Pneumonia/Pleuritis – 2%: Infections like pneumonia or inflammation from the lining around the lungs (pleuritis) may be involved with chest pain. The default ICD ten code for chest pain is R07.9 (Chest pain, https://nelsoneyhr742982.bleepblogs.com/30302854/helping-the-others-realize-the-advantages-of-blood-vessel-pop