ICD code S35.218A – Other celiac artery injury

Key takeaways

ICD-10 code S35.218A covers other injury of the celiac artery, initial encounter, under subcategory S35.21 (injury of celiac artery).

Use it only when the record names an injury type other than a laceration, such as a traumatic aneurysm of the celiac artery.

Lacerations code to S35.211A or S35.212A, and injuries to the hepatic, splenic or gastric arteries code to the S35.29- branch codes.

The 7th character A applies while the injury is in active treatment; routine healing-phase visits take S35.218D, and late effects take S35.218S.

Code also any associated open wound (S31.-), and add Chapter 20 external cause codes where your state or payer requires them.

ICD-10 code S35.218A covers celiac trunk injuries that aren’t lacerations

ICD-10 code S35.218A is the billable ICD-10-CM code for other injury of celiac artery, initial encounter. It applies when the record names the celiac artery and documents a specific injury type that is not a laceration. A traumatic aneurysm is the classic example.

The code is easy to define and easy to misuse. It shares a parent with three siblings, and four branch arteries sit right next to it in the tabular list. A wrong pick rarely trips a claim scrubber, because every sibling is a valid code. It tends to surface later, in an audit or a records request.

The code is valid in the FY2027 ICD-10-CM code set, effective October 1, 2026, and the CDC/NCHS ICD-10-CM browser tool lists it as billable. Its parent code, S35.218, is not billable on its own because category S35 requires a 7th character.

The official long descriptor is Other injury of celiac artery, initial encounter. Here, “other” means a specified injury type with no code of its own. It does not mean the provider failed to describe the injury.

S35.218A at a glance: Billable, specific and valid for FY2027

S35.218A sits under the celiac trunk, not its branches

S35.218A sits four levels below category S35, inside the subcategory reserved for the celiac trunk itself. The parent chain runs from broad to specific:

The split that matters most sits at S35.2. The celiac trunk has its own subcategory, S35.21, while its named branches do not. Injuries of the gastric, gastroduodenal, hepatic and splenic arteries all go to S35.29, injury of branches of celiac and mesenteric artery.

The S35.218A 7th character tracks the phase of care, not the visit count

Every code in category S35 needs a 7th character, and it describes where the patient is in treatment. The three options for S35.218 are:

“Initial encounter” does not mean the first visit. Under the ICD-10-CM Official Guidelines, A applies to every encounter where the patient is receiving active treatment for the injury.

Coder decision rule: The move from A to D follows the documentation, not the calendar. A patient who returns to the operating room for the same injury stays on A. A post-discharge visit to check healing takes D.

Four injury types decide which celiac artery code applies

The celiac artery, also called the celiac trunk, is the first major anterior branch of the abdominal aorta. It divides into the left gastric, common hepatic and splenic arteries, which supply the stomach, liver, spleen, pancreas and upper duodenum.

Injury to the celiac trunk is rare and usually follows penetrating abdominal trauma, although blunt and iatrogenic injuries also occur. The ICD-10-CM index sorts each documented injury type to one of the four S35.21 codes:

• S35.211: Minor laceration, including incomplete transection, superficial laceration and laceration NOS.
• S35.212: Major laceration, including complete transection and traumatic rupture of the celiac artery.
• S35.218: Any other specified injury type, such as a traumatic aneurysm or traumatic arteriovenous fistula of the celiac artery.
• S35.219: Celiac artery injury with no injury type documented.

Penetrating trauma that reaches the celiac trunk often injures nearby organs as well. Each organ takes its own code, such as S36.201A for an unspecified injury of the body of the pancreas.

S35.218A inherits its tabular notes from the levels above it

S35.218 carries no notes of its own, so every instruction that applies to it comes from the category, section or chapter above it.

External cause codes in practice: The guidelines set no national requirement to report Chapter 20 codes. They are required only under a state reporting mandate or by a particular payer. Where you report them, place (Y92), activity (Y93) and status (Y99) codes go on the initial encounter only.

Vessel first, injury type second: S35.218A vs related codes

Two questions decide the code: which vessel was injured, and what type of injury the record describes. The decision map below walks through both, then adds the phase of care.

The table compares S35.218A with the codes most often confused with it.

Two vessels, two codes. When the operative note describes injuries to both the celiac trunk and the superior mesenteric artery, report a code for each vessel.

A worked example: Coding a traumatic celiac aneurysm

Here is how those rules play out on one patient. A man arrives after a stab wound to the upper abdomen. CT angiography shows a traumatic aneurysm of the celiac trunk, and the surgeon repairs it the same day.

1. Vessel: The note names the celiac trunk, so the code sits in S35.21-, not in the S35.29- branch codes.
2. Injury type: A traumatic aneurysm is a specified injury that is not a laceration, so the code is S35.218.
3. Phase: The patient is in active treatment, so the 7th character is A, which gives S35.218A.
4. Code also: The stab wound gets its own S31.- open wound code, as the S35 note requires.
5. External cause: Chapter 20 codes for the mechanism and place go on only if your state or payer requires them.

Two weeks later, he returns for a routine wound and imaging check. That visit takes S35.218D. Had he gone back to the operating room for the aneurysm instead, the encounter would stay on S35.218A.

Three documentation elements support S35.218A

That example worked because the note was specific. Three elements in the operative or clinical record support S35.218A over a less specific code. Without them, the defensible choice is usually S35.219A.

1. Named vessel: The record names the celiac artery, celiac trunk or celiac axis. “Mesenteric vessel injury” or “abdominal vascular injury” does not support a celiac artery code.
2. Injury type: The record states an injury other than a laceration, such as a traumatic aneurysm or arteriovenous fistula. A note reading “celiac artery injury” alone supports only S35.219A.
3. Treatment phase: The note shows active treatment, such as a procedure note, ICU management or angiography for the acute injury. Routine healing-phase visits take S35.218D.

Do not infer the injury type from the repair. Intra-abdominal vascular repairs such as CPT 35221 (direct repair) or 35251 (repair with vein graft) fit both lacerations and other injuries. If the surgeon’s description is unclear, query the provider before choosing between S35.218A and S35.219A.

How an S35.218A claim moves from chart to payment

A trauma claim passes through several hands before it is paid, and each handoff can drop a detail. The usual path looks like this:

1. Abstraction: The coder reads the operative note, imaging report and discharge summary for vessel, injury type and phase.
2. Code assignment: S35.218A goes on the claim with its S31.- open wound code and any required external cause codes.
3. Claim build: Each diagnosis is linked to the procedure lines it supports, such as the vascular repair.
4. Scrubbing: Claim edits confirm that each code is valid for the date of service and carries its 7th character.
5. Adjudication: The payer prices the claim and sends a remittance, and any denial comes back with a reason code.

Scrubbing catches format errors, not clinical ones. An S35.219A on a well-documented aneurysm passes every edit, so the specificity check has to happen before the claim leaves.

Before you submit: A five-point check

• The record names the celiac trunk, not the hepatic, splenic or gastric artery.
• The injury type is documented and is not a laceration, rupture or transection.
• The 7th character matches the treatment phase in the note, not the visit number.
• A penetrating injury has its S31.- open wound code on the claim.
• External cause codes are present wherever your state or payer requires them.

Five coding mistakes that get S35.218A claims denied

Most problems with this code come from choosing the wrong sibling rather than from the code itself. Effective denial management workflows for trauma billing watch for these patterns:

• Wrong 7th character: Reporting S35.218A on a routine follow-up visit that should carry S35.218D.
• Branch coded as trunk: Reporting S35.218A for a hepatic, splenic or gastric artery injury that belongs under S35.29-.
• Rupture coded as “other”: The index sends traumatic rupture of the celiac artery to S35.212, major laceration, not to S35.218.
• Missing open wound code: Leaving off the S31.- code that the S35 “code also” note calls for in a penetrating injury.
• Outdated code set: Submitting a code that is not valid for the date of service. Confirm validity in the CDC/NCHS ICD-10-CM browser tool.

If a claim does come back denied, our guide to denial codes in medical billing explains each reason code and how to respond.

The ICD-9-CM crosswalk for S35.218A can’t recover the injury type

Legacy data and research datasets sometimes need the ICD-9-CM equivalent. The CMS General Equivalence Mappings (GEMs), last published in 2018, give an approximate match only.

Because four celiac artery codes collapse into 902.24, an ICD-9 crosswalk loses the injury type entirely. Mapping backward does not restore it.

902.24 maps back to four celiac artery codes, with S35.219A as the preferred target and S35.211A, S35.212A and S35.218A as alternatives. So the backward map cannot recover the original injury type, and you should never use it to pick S35.218A.

How Pabau keeps S35.218A claims clean before submission

Trauma claims are often assembled by hand from operative notes, after a long admission. That is where the 7th character slips, or the open wound code never reaches the claim.

Pabau, the practice management and billing platform we build, pre-fills the claim form from the patient record. ICD-10-CM codes come from the recorded problem list, and a searchable ICD-10-CM and CPT library sits beside each field. The claim cannot be sent until required fields such as membership numbers and authorization codes are complete.

US practices submit through Pabau’s Claim.MD integration, with eligibility checks, claim-status tracking and ERA posting. Your coder still chooses between S35.218A and its siblings, but claims management software removes the retyping behind avoidable rejections.

Submit cleaner abdominal trauma claims with Pabau

Pabau pre-fills each claim from the patient record, checks required fields before sending, and submits US claims through Claim.MD. See how it fits your trauma billing workflow.

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Conclusion

S35.218A rewards patience. Reach for it only after the note confirms the celiac trunk and a specified injury that is not a laceration, rupture or transection.

When either point is unclear, a provider query takes a few minutes. Reworking a denied trauma claim takes far longer, and by then the surgeon may no longer remember the case.

Make that query a standard step and S35.218A stops being a judgment call. Book a demo to see how Pabau carries the diagnosis from the patient record onto a complete trauma claim.

Continue your research

Need to understand how denial codes work after a claim is rejected? Denial codes in medical billing explains CARC and RARC denial reason codes and how to respond to each.

Looking for guidance on electronic claim submission and ERA processing? Electronic remittance advice covers 835 ERA file structure, payment reconciliation, and how automated remittance reduces posting errors.

Want to understand the full revenue cycle context for trauma billing? Revenue cycle management walks through the end-to-end process from eligibility verification to payment posting.

Coding another abdominal vessel injury? ICD-10 code S35.311D covers laceration of the portal vein at a subsequent encounter.

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