA
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S74.20XA is a billable ICD-10-CM diagnosis code for injury of cutaneous sensory nerve at hip and thigh level, unspecified leg, 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 73 through 74, 963 through 965. Coders also document this condition as closed injury lateral cutaneous nerve thigh. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury to nerves, muscles and tendons, initial encounter.

Code Identity

ICD-10-CM Code
S74.20XA
Billable Status
Yes — Valid for Submission
Code Describes
Injury of cutaneous sensory nerve at hip and thigh level, unspecified leg, initial encounter
Short Description
Inj cutan sensory nerve at hip and thi lev, unsp leg, init
Parent Code
S74.20
Injury of cutaneous sensory nerve at hip and thigh level, unspecified leg

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS70-S79Injuries to the hip and thigh
CategoryS74Injury of nerves at hip and thigh level
This CodeS74.20XAInjury of cutaneous sensory nerve at hip and thigh level, unspecified leg, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Closed injury lateral cutaneous nerve thigh
  • Injury of lateral cutaneous nerve of thigh
  • Lateral cutaneous nerve of thigh lesion
  • Open injury lateral cutaneous nerve thigh

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Injury of nerves at hip and thigh level (S74). 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 S74.20XA: its own notes plus those printed at S74, 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 S74 Injury of nerves at hip and thigh level applies to 45 codes
  • injury of nerves at ankle and foot level (S94.-)
  • injury of nerves at lower leg level (S84.-)
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 S74 Injury of nerves at hip and thigh level applies to 45 codes
  • any associated open wound (S71.-)

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 S74 Injury of nerves at hip and thigh level applies to 45 codes
  • The appropriate 7th character is to be added to each code from category S74
Values for category S74 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 INJ025
Injury to nerves, muscles and tendons, 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 S74.20XA to ICD-9-CMHistory

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

ICD-9-CM
956.4 Inj cutan senso nerv/leg
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 S74.20XAOverview

Is S74.20XA a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report injury of cutaneous sensory nerve at hip and thigh level, unspecified leg, initial encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character A in S74.20XA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for injury of cutaneous sensory nerve at hip and thigh level, unspecified leg, such as an emergency visit or first evaluation.

What MS-DRG does S74.20XA group to?

When injury of cutaneous sensory nerve at hip and thigh level, unspecified leg, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 964, 965, 74, 73, 963, with relative weights from 1.0054 to 2.6361 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S74.20XA?

Under the General Equivalence Mappings, injury of cutaneous sensory nerve at hip and thigh level, unspecified leg, initial encounter converts to ICD-9-CM 956.4 (inj cutan senso nerv/leg). The mapping is approximate, so confirm the match fits the documentation.