2026 ICD-10-CM Diagnosis Code S80.249SExternal constriction, unspecified knee, sequela

ICD-10-CM Codes›S00–T88›S80-S89›S80

ICD-10-CM S80.249S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S80.249S is a billable ICD-10-CM diagnosis code for external constriction, unspecified knee, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 604 through 605. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S80.249S
Billable Status
Yes — Valid for Submission
Code Describes
External constriction, unspecified knee, sequela
Short Description
External constriction, unspecified knee, sequela
Same as the full description in the CMS dataset.
Parent Code
S80.249
External constriction, unspecified knee

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS80-S89Injuries to the knee and lower leg
CategoryS80Superficial injury of knee and lower leg
This CodeS80.249SExternal constriction, unspecified knee, sequela

Present on Admission (POA)Billing

S80.249S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Injuries to the knee and lower leg (S80-S89).

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Superficial injury of knee and lower leg (S80). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ073
Injury, sequela
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Wounds and Injuries

An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S80.249S to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
906.2 Late eff superficial inj
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S80.249SOverview

What is the ICD-10 code for external constriction, unspecified knee, sequela?

The ICD-10-CM code for external constriction, unspecified knee, sequela is S80.249S (sometimes written as S80249S). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is S80.249S (External constriction, unspecified knee) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report external constriction, unspecified knee, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S80.249S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the external constriction, unspecified knee itself has resolved, not the original event.

What MS-DRG does S80.249S group to?

When external constriction, unspecified knee, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 604, 605, with relative weights from 0.9160 to 1.4721 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S80.249S exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for external constriction, unspecified knee, sequela on inpatient claims. The code appears in the Injuries to the knee and lower leg (S80-S89) range of the CMS exempt list.