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M76.7 – Achilles Tendinopathy: Causes & Treatment

M76.7 is the ICD-10 code for Achilles tendinopathy, a painful overuse condition of the Achilles tendon that commonly affects athletes and physically active individuals.

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Things worth knowing about "M76.7"

M76.7 is the ICD-10 code for Achilles tendinopathy, a painful overuse condition of the Achilles tendon that commonly affects athletes and physically active individuals.

What Does the ICD-10 Code M76.7 Mean?

The ICD-10 code M76.7 refers to Achilles tendinopathy (also known as Achilles tendinitis or Achilles tendon syndrome). This condition affects the Achilles tendon – the largest tendon in the human body, connecting the calf muscles to the heel bone (calcaneus). It is characterized by pain, swelling, and reduced load-bearing capacity of the tendon, and is one of the most common musculoskeletal complaints among active individuals.

Causes

Achilles tendinopathy typically develops due to chronic overuse or repetitive microtrauma to the tendon. Common causes include:

Sports overuse: running, jumping, or a sudden increase in training intensity
Inappropriate footwear: insufficient cushioning or support
Foot misalignment: e.g., overpronation (inward rolling of the foot)
Tight calf muscles: increased tension on the tendon
Age-related degeneration: loss of tendon elasticity from middle age onward
Medications: fluoroquinolone antibiotics can damage tendon tissue

Symptoms

Typical symptoms of M76.7 include:

Pain along the Achilles tendon, especially in the morning after getting up
Swelling and thickening in the area of the tendon
Stiffness and pain at the beginning of physical activity
Tenderness and pain on movement just above the heel bone
In severe cases: pain at rest or during the night

Diagnosis

Diagnosis of Achilles tendinopathy is typically made through:

Clinical examination: palpation, range of motion testing, and pain localization
Ultrasound (sonography): visualization of tendon changes, thickening, or partial tears
MRI (magnetic resonance imaging): in unclear cases or suspected tendon rupture
X-ray: to rule out bony changes or calcifications

Treatment

Conservative Treatment

In most cases, M76.7 is treated conservatively:

Rest and load reduction: temporary relief of stress on the affected tendon
Physiotherapy: eccentric calf strengthening exercises are considered the gold standard
Orthopedic insoles: heel wedges to reduce tension on the tendon
Pain and anti-inflammatory medication: short-term use of NSAIDs (non-steroidal anti-inflammatory drugs)
Extracorporeal shockwave therapy (ESWT): effective in chronic cases
Cold therapy: to reduce swelling and pain

Surgical Treatment

In severe or treatment-resistant cases, surgery may be required. Procedures typically involve removing degeneratively altered tendon tissue or reconstructing partial tears.

Prognosis

With consistent treatment and adequate recovery time, Achilles tendinopathy heals well in most cases. Treatment duration is often several weeks to months. Early intervention significantly improves outcomes and helps prevent the condition from becoming chronic.

References

World Health Organization – ICD-10 International Classification of Diseases, 10th Revision, Code M76.7.
Alfredson H, Lorentzon R. – Chronic Achilles tendinosis: recommendations for treatment and prevention. Sports Medicine, 2000; 29(2):135–146.
Maffulli N, Wong J, Almekinders LC. – Types and epidemiology of tendinopathy. Clinics in Sports Medicine, 2003; 22(4):675–692.

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