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S86.119A
ICD-10-CM
Calf Strain

Learn about calf strain diagnosis, including gastrocnemius strain and soleus strain, often referred to as tennis leg. This guide covers clinical documentation, medical coding, and healthcare best practices for accurate calf muscle tear diagnosis. Find information on symptoms, treatment, and ICD-10 codes related to calf strain injuries for precise medical records.

Also known as

Gastrocnemius Strain
Soleus Strain
Tennis Leg

Diagnosis Snapshot

Key Facts
  • Definition : Tear in calf muscle (gastrocnemius or soleus), often from sudden forceful contraction.
  • Clinical Signs : Sudden sharp pain, swelling, bruising, tenderness in the calf. Difficulty walking, especially on toes.
  • Common Settings : Sports involving running, jumping, or quick changes in direction (e.g., tennis, basketball).

Related ICD-10 Code Ranges

Complete code families applicable to AAPC S86.119A Coding
S86.0-S86.1

Injury of muscle, fascia and tendon of lower leg

Covers strains and tears of calf muscles like gastrocnemius and soleus.

S86.8-S86.9

Other injuries of muscle, fascia and tendon at lower leg level

Includes other specified and unspecified lower leg muscle injuries.

M62.838

Other muscle disorders of lower leg

May be used if not clearly a strain or tear but muscle dysfunction is present.

Code-Specific Guidance

Decision Tree for

Follow this step-by-step guide to choose the correct ICD-10 code.

Is the calf strain traumatic?

  • Yes

    Is there a tear of the gastrocnemius?

  • No

    Is it a strain of the gastrocnemius?

Code Comparison

Related Codes Comparison

When to use each related code

Description
Partial tear of calf muscle fibers.
Complete rupture of calf muscle.
Microscopic tear of the medial gastrocnemius at its musculotendinous junction

Documentation Best Practices

Documentation Checklist
  • Calf strain diagnosis: Document laterality (left or right).
  • Gastrocnemius/soleus strain: Specify muscle involved.
  • Tennis leg: Note mechanism of injury (e.g., forced dorsiflexion).
  • Document severity (mild, moderate, severe) and palpable defect.
  • Include pain location, onset, and aggravating/relieving factors.

Coding and Audit Risks

Common Risks
  • Laterality Coding

    Missing or incorrect laterality (right, left, bilateral) for calf strain impacts reimbursement and data accuracy. ICD-10-CM coding guidelines require laterality specification for accurate medical coding.

  • Specificity of Diagnosis

    Documenting 'calf strain' lacks specificity. CDI should query for gastrocnemius vs. soleus strain for accurate coding, impacting quality reporting and severity reflection.

  • Traumatic vs. Atraumatic

    Distinguishing traumatic (e.g., sports injury) vs. atraumatic calf strain is crucial. Documentation clarity helps assign appropriate ICD-10-CM codes for accurate etiology and injury classification.

Mitigation Tips

Best Practices
  • RICE therapy (Rest, Ice, Compression, Elevation)
  • Proper stretching before activity
  • Strengthen calf muscles with exercises
  • Avoid sudden changes in activity level
  • Wear supportive footwear

Clinical Decision Support

Checklist
  • 1. Palpate calf for tenderness (ICD-10 S86.1, S26.1)
  • 2. Evaluate ankle ROM and strength
  • 3. Assess for ecchymosis or edema
  • 4. Consider Thompson test for Achilles rupture r/o

Reimbursement and Quality Metrics

Impact Summary
  • Calf Strain (C) reimbursement impacts ICD-10 coding (S16.1xx, S16.2xx) for accurate claims processing.
  • Coding accuracy for Calf Strain diagnosis affects hospital case mix index (CMI) and resource allocation.
  • Proper Calf Strain diagnosis reporting impacts quality metrics related to musculoskeletal injury treatment outcomes.
  • Gastrocnemius/Soleus Strain documentation impacts physician performance reporting and pay-for-performance programs.

Streamline Your Medical Coding

Let S10.AI help you select the most accurate ICD-10 codes for . Our AI-powered assistant ensures compliance and reduces coding errors.

Frequently Asked Questions

Common Questions and Answers

Q: How can I differentiate between a gastrocnemius strain, a soleus strain, and Achilles tendinopathy in a patient presenting with posterior calf pain?

A: Differentiating between a gastrocnemius strain, a soleus strain, and Achilles tendinopathy requires a thorough clinical assessment. Palpation plays a key role: tenderness in the gastrocnemius muscle belly suggests a gastrocnemius strain, while tenderness lower down, closer to the musculotendinous junction, may point to a soleus strain. Pain with resisted plantarflexion with the knee extended suggests gastrocnemius involvement, whereas pain with resisted plantarflexion with the knee flexed isolates the soleus. Achilles tendinopathy typically presents with pain and thickening along the Achilles tendon itself, distinct from the muscle bellies. Consider incorporating Thompson test for Achilles tendon rupture in the differential diagnosis. Further imaging like ultrasound can be helpful to confirm the diagnosis and assess the severity of the strain or tendinopathy. Explore how dynamic ultrasound can be used in assessing muscle function during plantarflexion to aid in differential diagnosis.

Q: What are evidence-based best practices for managing a severe grade II calf muscle strain in athletes, including return-to-play criteria?

A: Managing a severe grade II calf muscle strain requires a multi-modal approach focused on minimizing pain and inflammation initially with the PRICE protocol (protection, rest, ice, compression, elevation). As pain subsides, progressive loading exercises are essential to restore muscle function and prevent re-injury. Eccentric strengthening exercises are particularly important in calf strain rehabilitation. Return-to-play criteria should be based on objective measures such as pain-free full range of motion, restoration of strength and power comparable to the uninjured side, and successful completion of sport-specific functional tests without pain. Consider implementing a phased return-to-play program beginning with low-intensity activities and gradually increasing intensity and duration. Close monitoring and communication with the athlete are crucial throughout the rehabilitation process. Learn more about specific eccentric exercises appropriate for different stages of calf strain rehabilitation.

Quick Tips

Practical Coding Tips
  • Code M72.821 for calf strain
  • Document laterality (left/right)
  • Specify gastrocnemius/soleus if known
  • Consider S86.0xx for tennis leg tear
  • Check documentation for complete tear

Documentation Templates

Patient presents with complaints consistent with calf strain, possibly involving the gastrocnemius or soleus muscle.  Onset of symptoms occurred [Date of onset] during [activity causing injury, e.g., running, jumping].  Patient reports [character of pain, e.g., sharp, dull, aching] pain in the [location of pain, e.g., medial, lateral, central] calf, with pain exacerbated by [movements/activities that exacerbate pain, e.g., plantarflexion, weight bearing].  Physical examination reveals [tenderness/edema/ecchymosis] in the [specific location of findings].  Palpation elicits pain at [specific anatomical location].  Range of motion is [limited/normal] with [description of limitations, if any].  Strength testing reveals [strength grading, e.g., 4/5, 5/5] plantarflexion.  Differential diagnosis includes Achilles tendon rupture, muscle contusion, and deep vein thrombosis (DVT).  Based on clinical presentation and examination findings, the diagnosis of calf strain is most likely.  Ankle x-ray was [ordered/performed, and results were negative/positive for fracture].  Ultrasound may be considered to evaluate the extent of the strain.  Initial treatment plan includes RICE therapy (rest, ice, compression, elevation), nonsteroidal anti-inflammatory drugs (NSAIDs) for pain management, and gradual return to activity as tolerated.  Patient education provided on proper stretching and strengthening exercises to prevent recurrence.  Follow-up scheduled in [duration] to assess progress and adjust treatment plan as needed.  ICD-10 code: [Appropriate ICD-10 code, e.g., S86.1XXA] is considered.
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