Patient presents with complaints of lower back pain, consistent with a lower back muscle strain.  Onset of pain occurred [Date of onset] and is described as [Character of pain: e.g., aching, sharp, dull, throbbing] and localized to the [Location of pain: e.g., lumbar region, right paraspinal muscles, left lower back].  Pain is aggravated by [Aggravating factors: e.g., bending, lifting, twisting, prolonged sitting] and alleviated by [Alleviating factors: e.g., rest, ice, heat, over-the-counter pain relievers].  Patient denies any radiating pain, numbness, or tingling in the lower extremities.  No bowel or bladder incontinence reported.  Physical examination reveals [Physical exam findings: e.g., tenderness to palpation in the lumbar paraspinal muscles, decreased range of motion in lumbar flexion and extension, no neurological deficits].  Diagnosis of lumbar muscle strain is made based on patient history, physical examination findings, and absence of red flags suggesting a more serious condition such as disc herniation or spinal stenosis.  Treatment plan includes conservative management with rest, ice, over-the-counter pain relievers such as ibuprofen or naproxen, and gentle stretching exercises.  Patient education provided on proper body mechanics and lifting techniques.  Follow-up appointment scheduled in [Duration] to assess response to treatment and discuss potential referral to physical therapy if symptoms persist.  ICD-10 code: M62.838 (Other muscle strain of back).