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M54.5 Low Back Pain (Lumbago) – Causes & Treatment
M54.5 is the ICD-10 code for low back pain (lumbago). It describes pain in the lumbar region and is one of the most common diagnoses in general practice worldwide.
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M54.5 is the ICD-10 code for low back pain (lumbago). It describes pain in the lumbar region and is one of the most common diagnoses in general practice worldwide.
What Does the Diagnosis M54.5 Mean?
The ICD-10 code M54.5 stands for low back pain, also known medically as lumbago or lumbalgia. It describes pain in the area of the lumbar spine (lower back), which can occur acutely or chronically. M54.5 is one of the most frequently assigned diagnoses in general practices and emergency departments worldwide.
Causes
Low back pain can have many different causes. In most cases, it involves so-called non-specific low back pain, where no clear organic cause is identified. Common triggers include:
- Muscle tension or overuse
- Poor posture and physical inactivity
- Herniated or bulging intervertebral discs
- Wear and tear of the facet joints (spondylarthrosis)
- Osteoporosis (bone loss)
- Pregnancy
- Psychosocial factors such as stress or depressive disorders
Less commonly, specific causes are present, such as tumors, infections, or inflammatory conditions like ankylosing spondylitis.
Symptoms
The main feature of M54.5 is pain in the lower back, which can vary in intensity. Typical accompanying symptoms include:
- Stiffness in the lumbar spine region
- Increased pain with movement, bending, or prolonged sitting
- Muscle tension on one or both sides
- Radiation of pain into the buttocks, hip, or upper thigh (without nerve involvement)
If the pain radiates into the leg and is associated with numbness or tingling, nerve root irritation may be present, which is coded under a different ICD code (e.g., M54.4 – lumboischialgia).
Acute vs. Chronic Low Back Pain
A distinction is made between:
- Acute low back pain: Duration under 6 weeks, often sudden onset (e.g., after lifting or twisting), frequently self-limiting
- Subacute low back pain: Duration of 6 to 12 weeks
- Chronic low back pain: Duration over 12 weeks, requiring more intensive diagnostic workup and a multimodal treatment approach
Diagnosis
The diagnosis M54.5 is usually made clinically. The physician asks the patient about the character, duration, intensity, and accompanying symptoms of the pain and conducts a physical examination. Imaging techniques such as X-ray, MRI, or CT scan are only used when specific causes are suspected or when improvement does not occur.
So-called red flags (warning signs) must be ruled out, including:
- Fever or unintentional weight loss
- Numbness in the anal or genital area
- Bladder or bowel dysfunction
- History of trauma or known malignancy
Treatment
Treatment depends on the cause, duration, and severity of symptoms. For non-specific low back pain, the following approaches are considered evidence-based:
Conservative Measures
- Movement over bed rest: Physical activity is one of the most effective measures for low back pain
- Physiotherapy and targeted back exercises
- Heat application for muscle relaxation
- Manual therapy or osteopathy
Medication
- Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or diclofenac for acute pain
- Muscle relaxants for severe tension (short-term use)
- For chronic cases: low-dose antidepressants or stepwise pain management as appropriate
Multimodal Pain Management
For chronic low back pain, guidelines recommend a multimodal treatment approach that combines medical, physiotherapeutic, and psychological strategies. This includes cognitive behavioral therapy, relaxation techniques, and patient education.
Prognosis
Most cases of acute low back pain (M54.5) improve within a few weeks without specific treatment. However, approximately 10 to 15 percent of affected individuals develop chronic symptoms. Early exercise therapy and avoidance of psychosocial stress can significantly reduce the risk of chronification.
References
- Maher C, Underwood M, Buchbinder R. Non-specific low back pain. The Lancet. 2017;389(10070):736-747. DOI: 10.1016/S0140-6736(16)30970-9
- World Health Organization (WHO). Musculoskeletal conditions. WHO Fact Sheet, 2023. Available at: www.who.int/news-room/fact-sheets/detail/musculoskeletal-conditions
- Qaseem A et al. Noninvasive Treatments for Acute, Subacute, and Chronic Low Back Pain: A Clinical Practice Guideline from the American College of Physicians. Annals of Internal Medicine. 2017;166(7):514-530. DOI: 10.7326/M16-2367
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