2027 ICD-10-CM Diagnosis Code S81.809DUnspecified open wound, unspecified lower leg, subsequent encounter

ICD-10-CM Codes›S00–T88›S80-S89›S81

ICD-10-CM S81.809D
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S81.809D is a billable ICD-10-CM diagnosis code for unspecified open wound, unspecified lower leg, subsequent encounter. The 7th character D marks it as a subsequent encounter code, used during routine care in the healing or recovery phase. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 949 through 950. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Open wounds to limbs, subsequent encounter.

Code Identity

ICD-10-CM Code
S81.809D
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified open wound, unspecified lower leg, subsequent encounter
Short Description
Unspecified open wound, unspecified lower leg, subs encntr
Parent Code
S81.809
Unspecified open wound, unspecified 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 CodeS81.809DUnspecified open wound, unspecified lower leg, subsequent encounter

Present on Admission (POA)Billing

S81.809D 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).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Fracture of head of fibula
  • Fracture of neck of fibula
  • Fracture of shaft of tibia and fibula
  • Fracture of tibial spine
  • Fracture of upper end of lower leg
  • Glass in lower leg
  • Glass in shin
  • Injury of anterior tibial artery
  • Injury of cutaneous sensory nerve of lower limb
  • Injury of popliteal artery
  • Injury of popliteal vein
  • Injury of tibial nerve
  • Multiple open wounds of lower leg
  • Multiple open wounds of lower limb
  • Open bimalleolar fracture
  • Open division, superior tibiofibular ligament
  • Open fracture ankle, bimalleolar, high fibular fracture
  • Open fracture ankle, bimalleolar, low fibular fracture
  • Open fracture ankle, lateral malleolus, high
  • Open fracture ankle, lateral malleolus, low
  • Open fracture ankle, trimalleolar, high fibular fracture
  • Open fracture ankle, trimalleolar, low fibular fracture
  • Open fracture distal tibia
  • Open fracture distal tibia, extra-articular
  • Open fracture distal tibia, intra-articular
  • Open fracture fibula, head
  • Open fracture fibula, neck
  • Open fracture intercondylar spine of tibia
  • Open fracture of distal fibula
  • Open fracture of distal tibia and distal fibula
  • Open fracture of fibula
  • Open fracture of lateral malleolus
  • Open fracture of lower leg
  • Open fracture of medial malleolus
  • Open fracture of shaft of fibula
  • Open fracture of shaft of tibia
  • Open fracture of tibia
  • Open fracture of tibia AND fibula
  • Open fracture of tibia and fibula, shaft
  • Open fracture of tibial condyle
  • Open fracture of tibial plateau
  • Open fracture of tibial tuberosity
  • Open fracture of upper end of fibula
  • Open fracture of upper end of lower leg
  • Open fracture of upper end of tibia
  • Open fracture proximal tibia, bicondylar
  • Open fracture proximal tibia, lateral condyle
  • Open fracture proximal tibia, medial condyle
  • Open injury cutaneous sensory nerve of lower limb
  • Open injury posterior tibial nerve
  • Open injury, anterior tibial artery
  • Open injury, popliteal artery
  • Open injury, popliteal vein
  • Open pilon fracture
  • Open trimalleolar fracture
  • Open wound of lower leg
  • Pilon fracture
  • Trimalleolar fracture

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 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to S81.809D: its own notes plus those printed at S81, block S80-S89, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From S81 Open wound of knee and lower leg applies to 108 codes
  • open fracture of knee and lower leg (S82.-)
  • traumatic amputation of lower leg (S88.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From S81 Open wound of knee and lower leg applies to 108 codes
  • open wound of ankle and foot (S91.-)
From Block S80-S89 Injuries to the knee and lower leg applies to 4,680 codes
  • burns and corrosions (T20-T32)
  • frostbite (T33-T34)
  • injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)
  • insect bite or sting, venomous (T63.4)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From S81 Open wound of knee and lower leg applies to 108 codes
  • any associated wound infection

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From S81 Open wound of knee and lower leg applies to 108 codes
  • The appropriate 7th character is to be added to each code from category S81
Values for category S81 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter this code
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name S81.809D, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming S81.809D: its condition is not part of those codes, and both may be reported when the patient has both.

  • S71 Open wound of hip and thigh
    open wound of knee and lower leg (S81.-) names S81.-, which includes this code

Code Also 3

These codes say S81.809D may also be needed to fully describe the condition. The note gives no sequencing direction.

  • S84 Injury of nerves at lower leg level
    any associated open wound (S81.-) names S81.-, which includes this code
  • S85 Injury of blood vessels at lower leg level
    any associated open wound (S81.-) names S81.-, which includes this code
  • S86 Injury of muscle, fascia and tendon at lower leg level
    any associated open wound (S81.-) names S81.-, which includes this code

Clinical ClassificationClinical

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

CCSR INJ049
Open wounds to limbs, subsequent encounter
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 S81.809D to ICD-9-CMHistory

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

ICD-9-CM
V58.89 Other specfied aftercare
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S81.809DOverview

What is the ICD-10 code for unspecified open wound, unspecified lower leg, subsequent encounter?

The ICD-10-CM code for unspecified open wound, unspecified lower leg, subsequent encounter is S81.809D (sometimes written as S81809D). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is S81.809D (Unspecified open wound, unspecified lower leg) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified open wound, unspecified lower leg, subsequent encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character D in S81.809D mean?

The final character D marks a subsequent encounter: use it for routine care while the unspecified open wound, unspecified lower leg is healing, after active treatment has ended.

What MS-DRG does S81.809D group to?

When unspecified open wound, unspecified lower leg, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 950, 949, with relative weights from 0.7661 to 1.1231 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S81.809D 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, unspecified lower leg, subsequent encounter on inpatient claims. The code appears in the Injuries to the knee and lower leg (S80-S89) range of the CMS exempt list.