Klebsiella pneumoniae is generally considered a typical bacterial cause of pneumonia in practical clinical classification. The term “atypical pneumonia” is more commonly linked to organisms such as Mycoplasma, Chlamydophila, or Legionella. Klebsiella can be associated with more severe presentations in certain settings, including lobar consolidation, heavy sputum burden, systemic toxicity, and higher complication risk—especially in patients with advanced age, comorbidities, or immunosuppression. Definitive classification depends on clinical assessment, imaging, and appropriate testing; the typical/atypical distinction is a pragmatic framework to guide empiric therapy and reassessment.