What is ICD-10 code S98.311S?

S98.311S is the ICD-10-CM diagnosis code for Complete traumatic amputation of right midfoot, sequela. It belongs to the ICD-10-CM chapter for injury, poisoning and certain other consequences of external causes (s00-t88). S98.311S is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. S98.311S is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Is S98.311S billable?

Yes. S98.311S is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. S98.311S is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Which HCC does S98.311S map to under V28?

S98.311S has no payable CMS-HCC V28 mapping in the final FY2026 CMS file.

What RAF reference is published for S98.311S?

S98.311S has no V28 reference coefficient because the final FY2026 source verifies no payable V28 mapping.

What is the V28 vs V24 difference for S98.311S?

S98.311S has verified no payable V28 mapping in the final FY2026 source. Select a historical effective period before making any V24 comparison.

What documentation supports S98.311S?

S98.311S is not a CMS-HCC V28 payment code in the verified current source, so MEAT is not the payment hook. Documentation still has to support the diagnosis if you report it.

2026 ICD-10-CM S98.311S: Complete traumatic amputation

S98.311S is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools

ICD-10-CM Code View

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Code lookupS98.311SEffective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Injury, poisoning and certain other consequences of external causes (S00-T88) / Injuries to the ankle and foot (S90-S99)

S98.311S

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Complete traumatic amputation of right midfoot, sequela

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

Mapped

HCC 189

Amputation Status/Lower Limb/...

Code-level coefficient reference

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

S98.31Complete traumatic amputation of midfoot

S98.311Complete traumatic amputation of right midfoot

S98.311SComplete traumatic amputation of right midfoot, sequela

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for S98.311S in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for S98.311S in this effective period.

Related Child Codes

Official

S98.311AComplete traumatic amputation of right midfoot, initial encounter

S98.311DComplete traumatic amputation of right midfoot, subsequent encounter

Includes

Official

ICD-10-CM does not list Includes notes for S98.311S in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for S98.311S in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for S98.311S in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for S98.311S in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for S98.311S in this effective period.

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is S98.311S an HCC code?

S98.311S is not in the CMS-HCC V28 or V24 community payment model. S98.311S has a separate mapping under the CMS-HCC ESRD model (HCC 189 (Amputation Status/Lower Limb/Amputation Complications)); the applicable result needs member context.

Code: S98.311S
Description: Complete traumatic amputation of right midfoot, sequela
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: Yes
Payment year: 2026

HCC Category Mapping

ESRDHCC 189, Amputation Status/Lower Limb/Amputation Complications

Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work S98.311S in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT Criteria for S98.311S

For S98.311S to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.

MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
EEvaluate: test results, medication response, or physical findings reviewed by the provider
AAssess: explicit mention in the assessment or plan with acknowledgment of status
TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed S98.311S during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

S98.311S is the ICD-10-CM diagnosis code for complete traumatic amputation of right midfoot, sequela. S98.311S sits in the ICD-10-CM chapter for injury, poisoning and certain other consequences of external causes (s00-t88), within the section covering injuries to the ankle and foot (s90-s99).

S98.311S has no mapping under the CMS-HCC V28 or V24 community payment models. S98.311S has a separate mapping under the CMS-HCC ESRD model (HCC 189 (Amputation Status/Lower Limb/Amputation Complications)); the applicable result needs member context. Do not assign V28 risk adjustment value from this page; verify the applicable model and payment year before using this code for risk adjustment.

S98.311S is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models. It does map under the CMS-HCC ESRD model, and that result depends on member context rather than on the V28 community model. Do not assign risk adjustment value from this page when no source-backed mapping is shown. Coders should check the current model files and select only the specificity supported by the provider documentation.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for S98.311S sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.