ICD-10-CM Tabular Index · Chapter 13 · FY 2026 M20–M25
Other joint disorders (M20-M25) ICD-10-CM
The M20–M25 section covers other joint disorders with 963 ICD-10-CM diagnosis codes, of which 719 are billable in fiscal year 2026. The section is organized into the 6 code ranges listed below.
✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026
6
Code Ranges
963
Diagnosis Codes
719
Billable Codes
M20–M25
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 M20–M25 Code Range
ICD-10 codes M20-M25 identify a variety of acquired joint and limb deformities and disorders, covering deformities of fingers, toes, limbs, and other joints like the patella and knee. These codes are utilized to specify distinct conditions such as mallet finger, hallux valgus, and joint contractures, as well as less common joint disorders like wrist or foot drop.
The range encompasses acquired deformities of digits including mallet finger (M20.01), boutonniere deformity (M20.02), and swan-neck deformity (M20.03). It also covers foot conditions such as hallux valgus (M20.1) and hammer toe (M20.4). The codes for acquired deformities of limbs (M21) differentiate between valgus and varus deformities for various joints including elbows, hips, knees, and ankles. Internal derangements of the knee such as meniscus cysts, tears, and ligament disruptions (M23) are detailed with laterality and specificity. Additionally, other joint disorders (M24) include capsular issues, cartilage damage, and dislocations, while M25 addresses nonspecific joint symptoms like hemarthrosis, instability, pain, stiffness, and osteophytes across joints. This precise subdivision aids medical coders in selecting accurate codes for complex joint and limb disorders.
Questions About This Page
How many codes are in the M20-M25 range?
The M20-M25 range contains 963 ICD-10-CM diagnosis codes in FY 2026. 719 of them are billable, and the rest are category headers that organize the section.
What conditions does M20-M25 cover?
The range covers other joint disorders. 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 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 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.
congenital deformities and malformations of limbs Q65Q66Q68Q74
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.
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.
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.
current injury - see injury of knee and lower leg S80S89
recurrent dislocation or subluxation of joints M24.4
recurrent dislocation or subluxation of patella M22.0M22.1
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.
current injury - see injury of joint by body region
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.
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.
