Left Shoulder Pain ICD-10 Codes Guide 2026

 Left shoulder pain is a common musculoskeletal complaint seen in primary care, orthopedics, physiotherapy, and emergency settings. Accurate ICD-10 coding is essential for proper documentation, insurance claims, and medical billing compliance.

This guide explains the ICD-10 codes for left shoulder pain, when to use them, related conditions, and coding tips for medical billing professionals.

What is Left Shoulder Pain?

Left shoulder pain refers to discomfort, stiffness, or aching in the left shoulder joint or surrounding tissues. It may result from:

• Muscle strain or overuse
• Rotator cuff injuries
• Arthritis
• Frozen shoulder (adhesive capsulitis)
• Trauma or falls
• Referred pain from neck or chest conditions

Correct identification of the underlying cause is important for selecting the appropriate ICD-10 code.

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Primary ICD-10 Code for Left Shoulder Pain

✔ M25.512 – Pain in Left Shoulder

$M25.512$

This is the main ICD-10 code used for left shoulder pain when no specific diagnosis (like fracture or rotator cuff tear) is confirmed.

When to use M25.512:

• General complaint of left shoulder pain
• Pain without a confirmed underlying diagnosis
• Initial visits before diagnostic imaging results

Clinical note:

This code is commonly used in outpatient visits, urgent care, and physical therapy settings.

Related ICD-10 Codes for Shoulder Pain Conditions

Depending on diagnosis, other codes may be more appropriate:

1. M25.511 – Pain in Right Shoulder

Used when pain is on the right side instead of left.

2. M75.102 – Unspecified Rotator Cuff Tear, Left Shoulder

Used when imaging confirms rotator cuff injury.

3. M75.02 – Adhesive Capsulitis of Left Shoulder

Also known as frozen shoulder.

4. S46.012A – Strain of Muscle/Tendon of Left Rotator Cuff (Initial Encounter)

Used for traumatic or acute injuries.

5. M19.012 – Primary Osteoarthritis, Left Shoulder

Used for degenerative joint disease.

ICD-10 Coding Guidelines for Left Shoulder Pain

To ensure accurate billing and reduce claim denials, follow these guidelines:

1. Use Specific Diagnosis When Available

Avoid using M25.512 if a confirmed condition exists (e.g., tear, arthritis).

2. Document Laterality Clearly

Always specify:

• Left shoulder
• Right shoulder
• Bilateral involvement (if applicable)

3. Link Symptoms to Diagnosis

If shoulder pain is a symptom of another condition, code the underlying disease first.

4. Use External Cause Codes When Needed

For injuries (falls, accidents), include external cause codes when required by payer rules.

Common Causes of Left Shoulder Pain (For Coding Context)

Understanding the cause helps improve coding accuracy:

• Rotator cuff injuries
• Tendonitis or bursitis
• Shoulder dislocation
• Cervical radiculopathy (neck-related pain)
• Sports injuries
• Repetitive strain injuries

ICD-10 Coding Mistakes to Avoid

Many billing denials happen due to simple coding errors:

❌ Using unspecified codes when diagnosis is known
❌ Missing laterality (left/right)
❌ Not updating codes after diagnostic confirmation
❌ Incorrect sequencing of primary vs secondary diagnosis
❌ Lack of proper clinical documentation

Billing Importance of Accurate Shoulder Pain Coding

Accurate ICD-10 coding for left shoulder pain is important for:

• Faster insurance reimbursement
• Reduced claim denials
• Proper medical record documentation
• Compliance with payer policies
• Efficient revenue cycle management

Conclusion

The primary ICD-10 code for left shoulder pain is M25.512, used when no specific diagnosis is confirmed. However, more specific codes should always be used when a definitive condition is diagnosed.

Correct ICD-10 coding not only improves medical documentation but also ensures smoother insurance claims processing and better reimbursement outcomes.