ICD-10 code S98.141A: Partial traumatic amputation of right lesser toe

ICD-10 code S98.141A is the billable diagnosis code for partial traumatic amputation of one right lesser toe, initial encounter. That is the whole of what the code says. It names the toe group, the laterality, whether the amputation was partial or complete, and the treatment phase.

It records nothing about the joint the digit was severed at, even though widely copied descriptions of this code claim it does. Joint level belongs to the CPT code and the operative note instead.

Key takeaways

S98.141A is a billable ICD-10-CM code for partial traumatic amputation of one right lesser toe, initial encounter

The code encodes three axes only: great toe versus one lesser toe, partial versus complete, and right versus left

No S98 code names a joint level, so the ICD-10-CM code never distinguishes a PIP amputation from an MTP amputation

Joint level is a CPT-side distinction: 28825 for the interphalangeal joint, 28820 for the metatarsophalangeal joint, 28810 with the metatarsal

Three 7th character variants exist: A (initial encounter), D (subsequent encounter), and S (sequela) – selecting the wrong one is a common audit trigger

The code groups to MS-DRG 913 or 914 under MDC 21, the injuries and poisonings MDC, not a musculoskeletal one

Pabau’s claims management software supports accurate ICD-10 code entry and claim submission through its Claim.MD clearinghouse integration

ICD-10 code S98.141A: Quick reference

S98.141A is a valid, billable ICD-10-CM injury code within Chapter 19 (Injury, Poisoning, and Certain Other Consequences of External Causes). The table below summarizes its attributes at a glance, as published in the CDC/NCHS ICD-10-CM web tool.

What S98.141A actually specifies

The S98.141A description carries exactly four pieces of information: the toe group, the laterality, the severity, and the encounter type. Get any one of them wrong and the code is non-specific or invalid. Anything beyond those four elements has to come from elsewhere on the claim.

What “lesser toe” means in ICD-10-CM

Lesser toes are the 2nd through 5th toes – every toe except the hallux (great toe). The hallux has its own S98 subcategories. When a provider documents injury to the second, third, fourth, or fifth toe on the right foot, that falls under the lesser toe grouping.

• 1st toe (hallux): great toe amputations are coded to S98.11 (complete) or S98.12 (partial)
• 2nd-5th toes (lesser toes): a single lesser toe goes to S98.13 (complete) or S98.14 (partial); two or more go to S98.21 or S98.22
• Right vs. left laterality: the 6th character carries it – 1 for right, 2 for left, 9 for unspecified

Partial versus complete amputation

A partial amputation means the digit was not severed through its full cross-section, so some tissue bridge remains. S98.14 covers that presentation; S98.13 covers a complete amputation of one lesser toe. The distinction is not a coder judgment call.

S98 carries an Applicable To note that settles ambiguous documentation: an amputation not identified as partial or complete is coded to complete. An operative note that says only “traumatic amputation of the right third toe” therefore lands on S98.131A, not S98.141A.

Why the code does not name a joint level

No code in the S98.1 block names a joint. Read the full titles in order and only three axes appear. They are great toe or one lesser toe, complete or partial, and right or left. The 7th character then adds the encounter type.

That is a deliberate design choice rather than an oversight. ICD-10-CM spells out joint level freely in other blocks, so it clearly can when it wants to. S63.238, for instance, is titled “Subluxation of proximal interphalangeal joint of other finger”.

The practical consequence matters at the point of coding. A provider note that documents amputation at the proximal interphalangeal joint does not unlock a more specific ICD-10-CM code, because none exists. That detail drives the CPT selection instead, and it belongs in the operative report.

Billable status and code validity

S98.141A is a billable and specific ICD-10-CM code, confirmed valid for use on HIPAA-covered electronic health claims. The CMS ICD-10-CM code files confirm its FY2026 effective date as October 1, 2025, with validity through September 30, 2026. Submitting this code on a claim does not require additional specificity – it is already the most granular code available for this diagnosis. Understanding the broader medical billing workflow helps practices apply codes like S98.141A correctly at every step of the revenue cycle.

7th character options for ICD-10 code S98.141A

Under ICD-10-CM Official Guidelines Section I.C.19.a, all traumatic injury codes in Chapter 19 require a 7th character to indicate the encounter type. Selecting the wrong character is one of the most common audit triggers for S98 codes. The parent stem S98.141 has three valid options.

A key clarification: “initial encounter” does not mean the first calendar visit. It refers to the phase of treatment. A patient can visit the same provider three times during active surgical management. All three visits use 7th character A. Switching to D happens when active treatment concludes and ongoing monitoring begins. The ICD-10-CM encounter type framework applies the same A/D/S logic across all Chapter 19 injury codes.

Code hierarchy and parent codes (S98 ICD-10)

Knowing where S98.141A sits in the broader ICD-10-CM diagnosis coding hierarchy helps coders navigate to the correct code. It also prevents picking a non-billable parent code by mistake.

• Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
• S90-S99: Injuries to the ankle and foot
• S98: Traumatic amputation of ankle and foot
• S98.1: Traumatic amputation of one toe (parent to both the great toe and lesser toe branches)
• S98.14: Partial traumatic amputation of one lesser toe
• S98.141: Partial traumatic amputation of one right lesser toe (non-billable parent – requires 7th character)
• S98.141A: Initial encounter (billable)

Only S98.141A, S98.141D, and S98.141S are billable. Submitting S98.141 without a 7th character will be rejected as an invalid code by most payers and clearinghouses.

Related and sibling codes

Several codes within the S98 family are commonly confused with S98.141A. The table below maps the most clinically relevant siblings, covering laterality variants, complete versus partial amputation, toe count, and the great toe distinction. For a broader look at ICD-10-CM injury code hierarchy, similar structural patterns appear across all Chapter 19 injury categories.

Check with the AAPC ICD-10-CM code lookup when confirming the full S98 sibling code set for any payer-specific claim edits.

Excludes notes and applicable annotations for S98.141A

S98 carries no Excludes1 or Excludes2 note of its own. The annotations that reach S98.141A are inherited from the chapter and the block above it, plus one Applicable To note on S98. Misreading an Excludes1 note as an Excludes2 is a common denial code trigger in traumatic injury billing.

The Excludes1 sits on S91, not on S98

Excludes1 means the two codes cannot describe the same episode. The relevant note is printed under S91, open wound of ankle, foot and toes. It excludes traumatic amputation of ankle and foot (S98.-) as a Type 1 exclude.

The effect runs in both directions on a claim. Do not report an S91 open wound code alongside S98.141A for the same injury to the same toe. S91 also carries a Type 1 exclude for open fracture of the ankle, foot, and toes.

Excludes2 notes inherited from the block and chapter

Excludes2 means the excluded condition is not part of this code’s description but may occur at the same time. Both codes are valid when both conditions are documented. The S90-S99 block carries these:

• Burns and corrosions (T20-T32)
• Fracture of ankle and malleolus (S82.-)
• Frostbite (T33-T34)
• Insect bite or sting, venomous (T63.4)

Chapter 19 adds two more Excludes2 entries at the top level: birth trauma (P10-P15) and obstetric trauma (O70-O71). Neither comes up often on an adult toe amputation claim.

Applicable To and additional code requirements

• Partial versus complete default: S98 states that an amputation not identified as partial or complete is coded to complete. Silent documentation moves the claim to S98.131A.
• External cause: Chapter 19 instructs coders to use secondary codes from Chapter 20 (V00-Y99) to record the cause of the injury.
• Retained foreign body: the chapter carries a Use Additional Code note for Z18.- when debris remains in the wound.

When in doubt about Excludes note interpretation, the AHA Coding Clinic is the official source for authoritative guidance on ICD-10-CM coding questions.

Associated CPT procedure codes for toe amputation

ICD-10 code S98.141A is a diagnosis code – it describes what the patient has. The CPT code describes what the provider did, and it is the side of the claim that carries the joint level. For context on how CPT procedure code references pair with diagnosis codes, the selection logic is always documentation-driven.

All three CPT codes can legitimately sit alongside S98.141A, because the diagnosis code does not constrain the surgical level. Read the operative report to confirm what the surgeon actually resected, then pick the CPT code that matches it. The claims management software used by your billing team should flag any CPT-ICD pairing that falls outside standard medical necessity edits.

Clinical scenarios for coding S98.141A

These three scenarios follow one injury through the encounter types and show where the diagnosis code stays fixed and where it changes.

Scenario 1: Emergency presentation

A patient drops a steel plate on the right foot in a workshop. The third toe is partially severed but still attached by a soft tissue bridge, which the ED documents explicitly. Code S98.141A, plus external cause codes for the mechanism and place of injury.

Scenario 2: Surgical completion two days later

The tissue is not viable, so the surgeon completes the amputation at the metatarsophalangeal joint. The diagnosis stays S98.141A, because active treatment is still under way and the traumatic injury was partial. The procedure is CPT 28820, which is where the MTP level gets recorded.

This is the pairing that trips coders who expect the ICD-10-CM code to match the surgical level. It does not have to, and no S98 code offers that match.

Scenario 3: Follow-up and late effects

Three weeks on, the patient attends a routine wound check with active treatment complete. That visit uses S98.141D. If altered gait or scar pain persists after healing, code the residual condition first and S98.141S second.

DRG grouping for S98.141A

S98.141A groups under MDC 21 (Injuries, Poisonings and Toxic Effects of Drugs), not under the musculoskeletal MDC that some code references list. The CMS grouper assigns it to MS-DRG 913 (traumatic injury with MCC) or MS-DRG 914 (traumatic injury without MCC).

The code also appears in MS-DRGs 963, 964, and 965, titled other multiple significant trauma. Those three sit in MDC 24 and apply when the stay involves several qualifying injuries rather than one toe.

Actual DRG assignment depends on the principal diagnosis, the presence of complications or comorbidities (CCs), major complications or comorbidities (MCCs), and the procedure codes billed. For hospital inpatient claims, coders should verify the specific DRG number through the current CMS DRG grouper rather than relying on a single-code lookup.

For outpatient and physician claims, DRG does not directly apply. Medical necessity edits, LCD (Local Coverage Determination) requirements, and prior authorization rules still govern coverage for surgical amputation procedures.

Review the relevant payer’s LCD for foot and ankle surgery before submitting. The medical claims clearinghouse process handles payer-specific edit checks before a claim reaches the insurer.

Coding guidelines and documentation tips

Accurate documentation from the treating provider is the foundation of correct S98.141A coding. These are the details most often missing from notes that lead to downcoding or denial on traumatic lesser toe amputation claims.

• Laterality: The provider note must explicitly state “right” or name the involved toe. Without documented laterality, the coder defaults to S98.149A (unspecified), which some payers flag for additional documentation requests.
• Partial vs. complete: Notes must say whether the digit was fully severed. Silence is not neutral here – the S98 Applicable To note pushes an unspecified amputation to the complete code, S98.131A.
• Number of toes: S98.141A covers one lesser toe only. Two or more lesser toes on the right foot move the claim to the S98.22 subcategory.
• Joint level: Do not query the provider for a joint level to support the ICD-10-CM code, because no S98 code records one. Do capture it for the CPT selection.
• Encounter type for 7th character: Active treatment visits use 7th character A, including the ED, the OR, and a first debridement. Wound checks, suture removal, and rehabilitation after active treatment use 7th character D.
• External cause codes: Chapter 19 injuries should be accompanied by external cause codes from the V00-Y99 range to document the mechanism and place of injury.

A well-structured superbill that captures laterality, severity, and encounter type at the point of service reduces coding queries and speeds up claim submission. For practices using associated procedure codes alongside ICD-10 diagnoses, documentation accuracy at intake is the single biggest controllable variable in claim approval rates.

How Pabau supports accurate ICD-10 coding

Most podiatry and surgical billing teams still check code specificity by hand. Someone opens a code lookup in one tab, the patient record in another, and retypes the diagnosis into a claim form. Every hop is a chance to carry over a stale description, such as the joint level that S98.141A never had.

Practice management software like Pabau keeps the diagnosis, the procedure, and the claim in one record. Codes are entered against the visit that generated them, so the claim inherits what the clinician documented rather than what a coder remembered later.

Pabau’s Claim.MD clearinghouse integration validates ICD-10 and CPT code pairings against payer edits before submission. That reduces the risk of denial on traumatic amputation claims. The platform supports CMS-1500 and 837P claim formats and reaches thousands of US payers.

Claim statuses and electronic remittance advice come back into the same record. Your team can see which S98 claims paid and which need rework without leaving the patient file.

Streamline ICD-10 code submission with Pabau

Pabau’s claims management tools help billing teams submit accurate ICD-10 codes, validate CPT pairings, and track claim status – all within a single platform. See how it works for podiatry and surgical billing teams.

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Conclusion

S98.141A records a partial traumatic amputation of one right lesser toe during the active treatment phase. It carries the toe group, the laterality, the severity, and the encounter type. It carries no joint level. A coder who goes looking for a PIP reference in the code title is chasing a description ICD-10-CM never published.

Document partial versus complete, name the toe and the side, and let the operative note drive the CPT choice. Pabau’s claims management software connects to the Claim.MD clearinghouse to validate those pairings and catch edit failures before submission. To see how Pabau handles ICD-10 coding workflows for podiatry and surgical practices, book a demo.

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