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M77.4 Metatarsalgia – Causes & Treatment
M77.4 is the ICD-10 code for metatarsalgia – pain in the forefoot region. Learn about causes, symptoms, diagnosis, and treatment options.
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M77.4 is the ICD-10 code for metatarsalgia – pain in the forefoot region. Learn about causes, symptoms, diagnosis, and treatment options.
What Does ICD-10 Code M77.4 Mean?
The ICD-10 code M77.4 refers to metatarsalgia – a medical term for pain in the forefoot, specifically in the area of the metatarsal bones (the long bones in the middle of the foot). This pain typically occurs during standing, walking, or physical activity and can significantly affect daily life.
Causes
Metatarsalgia can be triggered by a variety of factors:
- Foot deformities (e.g., flat foot, splayfoot, high arch)
- Overuse from prolonged standing, intensive exercise, or poorly fitting footwear
- Excess body weight, which increases pressure on the forefoot
- Morton's neuroma – a thickening of nerve tissue between the metatarsal bones
- Arthritis or inflammatory joint conditions
- Hammer toe or hallux valgus (bunion), which alter pressure distribution across the forefoot
- Stress fractures of the metatarsal bones
Symptoms
Typical symptoms of metatarsalgia include:
- Dull or sharp pain around the toe joints at the base of the toes
- Pain that worsens with walking, running, or prolonged standing
- Numbness or tingling in the toes
- The sensation of walking on a pebble or a lump
- Altered gait or limping to relieve pain
Diagnosis
The diagnosis of M77.4 is usually established through a combination of:
- Medical history (questions about symptoms, occupation, footwear, physical activity)
- Physical examination (pressure pain, gait analysis)
- Imaging (X-ray to rule out fractures or arthritis; MRI if Morton's neuroma is suspected)
- Podiatric assessment (foot pressure measurement / pedobarography)
Treatment
Conservative Measures
In most cases, conservative treatment is effective:
- Orthopedic insoles to redistribute pressure away from the forefoot
- Footwear modification – shoes with sufficient toe room and adequate cushioning
- Physiotherapy to strengthen foot muscles and correct biomechanical imbalances
- Pain management with non-steroidal anti-inflammatory drugs (NSAIDs, e.g., ibuprofen)
- Rest and activity reduction during acute flare-ups
- Weight loss to reduce load on the foot
Invasive and Surgical Measures
If conservative treatment is insufficient, the following options may be considered:
- Corticosteroid injections for local anti-inflammatory effect
- Surgical correction of foot deformities (e.g., for hallux valgus or severe splayfoot)
- Neurectomy (surgical removal of Morton's neuroma)
References
- World Health Organization (WHO): International Classification of Diseases, 10th Revision (ICD-10), Code M77.4 – Metatarsalgia. URL: https://icd.who.int
- Espinosa, N., Brodsky, J.W., Maceira, E.: Metatarsalgia. In: Journal of the American Academy of Orthopaedic Surgeons, Vol. 18, No. 8, 2010, pp. 474–485.
- Coughlin, M.J., Saltzman, C.L., Anderson, R.B.: Mann's Surgery of the Foot and Ankle. 9th Edition. Elsevier Saunders, 2014.
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