M79.661 – Pain in right lower leg

M79.661 – Pain in right lower leg

ICD-10-CM M79.661 covers pain in the right lower leg. Find billing info, clinical details, related codes, synonyms, and FAQs in this guide.

By Audrey Liz Perez on Jul 16, 2025.

Fact Checked by Ericka Pingol.

Use Code

M79.661 - Pain in right lower leg

M79.661 is used to document pain localized to the right lower leg, encompassing the area from the knee to the ankle. This code is applicable when the pain is not attributed to a more specific condition and is essential for accurate diagnosis and treatment planning.

The M79.661 diagnosis code, pain in the right lower leg, is used when a patient experiences localized discomfort in the lower limb, including the right calf and shin area. It falls under the musculoskeletal system's broader category of soft tissue disorders. It is especially relevant when the right lower leg pain is not linked to a specific injury or fracture.

This code helps healthcare providers document symptoms accurately and initiate proper evaluation and treatment, whether due to overuse, chronic pain, or acute pain caused by strain, inflammation, or other unspecified soft tissue disorders.

Is the M79.661 billable?

Yes, M79.661 is a billable/specific ICD-10-CM code that can indicate a diagnosis for reimbursement purposes.

M79.661 clinical information

Pain in the right lower leg can result from various factors, including:

  • Injuries: Sprains, strains, fractures, or overuse injuries affecting the musculoskeletal system.
  • Inflammatory conditions: Conditions like tendinitis or bursitis involving connective tissue.
  • Vascular issues: Such as deep vein thrombosis or peripheral artery disease.
  • Neurological disorders: Including sciatica or nerve compression syndromes.
  • Soft tissue disorders: Classified under other soft tissue disorders or unspecified soft tissue disorders.

Symptoms may include acute or chronic pain of the right leg, swelling, tenderness, and limited mobility. Diagnosis often involves physical examination, imaging studies, and assessment of medical history. Treatment options range from pain relievers and physical therapy to surgical interventions, depending on the underlying cause.

M79.661 synonyms include

  • Bilateral calf pain
  • Bilateral lower leg pain
  • Pain in bilateral lower legs
  • Pain in bilateral calves
  • Pain in right calf
  • Right calf pain
  • Right lower leg pain

Other ICD-10 codes used for leg pain

Related ICDs

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