M20-M25: Other joint disorders
M21: Other acquired deformities of limbs
The ICD-10 group denoted as M21 is referred to as "Other Acquired Deformities of Limbs" and includes several conditions characterized by abnormal shape or position of the limbs that occur after birth due to a variety of causes. These deformities can result from infections, injuries, underlying diseases, or other factors like poor posture or inappropriate footwear. The affected person may notice a visible change in the shape or alignment of the limb, which could be the leg, arm, hand or foot. Symptoms might also include discomfort, pain, or difficulty in moving the affected limb. Depending on the severity and type of deformity, the disease progression may vary and impact the musculoskeletal system, potentially affecting the individual's mobility and quality of life. This group of conditions does not transmit from person to person as they occur due to acquired, not genetic or contagious, factors.
Subcodes of M21:
- M21.0: Valgus deformity, not elsewhere classified
- M21.1: Varus deformity, not elsewhere classified
- M21.2: Flexion deformity
- M21.3: Wrist or foot drop (acquired)
- M21.4: Flat foot [pes planus] (acquired)
- M21.5: Acquired clawhand, clubhand, clawfoot and clubfoot
- M21.6: Other acquired deformities of ankle and foot
- M21.7: Unequal limb length (acquired)
- M21.8: Other specified acquired deformities of limbs
- M21.9: Acquired deformity of limb, unspecified
Patient Disclaimer
The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.