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T17.998A ICD-10-CM Code: Other foreign object in respiratory tract, part unspecified causing other injury, initial encounter

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FY 2026 Apr update / Injury, poisoning and certain other consequences of external causes (S00-T88) / Effects of foreign body entering through natural orifice (T15-T19)

T17.998A

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

Other foreign object in respiratory tract, part unspecified causing other injury, initial encounter

Other foreign object in respiratory tract, part unspecified causing other injury, initial encounter

CMS-HCC V28

0

0

RAF 0

CMS-HCC V24

0

0

RAF 0

ACA/HHS

0

0

RAF 0

ESRD/PACE

0

0

RAF 0

RXHCC

0

0

RAF 0

Code Trumping

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Code Book Path

Official
T17.99Other foreign object in respiratory tract, part unspecified
T17.998Other foreign object in respiratory tract, part unspecified causing other injury
T17.998AOther foreign object in respiratory tract, part unspecified causing other injury, initial encounter

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for T17.998A in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for T17.998A in this effective period.

Related Child Codes

Official
T17.998DOther foreign object in respiratory tract, part unspecified causing other injury, subsequent encounter
T17.998SOther foreign object in respiratory tract, part unspecified causing other injury, sequela

Includes

Official

ICD-10-CM does not list Includes notes for T17.998A in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for T17.998A in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for T17.998A in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for T17.998A in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for T17.998A in this effective period.

Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.

Is T17.998A an HCC code?

No. T17.998A is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

T17.998A is the ICD-10-CM diagnosis code for other foreign object in respiratory tract, part unspecified causing other injury, initial encounter. T17.998A sits in the ICD-10-CM chapter for injury, poisoning and certain other consequences of external causes (s00-t88), within the section covering effects of foreign body entering through natural orifice (t15-t19).

T17.998A is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

T17.998A is a billable ICD-10-CM code that can be reported on claims but does not currently contribute to a Medicare Advantage member's RAF score under any CMS risk adjustment model (V28, V24, ESRD, or RxHCC). Coders reviewing T17.998A should check whether additional documentation would support a more specific child code in the same hierarchy that does map to a payment HCC, capturing the correct specificity is the highest-impact RAF improvement available within accurate coding.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for T17.998A sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Child Codes

Code Hierarchy

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