Version 2024

2024 ICD-10-CM Diagnosis Code S31.000A

Unspecified open wound of lower back and pelvis without penetration into retroperitoneum, initial encounter

ICD-10-CM Code:: S31.000A
ICD-10 Code for:: Unsp opn wnd low back and pelv w/o penet retroperiton, init
Is Billable?: Yes - Valid for Submission
Chronic Condition Indicator: ^[1]: Not chronic
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Code Information
Approximate Synonyms
Clinical Classification
Coding Guidelines
Tabular List of Diseases and Injuries
Diagnostic Related Groups Mapping
Convert to ICD-9 Code
Patient Education
Other Codes Used Similar Conditions
Code History

Code Classification

Injury, poisoning and certain other consequences of external causes
(S00–T88)
- Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
  (S30-S39)
  - Open wound of abdomen, lower back, pelvis and external genitals
    (S31)

S31.000A is a billable diagnosis code used to specify a medical diagnosis of unspecified open wound of lower back and pelvis without penetration into retroperitoneum, initial encounter. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

S31.000A is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like unspecified open wound of lower back and pelvis without penetration into retroperitoneum. According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.

Unspecified diagnosis codes like S31.000A are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Burst fracture of lumbar vertebra
Central cord syndrome of lumbar spinal cord
Complete disruption of pelvic ring
Complete disruption of pelvic ring
Dislocation of symphysis pubis
Fracture dislocation of sacroiliac joint
Fracture of coccyx
Fracture of fifth lumbar vertebra
Fracture of first lumbar vertebra
Fracture of fourth lumbar vertebra
Fracture of lumbar spine with cord lesion
Fracture of lumbar spine with cord lesion
Fracture of lumbar spine with cord lesion
Fracture of lumbar spine with cord lesion
Fracture of lumbar spine with cord lesion
Fracture of multiple pubic rami
Fracture of multiple pubic rami
Fracture of second lumbar vertebra
Fracture of spinous process of lumbar vertebra
Fracture of superior pubic ramus
Fracture of third lumbar vertebra
Fracture of transverse process of lumbar vertebra
Fractures involving thorax with lower back and pelvis
Fractures involving thorax with lower back and pelvis with limb
Injury of lumbosacral plexus
Multiple open anterior-posterior compression fractures of pelvis with stable pelvic ring
Multiple open anterior-posterior compression fractures of pelvis with unstable pelvic ring
Multiple open fractures of pelvis with disruption of pelvic circle
Multiple open fractures of pelvis with disruption of pelvic circle
Multiple open fractures of pelvis with disruption of pelvic circle
Multiple open lateral compression fractures of pelvis with stable pelvic ring
Multiple open lateral compression fractures of pelvis with unstable pelvic ring
Multiple open vertical shear fractures of pelvis with unstable pelvic ring
Multiple open wounds of abdomen, lower back and pelvis
Multiple open wounds of lower back
Multiple open wounds of pelvic region
Open avulsion fracture of anterior inferior spine of ilium
Open complete rupture of pelvic ring
Open complete rupture of sacroiliac joint
Open complete rupture pubic symphysis
Open compression fracture sacrum
Open dislocation of coccyx
Open dislocation of lumbar vertebra
Open dislocation of lumbar vertebra
Open dislocation of lumbar vertebra
Open dislocation of lumbar vertebra
Open dislocation of lumbar vertebra
Open dislocation of lumbar vertebra
Open dislocation of lumbosacral joint
Open dislocation of sacroiliac joint
Open dislocation of sacroiliac joint
Open dislocation of sacroiliac joint
Open dislocation of sacrum
Open division anterior sacroiliac ligament
Open division iliolumbar ligament
Open division of pubic ligament
Open division pelvic ligament
Open division posterior sacroiliac ligament
Open division sacroiliac ligament
Open division sacrospinous ligament
Open division sacrotuberous ligament
Open division symphysis pubis
Open division, lumbar ligament
Open division, sacrum ligament
Open fracture dislocation of pelvis
Open fracture dislocation of sacroiliac joint
Open fracture involving thorax with lower back and pelvis and limbs
Open fracture lumbar vertebra
Open fracture lumbar vertebra, burst
Open fracture lumbar vertebra, posterior arch
Open fracture lumbar vertebra, posterior arch
Open fracture lumbar vertebra, spinous process
Open fracture lumbar vertebra, spondylolysis
Open fracture lumbar vertebra, transverse process
Open fracture lumbar vertebra, tricolumnar
Open fracture of anterior column of left acetabulum
Open fracture of anterior column of right acetabulum
Open fracture of coccyx
Open fracture of fifth lumbar vertebra
Open fracture of first lumbar vertebra
Open fracture of fourth lumbar vertebra
Open fracture of ilium
Open fracture of innominate bone
Open fracture of left acetabulum
Open fracture of left acetabulum
Open fracture of left pubis
Open fracture of lumbar spine with incomplete lesion of lumbar spinal cord
Open fracture of lumbar vertebra with spinal cord injury
Open fracture of lumbar vertebra with spinal cord injury
Open fracture of lumbar vertebra with spinal cord injury
Open fracture of lumbar vertebra with spinal cord injury
Open fracture of lumbar vertebra with spinal cord injury
Open fracture of pubis
Open fracture of pubis
Open fracture of pubis
Open fracture of pubis
Open fracture of right acetabulum
Open fracture of right acetabulum
Open fracture of right pubis
Open fracture of sacrum AND/OR coccyx with cauda equina injury
Open fracture of sacrum AND/OR coccyx with complete cauda equina lesion
Open fracture of sacrum with complete cauda equina lesion
Open fracture of second lumbar vertebra
Open fracture of third lumbar vertebra
Open fracture pelvis, single pubic ramus
Open fracture sacrum
Open fracture sacrum
Open fracture sacrum
Open fracture subluxation of pelvis
Open injury cauda equina
Open injury pudendal nerve
Open injury sacral plexus
Open Malgaigne fracture
Open spinal dislocation with anterior lumbar cord lesion
Open spinal dislocation with cauda equina lesion
Open spinal dislocation with cauda equina lesion
Open spinal dislocation with central lumbar cord lesion
Open spinal dislocation with complete lumbar cord lesion
Open spinal dislocation with posterior lumbar cord lesion
Open spinal fracture with anterior lumbar cord lesion
Open spinal fracture with cauda equina lesion
Open spinal fracture with cauda equina lesion
Open spinal fracture with cauda equina lesion
Open spinal fracture with cauda equina lesion
Open spinal fracture with central lumbar cord lesion
Open spinal fracture with complete lumbar cord lesion
Open spinal fracture with posterior lumbar cord lesion
Open spinal subluxation with anterior lumbar cord lesion
Open spinal subluxation with cauda equina lesion
Open spinal subluxation with central lumbar cord lesion
Open spinal subluxation with complete lumbar cord lesion
Open spinal subluxation with posterior lumbar cord lesion
Open stable fracture of multiple pubic rami
Open subluxation lumbar spine
Open subluxation lumbar spine
Open subluxation lumbar spine
Open subluxation lumbar spine
Open subluxation lumbar spine
Open subluxation of coccyx
Open subluxation of sacrum
Open traumatic dislocation of pelvis
Open traumatic subluxation of pelvis
Open traumatic subluxation of pelvis
Open traumatic subluxation of pelvis
Open traumatic subluxation of pelvis
Open unstable fracture of multiple pubic rami
Open vertical fracture of ilium
Open wound of anterior abdominal wall without complication
Open wound of back with complication
Open wound of back with complication
Open wound of back, uncomplicated
Open wound of back, uncomplicated
Open wound of hypogastric region
Open wound of lower back
Open wound of lumbar region
Open wound of lumbar region with complication
Open wound of lumbar region without complication
Open wound of pelvic region
Open wound of pelvic region with complication
Open wound of pelvic region without complication
Open wound of pubic region without complication
Open wound of sacroiliac region
Open wound of sacroiliac region
Open wound of sacroiliac region with complication
Open wound of sacroiliac region without complication
Open wounds involving thorax with abdomen, lower back and pelvis
Posterior cord syndrome of lumbar spinal cord
Pudendal nerve injury
Pudendal nerve neuropathy
Spinal subluxation with cauda equina lesion
Spinal subluxation with lumbar cord lesion
Spinal subluxation with lumbar cord lesion
Spinal subluxation with lumbar cord lesion
Spinal subluxation with lumbar cord lesion
Subluxation of coccyx
Subluxation of sacrum
Subluxation of sacrum
Three column fracture of lumbar vertebra
Traumatic amputation of lower back
Traumatic amputation of pelvis
Traumatic dislocation of lumbosacral joint
Traumatic dislocation of sacrococcygeal joint
Traumatic dislocation of sacrococcygeal joint
Traumatic dislocation of sacroiliac joint
Traumatic dislocation of sacroiliac joint
Traumatic dislocation of sacroiliac joint
Traumatic rupture of symphysis pubis
Vertical fracture of ilium

Clinical Classification

Clinical Category is Open wounds of trunk, initial encounter
CCSR Category Code: INJ013
Inpatient Default CCSR: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.
Outpatient Default CCSR: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Coding Guidelines

The appropriate 7th character is to be added to each code from block Open wound of abdomen, lower back, pelvis and external genitals (S31). Use the following options for the aplicable episode of care:

A - initial encounter
D - subsequent encounter
S - sequela

S31.000A is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

MS-DRG	MS-DRG Title	MCD	Relative Weight
604	TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITH MCC	09	1.5062
605	TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITHOUT MCC	09	0.9088

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Convert S31.000A to ICD-9-CM

ICD-9-CM Code: 876.0 - Open wound of back
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.
ICD-9-CM Code: 879.6 - Open wound of trunk NEC
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education

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. Injuries can happen at work or play, indoors or outdoors, driving a car, or walking across the street.

Wounds are injuries that break the skin or other body tissues. They include cuts, scrapes, scratches, and punctured skin. They often happen because of an accident, but surgery, sutures, and stitches also cause wounds. Minor wounds usually aren't serious, but it is important to clean them. Serious and infected wounds may require first aid followed by a visit to your doctor. You should also seek attention if the wound is deep, you cannot close it yourself, you cannot stop the bleeding or get the dirt out, or it does not heal.

Other common types of injuries include:

Animal bites
Bruises
Burns
Dislocations
Electrical injuries
Fractures (broken bones)
Sprains and strains

[Learn More in MedlinePlus]

Other ICD-10-CM Codes Commonly Used for Similar Conditions

Filter related codes list:

S31 Open wound of abdomen, lower back, pelvis and external genitals.
S31.0 Open wound of lower back and pelvis.
S31.00 Unspecified open wound of lower back and pelvis.
S31.000 Unspecified open wound of lower back and pelvis without penetration into retroperitoneum.
S31.000D Unspecified open wound of lower back and pelvis without penetration into retroperitoneum, subsequent encounter.
S31.000S Unspecified open wound of lower back and pelvis without penetration into retroperitoneum, sequela.
S31.001 Unspecified open wound of lower back and pelvis with penetration into retroperitoneum.
S31.001A Unspecified open wound of lower back and pelvis with penetration into retroperitoneum, initial encounter.
S31.001D Unspecified open wound of lower back and pelvis with penetration into retroperitoneum, subsequent encounter.
S31.001S Unspecified open wound of lower back and pelvis with penetration into retroperitoneum, sequela.
S31.01 Laceration without foreign body of lower back and pelvis.
S31.010 Laceration without foreign body of lower back and pelvis without penetration into retroperitoneum.
S31.010A Laceration without foreign body of lower back and pelvis without penetration into retroperitoneum, initial encounter.
S31.010D Laceration without foreign body of lower back and pelvis without penetration into retroperitoneum, subsequent encounter.
S31.010S Laceration without foreign body of lower back and pelvis without penetration into retroperitoneum, sequela.
S31.011 Laceration without foreign body of lower back and pelvis with penetration into retroperitoneum.
S31.011A Laceration without foreign body of lower back and pelvis with penetration into retroperitoneum, initial encounter.
S31.011D Laceration without foreign body of lower back and pelvis with penetration into retroperitoneum, subsequent encounter.
S31.011S Laceration without foreign body of lower back and pelvis with penetration into retroperitoneum, sequela.
S31.02 Laceration with foreign body of lower back and pelvis.
S31.020 Laceration with foreign body of lower back and pelvis without penetration into retroperitoneum.
S31.020A Laceration with foreign body of lower back and pelvis without penetration into retroperitoneum, initial encounter.
S31.020D Laceration with foreign body of lower back and pelvis without penetration into retroperitoneum, subsequent encounter.
S31.020S Laceration with foreign body of lower back and pelvis without penetration into retroperitoneum, sequela.
S31.021 Laceration with foreign body of lower back and pelvis with penetration into retroperitoneum.
S31.021A Laceration with foreign body of lower back and pelvis with penetration into retroperitoneum, initial encounter.
S31.021D Laceration with foreign body of lower back and pelvis with penetration into retroperitoneum, subsequent encounter.
S31.021S Laceration with foreign body of lower back and pelvis with penetration into retroperitoneum, sequela.
S31.03 Puncture wound without foreign body of lower back and pelvis.
S31.030 Puncture wound without foreign body of lower back and pelvis without penetration into retroperitoneum.
S31.030A Puncture wound without foreign body of lower back and pelvis without penetration into retroperitoneum, initial encounter.
S31.030D Puncture wound without foreign body of lower back and pelvis without penetration into retroperitoneum, subsequent encounter.
S31.030S Puncture wound without foreign body of lower back and pelvis without penetration into retroperitoneum, sequela.
S31.031 Puncture wound without foreign body of lower back and pelvis with penetration into retroperitoneum.
S31.031A Puncture wound without foreign body of lower back and pelvis with penetration into retroperitoneum, initial encounter.
S31.031D Puncture wound without foreign body of lower back and pelvis with penetration into retroperitoneum, subsequent encounter.
S31.031S Puncture wound without foreign body of lower back and pelvis with penetration into retroperitoneum, sequela.
S31.04 Puncture wound with foreign body of lower back and pelvis.
S31.040 Puncture wound with foreign body of lower back and pelvis without penetration into retroperitoneum.
S31.040A Puncture wound with foreign body of lower back and pelvis without penetration into retroperitoneum, initial encounter.
S31.040D Puncture wound with foreign body of lower back and pelvis without penetration into retroperitoneum, subsequent encounter.
S31.040S Puncture wound with foreign body of lower back and pelvis without penetration into retroperitoneum, sequela.
S31.041 Puncture wound with foreign body of lower back and pelvis with penetration into retroperitoneum.
S31.041A Puncture wound with foreign body of lower back and pelvis with penetration into retroperitoneum, initial encounter.
S31.041D Puncture wound with foreign body of lower back and pelvis with penetration into retroperitoneum, subsequent encounter.
S31.041S Puncture wound with foreign body of lower back and pelvis with penetration into retroperitoneum, sequela.
S31.05 Open bite of lower back and pelvis.
S31.050 Open bite of lower back and pelvis without penetration into retroperitoneum.
S31.050A Open bite of lower back and pelvis without penetration into retroperitoneum, initial encounter.
S31.050D Open bite of lower back and pelvis without penetration into retroperitoneum, subsequent encounter.
S31.050S Open bite of lower back and pelvis without penetration into retroperitoneum, sequela.

Code History

FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

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.