2026 ICD-10-CM Diagnosis Code S81.801SUnspecified open wound, right lower leg, sequela

ICD-10-CM Codes›S00–T88›S80-S89›S81

ICD-10-CM S81.801S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S81.801S is a billable ICD-10-CM diagnosis code for unspecified open wound, right lower leg, 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
S81.801S
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified open wound, right lower leg, sequela
Short Description
Unspecified open wound, right lower leg, sequela
Same as the full description in the CMS dataset.
Parent Code
S81.801
Unspecified open wound, right lower leg

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS80-S89Injuries to the knee and lower leg
CategoryS81Open wound of knee and lower leg
This CodeS81.801SUnspecified open wound, right lower leg, sequela

Present on Admission (POA)Billing

S81.801S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Fracture of lateral condyle of right tibia
  • Fracture of medial condyle of right tibia
  • Fracture of proximal end of right fibula
  • Fracture of right lateral malleolus
  • Fracture of right medial malleolus
  • Fracture of shaft of right fibula
  • Fracture of shaft of right tibia
  • Fracture of tibial spine
  • Open bicondylar fracture of upper end of right tibia
  • Open fracture intercondylar spine of tibia
  • Open fracture of distal end of right fibula
  • Open fracture of distal end of right tibia
  • Open fracture of intercondylar spine of right tibia
  • Open fracture of lateral plateau of right tibia
  • Open fracture of medial malleolus
  • Open fracture of medial malleolus of right tibia
  • Open fracture of medial plateau of right tibia
  • Open fracture of proximal right fibula
  • Open fracture of right ankle
  • Open fracture of right fibula
  • Open fracture of right lateral malleolus of fibula
  • Open fracture of right lower leg
  • Open fracture of right tibia
  • Open fracture of right tibial plateau
  • Open fracture of shaft of fibula
  • Open fracture of shaft of right fibula
  • Open fracture of shaft of right tibia
  • Open fracture of shaft of tibia
  • Open fracture of tibial condyle
  • Open fracture of upper end of fibula
  • Open fracture of upper end of right tibia
  • Open fracture proximal tibia, medial condyle
  • Open wound of right lower leg

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Open wound of knee and lower leg (S81). 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 S81.801S to ICD-9-CMHistory

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

ICD-9-CM
906.1 Late eff open wnd extrem
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 S81.801SOverview

Is S81.801S (Unspecified open wound, right lower leg) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified open wound, right lower leg, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S81.801S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the unspecified open wound, right lower leg itself has resolved, not the original event.

What MS-DRG does S81.801S group to?

When unspecified open wound, right lower leg, 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 S81.801S 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 unspecified open wound, right lower leg, sequela on inpatient claims.

What is the ICD-9 equivalent of S81.801S?

Under the General Equivalence Mappings, unspecified open wound, right lower leg, sequela converts to ICD-9-CM 906.1 (late eff open wnd extrem). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.