The MOST common cause of dehydration in pediatric patients is:

A previously healthy individual who presents with pneumonia due to Pneumocystis jiroveci should be tested for

A) myeloperoxidase deficiency. B) severe combined immunodeficiency. C) common variable immune deficiency. D) acquired immunodeficiency syndrome.

Many ICD-10-CM codes require an additional character called a(n) ____ to provide additional information about the patient's condition.

A. modifier B. 5th digit C. extension D. placeholder