Question

question 8

a patient with rheumatoid arthritis takes nonsteroidal anti-inflammatory drugs (nsaids) to manage pain. he also has regular blood tests to monitor kidney function due to his long-term use of nsaids. what diagnosis coding describes the need for the test when the results are normal (the patient has no symptoms of liver disease)?

z79.1, z51.81
z79.1, m06.9
m06.9
m06.9, z79.1, z51.81

Explanation:

Analyze the clinical scenario and coding guidelines

The patient has rheumatoid arthritis (M06.9) and takes NSAIDs long-term (Z79.1). He is undergoing regular blood tests to monitor kidney function (therapeutic drug monitoring, Z51.81). Since the test results are normal and there are no symptoms of kidney or liver disease, the primary reason for the encounter is the drug monitoring, followed by the condition requiring the medication and the long-term drug use code.

Determine the sequencing of ICD-10-CM codes

According to ICD-10-CM guidelines for therapeutic drug monitoring, the code for the encounter/monitoring is sequenced first:

1. Encounter for therapeutic drug monitoring: Z51.81 (Encounter for therapeutic drug level monitoring) is not the primary code here because the options sequence the underlying condition and long-term drug use. Let's evaluate the standard sequencing:

• The patient is seen for monitoring. The primary diagnosis for the encounter is the condition requiring the medication: Rheumatoid arthritis, unspecified (M06.9).
• The secondary codes are the long-term (current) use of nonsteroidal anti-inflammatory drugs (NSAIDs): Z79.1.
• The encounter for therapeutic drug monitoring code: Z51.81.

Thus, the correct sequence is M06.9, Z79.1, Z51.81.

Verify the options

• Option 1: Z79.1, Z51.81
• Option 2: Z79.1, M06.9
• Option 3: M06.9
• Option 4: M06.9, Z79.1, Z51.81

The fourth option correctly lists all three necessary codes in the appropriate clinical sequence.

Answer:

• (A) Z79.1, Z51.81
• (B) Z79.1, M06.9
• (C) M06.9
• (D) M06.9, Z79.1, Z51.81 (Correct answer)