ICD-10 Code S40.019A: Contusion of Unspecified Shoulder
ICD-10 code S40.019A is the billable diagnosis code for a contusion of unspecifi...
Last Updated: July 31, 2026
Key takeaways
S32.311G is a billable ICD-10-CM code for a displaced avulsion fracture of the right ilium with delayed healing
The 7th character G means the follow-up visit found slow union, not routine healing (D) and not failed union (K)
Category S32 allows only six 7th characters: A, B, D, G, K and S. It has no malunion character, so S32.311P does not exist
Laterality and displacement share the 6th character, so S32.311G is right and displaced while S32.314G is right and nondisplaced
Practice management software like Pabau keeps imaging, prior visits and coding on one record, so the 7th character is easy to justify
ICD-10 Code S32.311G reports a displaced avulsion fracture of the right ilium at a follow-up visit with delayed healing. The 7th character G is what carries the delayed part.
It is the code for the twelve-week check where imaging describes thin callus and a fracture line that is still visible. The bone is knitting, only slowly. A coder who reaches for K instead is reporting nonunion, which is a different clinical finding.
This reference covers the code’s official descriptor and its place in the S32 hierarchy. It also sets out the six 7th characters the category allows, and the documentation each one needs.
ICD-10 Code S32.311G: definition and billable status
ICD-10 Code S32.311G is a billable ICD-10-CM diagnosis code. Its full official descriptor is: Displaced avulsion fracture of right ilium, subsequent encounter for fracture with delayed healing. The code is valid for FY2026 and accepted for HIPAA-covered transactions, per the CMS ICD-10 codes page.
Understanding the 7th character G: subsequent encounter with delayed healing
The 7th character in an ICD-10-CM fracture code carries clinical meaning of its own. Choose the wrong one and the claim reports a healing status the record does not support.
In S32.311G, the G means the patient returned after active treatment began and the fracture is healing more slowly than expected. The 7th-character encounter system is unique to ICD-10-CM, and the international WHO ICD-10 has no equivalent. The Tabular List sets out which 7th characters each category in the S30-S39 block allows.
Category S32 allows those six characters and no others. Several limb fracture categories add P for malunion, but the lumbar spine and pelvis category does not. S32.311P is not a valid code, so a record describing a malunited ilium calls for a physician query rather than a borrowed character.
One practical rule governs the G character. The clinician has to state that healing is behind schedule, with imaging showing sparse or incomplete callus past the expected window. If the note confirms the fracture is knitting on time, D stays correct. If the clinician concludes union has failed, the code moves to K.
Clinical description: displaced avulsion fracture of the right ilium
An avulsion fracture occurs when a fragment of bone is pulled away from the main bone mass by an attached tendon or ligament. At the ilium, this usually involves the anterior superior or anterior inferior iliac spine. Those are the attachment points for the sartorius and rectus femoris tendons.
Sudden athletic effort in adolescents and young adults is the typical mechanism. For fracture rehabilitation protocols to be tracked accurately, the coding has to capture displacement, laterality and encounter type from the start.
The displaced qualifier in S32.311G is clinically significant. Displacement means the fragment has moved out of its anatomical position relative to the main ilium, which changes both treatment and code selection. Nondisplaced avulsion fractures of the right ilium code to the S32.314x series, and the left side codes to S32.315x.
ICD-10-CM also supplies two defaults at category level, both set out in the FY2026 official coding guidelines. A fracture the record does not describe as displaced or nondisplaced is coded as displaced. A fracture not described as open or closed is coded as closed.
- Displaced: the fragment has shifted position, which often calls for closer management or surgical fixation
- Nondisplaced: the fragment stays in anatomical alignment and codes to S32.314x on the right
- Laterality and displacement: both sit in the 6th character. 1 is displaced right, 2 is displaced left, 4 is nondisplaced right and 5 is nondisplaced left
- Subsequent encounter: any visit after active treatment has started, including physical therapy follow-ups
- Delayed healing: clinician-documented union that is running behind the expected timeframe, supported by imaging
S32.311G code hierarchy
Knowing where S32.311G sits in the ICD-10-CM hierarchy helps coders navigate adjacent codes and apply sequencing rules when several injuries are present. The full path from chapter to billable code is below.
Three category-level notes travel with every S32 code. The first says to code first any associated spinal cord and spinal nerve injury from S34.-. An Excludes1 note keeps transection of abdomen, S38.3, out of the category. An Excludes2 note sends fracture of hip NOS to S72.0- instead.
Related and adjacent ICD-10 codes
The S32.311 family covers displaced avulsion fractures of the right ilium across every encounter type. Knowing the full sibling set prevents the most common laterality and encounter-type errors. Cross-reference them against the AAPC code lookup or icd10data.com to confirm current-year validity.
When a patient carries injuries across several body systems, sequencing rules put the most severe or principal injury first. S32.311G often appears as a secondary code when another injury or comorbidity drives the encounter, alongside a pelvic code such as S32.432D.
Documentation requirements for S32.311G
Claims for S32.311G are usually questioned over four things. Reviewers look for healing status, laterality, displacement, and proof that active treatment already happened. All four belong in the record before the code goes out. HIPAA-compliant billing workflows depend on the diagnosis matching what the clinician wrote at that visit.
- Delayed healing evidence: imaging (X-ray, CT or MRI) shows sparse or incomplete callus past the expected window. The clinician also states that union is behind schedule
- Laterality: the record must say right ilium. A note reading only “ilium fracture” or “pelvic avulsion” will not support S32.311G
- Subsequent encounter context: active treatment must already have started at an earlier visit. If this is the first encounter for the fracture, A or B applies instead of G
- Displacement carried forward: the 7th-character code should keep the displacement status the initial encounter documented. If the fragment has since moved, ask the clinician to document that before switching series
Build a short documentation checklist that captures all four elements at every fracture follow-up. It matters most in category S32, where an encounter-type error repeats across the whole episode of care. A routine medical chart audit catches those repeats early.
Pro Tip
Before an S32.311G claim goes out, check four things in the chart. Does the imaging report describe callus as sparse or incomplete? Does the clinician call healing slow rather than failed? Is laterality recorded as right? Is there a dated earlier encounter for the same fracture? One missing element is enough for a payer to deny without asking for more.
Coding tips: five common errors with S32.311G
Most errors with S32.311G fall into five predictable categories. Each one is fixed by structured documentation habits and a clear picture of the code family.
Practices that standardize subsequent-encounter coding across their ICD-10-CM workflows catch these before submission rather than after a denial.
Delayed healing versus nonunion. Both describe a fracture that is behind schedule, and both are subsequent encounters. That overlap is why G and K get swapped.
Delayed healing means union is still under way, only slowly. Nonunion means the clinician has concluded the bone will not unite without intervention. A report reading “callus formation sparse but present” supports the G character. One reading “no evidence of bony union” supports K, as it does for the acetabular code S32.402K.
Where S32.311G fits among the pelvic fracture codes
Category S32 covers fractures of the lumbar spine and pelvis, which makes it one of the broader injury categories orthopedic coders navigate. S32.311G sits inside the S32.3x ilium subcategory, one of several pelvic sub-regions coded under S32.
Knowing those boundaries stops coders drifting into an adjacent subcategory when the injury is specific to the ilium.
For physical therapy practice management teams seeing pelvic injuries at follow-up, S32 is the primary coding category. Two adjacent categories sit close by.
S31 covers open wound of the abdomen, lower back, pelvis and external genitals. S33 covers dislocation and sprain of joints and ligaments of the lumbar spine and pelvis. Neither should be confused with an S32 fracture code when several injuries coexist.
- S32.0x: fracture of lumbar vertebra
- S32.1x: fracture of sacrum
- S32.2x: fracture of coccyx
- S32.3x: fracture of ilium, which includes S32.311G
- S32.4x: fracture of acetabulum
- S32.5x: fracture of pubis
- S32.6x: fracture of ischium
When a patient presents with several pelvic fractures at a follow-up visit, each fracture takes its own code and its own 7th character. S32.311G is not a catch-all for pelvic fracture follow-ups.
It applies to the right ilium avulsion fracture with documented delayed healing. An unspecified pelvic fracture seen as an open injury codes to S32.9XXB instead.
For orthopedic and sports medicine practices handling high volumes of musculoskeletal claims, a structured approach to S32 coding lowers audit exposure. Sports medicine practice software that sits alongside billing can flag a fracture code with no matching prior encounter on file. That catches the most common S32 error before the claim leaves the office.
How Pabau keeps fracture follow-ups coded correctly
In most orthopedic and physical therapy practices, the three facts that decide the 7th character live in three different places. The imaging report sits in one system, the earlier visit note in another, and the diagnosis gets typed from memory when the claim is built.
Practice management software like Pabau keeps them on one patient record. Medical records management holds the clinical notes, prior appointments and uploaded imaging in one place. A coder can check the treatment start date and the current healing status without leaving the chart.
Pabau Scribe, our AI scribe, drafts the visit note from the consultation. That captures healing status in the clinician’s own words, which is what the 7th character has to match.
The result is fewer follow-up claims that report routine healing when the record says otherwise. Coders spend less time chasing paperwork after a denial, and the practice keeps one consistent story across the whole fracture episode.
Catch fracture coding errors before the claim goes out
Pabau keeps imaging, prior encounters and clinical notes on one patient record. Your coders confirm healing status, laterality and displacement without leaving the chart.
Conclusion
S32.311G reports one specific situation. The fracture is a displaced avulsion of the right ilium, seen after treatment has started. At that visit it is healing more slowly than expected.
Four documented facts hold the code up, and all four have to be visible when the claim is built. Waiting until a denial arrives means re-reading imaging and prior notes for an encounter that closed weeks ago.
The two costliest errors are also the easiest to prevent. Coding K reports a failed union the record does not support, and reversing laterality sends a right-side injury out as S32.312G. Remember that S32 has no malunion character at all, so P is never the answer here.
Pabau keeps documentation, prior encounters and diagnosis coding on a single record, so those checks happen before the claim is built. To see how it handles fracture episodes and ICD-10 code management, book a demo.
Continue your research
Coding an open pelvic injury? S31.829A covers the open wound codes that sit alongside an S32 fracture in the same region.
Assessing the lumbar spine at follow-up? Passive lumbar extension test walks through the technique and what a positive result tells you.
Screening for knee instability after trauma? Reverse pivot shift test explains how to perform it and how to record the finding.
Auditing your own coding accuracy? Medical chart audit sets out how to sample charts and act on what the review finds.
Choosing software for a small practice? Best EMR for small practice compares the systems that suit lower-volume specialty teams.
Frequently asked questions
What does ICD-10 Code S32.311G mean?
ICD-10 Code S32.311G is a billable ICD-10-CM code for a displaced avulsion fracture of the right ilium. It applies at a follow-up visit where the fracture is healing more slowly than expected. The 7th character G means subsequent encounter for fracture with delayed healing. It is distinct from routine healing (D) and from nonunion (K).
Is S32.311G a billable ICD-10 code?
Yes. S32.311G is a billable, specific ICD-10-CM code valid for FY2026 and accepted for HIPAA-covered transactions. It is a full seven-character code and needs no further extension for billing.
What is the difference between displaced and nondisplaced avulsion fracture of the ilium in ICD-10?
Displaced avulsion fractures of the ilium code to S32.311 on the right, S32.312 on the left and S32.313 when the side is unspecified. Nondisplaced fractures code to S32.314, S32.315 and S32.316 in the same order. If the record does not say which it is, ICD-10-CM defaults to displaced.
What is the 7th character G in ICD-10 fracture codes?
The 7th character G means subsequent encounter for fracture with delayed healing. It applies when the patient returns after active treatment has begun and union is running behind the expected timeframe. It is distinct from D for routine healing, K for nonunion and S for sequela.
What is an avulsion fracture of the ilium?
An avulsion fracture of the ilium happens when a bone fragment is pulled away from the ilium by an attached tendon or ligament. It usually occurs at the anterior superior or anterior inferior iliac spine. Sudden muscular contraction during sport is the common cause, most often in adolescents and young adults.
When should I use S32.311G versus S32.311K?
Use S32.311G when imaging and the clinician’s note describe union as slow but still under way. Use S32.311K when the clinician has concluded the fracture has failed to unite. The distinction has to be documented, because coders cannot infer healing status from the encounter type alone.
Is there a malunion code for S32.311?
No. The six 7th characters in category S32 are A, B, D, G, K and S, and none of them means malunion. S32.311P does not exist. When the record describes a malunited ilium, query the clinician rather than borrowing a character from another category.
