ICD-10-CM 2027 diagnosis code
S32.413BDisplaced fracture of anterior wall of unspecified acetabulum, initial encounter for open fracture
S32.413B is a valid, billable ICD-10-CM code for displaced fracture of anterior wall of unspecified acetabulum, initial encounter for open fracture. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Disp fx of anterior wall of unsp acetabulum, init for opn fx
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About S32.413B
S32.413B is the ICD-10-CM diagnosis code for displaced fracture of anterior wall of unspecified acetabulum, initial encounter for open fracture. It belongs to category S32 (fracture of lumbar spine and pelvis), block S30-S39 (injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
The 7th character "B" means initial encounter for open fracture: use it while the patient is receiving active treatment for the condition.
Code first: any associated spinal cord and spinal nerve injury (S34.-).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 521 (Hip Replacement with Principal Diagnosis of Hip Fracture with MCC, relative weight 2.8515), DRG 522 (Hip Replacement with Principal Diagnosis of Hip Fracture without MCC, relative weight 2.1158), DRG 535 (Fractures of Hip and Pelvis with MCC, relative weight 1.2728), DRG 536 (Fractures of Hip and Pelvis without MCC, relative weight 0.807), DRG 963 (Other Multiple Significant Trauma with MCC, relative weight 2.6363), DRG 964 (Other Multiple Significant Trauma with CC, relative weight 1.4972) and 1 more, in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue) and MDC 24 (Multiple Significant Trauma), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It is an unspecified code for which a more specific option (often laterality) exists, and the Medicare Code Editor flags it for review on inpatient claims.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 808.1 (open fracture of acetabulum).
7th character
Binitial encounter for open fracture
CC/MCC status for this injury by encounter: MCC for A, B; Neither CC nor MCC for D, G, S; CC for K.
Other encounter types for S32.413:
Notes that apply from higher levels
Instructions written at a parent level also apply to S32.413B.
› From S32.4 Fracture of acetabulum
- any associated fracture of pelvic ring (S32.8-)
› From S32 Fracture of lumbar spine and pelvis
- A fracture not indicated as displaced or nondisplaced should be coded to displaced
- A fracture not indicated as opened or closed should be coded to closed
- fracture of lumbosacral neural arch
- fracture of lumbosacral spinous process
- fracture of lumbosacral transverse process
- fracture of lumbosacral vertebra
- fracture of lumbosacral vertebral arch
- transection of abdomen (S38.3)
- fracture of hip NOS (S72.0-)
- any associated spinal cord and spinal nerve injury (S34.-)
Broader instructions also apply from S30-S39 Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals and Chapter 19: Injury, poisoning and certain other consequences of external causes.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue
MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue
ICD-9-CM equivalent
Converter →- 808.1Open fracture of acetabulumapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about S32.413B
Is S32.413B billable?
- Yes. S32.413B is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
What does the "B" at the end of S32.413B mean?
- It is the 7th character for initial encounter for open fracture. Per the official guidelines, use it while the patient is receiving active treatment for the condition.
Can S32.413B be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict S32.413B as a principal diagnosis.
Is S32.413B a CC or MCC?
- S32.413B is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does S32.413B group to?
- S32.413B is used in the MS-DRG v44.0 logic for MS-DRG 521 (Hip Replacement with Principal Diagnosis of Hip Fracture with MCC), MS-DRG 522 (Hip Replacement with Principal Diagnosis of Hip Fracture without MCC), MS-DRG 535 (Fractures of Hip and Pelvis with MCC), MS-DRG 536 (Fractures of Hip and Pelvis without MCC), MS-DRG 963 (Other Multiple Significant Trauma with MCC), MS-DRG 964 (Other Multiple Significant Trauma with CC) and 1 more. Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for S32.413B?
- The CMS General Equivalence Mappings map S32.413B to ICD-9-CM 808.1.