ICD-10-CM Tabular Index · Chapter 19 · FY 2026 S80–S89
Injuries to the knee and lower leg (S80-S89) ICD-10-CM
The S80–S89 section covers injuries to the knee and lower leg with 5,585 ICD-10-CM diagnosis codes, of which 4,680 are billable in fiscal year 2026. The section is organized into the 10 code ranges listed below.
✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026
10
Code Ranges
5,585
Diagnosis Codes
4,680
Billable Codes
S80–S89
Code Range
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the S80–S89 Code Range
ICD-10-CM codes from S80 to S89 are used to classify a wide spectrum of injuries related to the knee and lower leg. These codes cover different types of physical trauma such as bruises, lacerations, fractures, dislocations, sprains, nerve injuries, blood vessel injuries, muscle and tendon damage, and traumatic amputations. Each injury is further detailed by location (right, left, or unspecified side), specific anatomical part, and encounter type (initial, subsequent, or sequela).
The codes in this range provide detailed identification for conditions including contusions and abrasions of the knee and lower leg, open wounds (like lacerations, punctures, and bites), and various fractures. For example, S80.00XA refers to an initial encounter for a "contusion of unspecified knee," commonly known simply as a bruise. Fracture codes (e.g., S82.001A) specify the fracture type (displaced, comminuted, transverse), bone involved (patella, tibia, fibula), and laterality, essential for precise documentation. Dislocations and sprains of the knee's ligaments (like the patella or cruciate ligaments) are assigned identifiers such as S83.001A for an initial encounter of an unspecified patella subluxation.
This classification also includes the coding of injuries to nerves (such as tibial or peroneal nerves), blood vessels (popliteal artery or vein, tibial arteries), muscles, fascia and tendons (like the Achilles tendon and other muscle groups), and crushing injuries. Detailed codes capture injury specifics and subsequent management stages to guide medical care and billing. The inclusion of synonyms like "subluxation," "hematoma," "sprain," or "rupture" for certain codes aids coders in mapping common clinical terms to precise codes, enhancing accuracy in diagnosis recording and treatment planning within this ICD-10 range.
Questions About This Page
How many codes are in the S80-S89 range?
The S80-S89 range contains 5,585 ICD-10-CM diagnosis codes in FY 2026. 4,680 of them are billable, and the rest are category headers that organize the section.
What conditions does S80-S89 cover?
The range covers injuries to the knee and lower leg. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
The appropriate 7th character is to be added to each code from category S80
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
any associated wound infection
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
The appropriate 7th character is to be added to each code from category S81
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
fracture of malleolus
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
periprosthetic fracture around internal prosthetic ankle joint M97.2
periprosthetic fracture around internal prosthetic implant of knee joint M97.1
7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
The appropriate 7th character is to be added to all codes from category S82
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
A - initial encounter for closed fracture
B - initial encounter for open fracture type I or II
initial encounter for open fracture NOS
C - initial encounter for open fracture type IIIA, IIIB, or IIIC
D - subsequent encounter for closed fracture with routine healing
E - subsequent encounter for open fracture type I or II with routine healing
F - subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing
G - subsequent encounter for closed fracture with delayed healing
H - subsequent encounter for open fracture type I or II with delayed healing
J - subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing
K - subsequent encounter for closed fracture with nonunion
M - subsequent encounter for open fracture type I or II with nonunion
N - subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
P - subsequent encounter for closed fracture with malunion
Q - subsequent encounter for open fracture type I or II with malunion
R - subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
S - sequela
A fracture not indicated as displaced or nondisplaced should be coded to displaced
A fracture not indicated as open or closed should be coded to closed
The open fracture designations are based on the Gustilo open fracture classification
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
avulsion of joint or ligament of knee
laceration of cartilage, joint or ligament of knee
sprain of cartilage, joint or ligament of knee
traumatic hemarthrosis of joint or ligament of knee
traumatic rupture of joint or ligament of knee
traumatic subluxation of joint or ligament of knee
traumatic tear of joint or ligament of knee
Code Also
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
any associated open wound
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
strain of muscle, fascia and tendon of lower leg S86
7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
The appropriate 7th character is to be added to each code from category S83
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
The appropriate 7th character is to be added to each code from category S84
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
injury of blood vessels at ankle and foot level S95
7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
The appropriate 7th character is to be added to each code from category S85
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
The appropriate 7th character is to be added to each code from category S86
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
code(s) for all associated injuries
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
The appropriate 7th character is to be added to each code from category S87
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
An amputation not identified as partial or complete should be coded to complete
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
The appropriate 7th character is to be added to each code from category S88
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
other and unspecified injuries of ankle and foot S99
7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
The appropriate 7th character is to be added to each code from subcategories S89.0S89.1S89.2S89.3
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
A - initial encounter for closed fracture
D - subsequent encounter for fracture with routine healing
G - subsequent encounter for fracture with delayed healing
K - subsequent encounter for fracture with nonunion
P - subsequent encounter for fracture with malunion
S - sequela
A fracture not indicated as open or closed should be coded to closed
