What is the most common type of renal stone composed of?

a. Struvite
b. Cystine
c. Calcium
d. Uric acid

ANS: C
The most common stone types are calcium oxalate or phosphate (70-80%). Struvite (magnesi-um-ammonium-phosphate) occurs 15% of the time. Cystine stoes are rare (less than 1%). Uric acid stones occur 7% of the time.

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The second character of an ICD-10 code is always:

a. alpha. b. numeric. c. alphanumeric. d. None of the above

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The abbreviation H&P stands for:

A) hemoglobin and hematocrit B) herniated nucleus pulposus C) history and physical D) history of pain

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