ICD 10 Coding Alert

Hint: Exposure to smoking may be relevant.

Pharyngitis may seem like a cut-and-dry coding situation, but sometimes you may find notes that leave you with more questions than answers.

Luckily, ICD-10-CM guidelines try to account for situations with conflicting diagnoses or ambiguous terminology. See how you can utilize the guidelines in the following scenarios.

Think ‘Causative Organism’ With Acute Pharyngitis

Example 1: The provider evaluates a patient complaining of a painful, scratchy sore throat and difficulty swallowing and arrives at a diagnosis of acute pharyngitis. Which diagnosis code(s) should you report?

Encounter specifics will dictate which diagnosis codes you should choose. The key to selecting the most accurate acute pharyngitis ICD-10-CM code is reviewing the medical record to get as much information as possible on the patient’s complaints and condition. This will enable you to make an informed decision on the exact type of pharyngitis the patient is suffering from.

When you see a diagnosis of acute pharyngitis, it’s important to look for the causative organism. Once you have scoured the patient’s medical record for more information, you will select one of the following ICD-10-CM codes:

• J02.0 (Streptococcal pharyngitis): Only use for patients with a confirmed bacterial infection in the throat caused by streptococci bacteria. Look for mention of streptococcal sore throat or septic pharyngitis in the documentation.
• J02.8 (Acute pharyngitis due to other specified organisms): This is your best option if the physician identifies some other bacteria or virus as the cause of the pharyngitis. Coding tip: Make sure to include a secondary code from the B95-B97 (Bacterial and viral infectious agents) section of ICD-10-CM to identify the causative organism.
• J02.9 (Acute pharyngitis, unspecified): Look to this code when the patient has a chief complaint of sore throat in the absence of a more definitive diagnosis. You should also use this code if your provider documents that the patient is afflicted with an acute case of suppurative pharyngitis, ulcerative pharyngitis, or gangrenous pharyngitis; or if the patient only mentions acute infective pharyngitis, acute pharyngitis, or acute sore throat and does not give the provider any further detail. “This diagnosis has to be relied on when the organism has not yet been identified, while the infectious agent is being cultured by the lab, which is often the case for initial visits for acute pharyngitis,” says Barbara J. Cobuzzi, MBA, CPC, COC, CPC-P, CPC-I, CENTC, CPCO, CMCS, of CRN Healthcare in Tinton Falls, New Jersey. Remember: Only turn to the unspecified code if the documentation does not provide enough information to assign a more specific code.

Although providers are encouraged to avoid unspecified diagnoses as much as possible, the organism will likely be unknown when the provider first sees the patient. They will typically send a swab out to be cultured during the initial visit, and the exact organism will be identified by the time the patient returns for follow-up visits.

Rely on the Excludes1 Instructions for J00

Example 2: The provider sees a patient and documents they have an acute sore throat and a cold. Do you code both conditions?

This is another example of why it’s vital that you pay close attention to ICD-10-CM instructions. In cases like this, you report only the cold with J00 (Acute nasopharyngitis [common cold]).

Coding tip: Pay attention to the type 1 Excludes note directing you to not code the following conditions, which typically accompany a cold, with J00:

• J02.- (Acute pharyngitis)
• J02.9 (Acute pharyngitis, unspecified)
• J09.X2 (Influenza due to identified novel influenza A virus with other respiratory manifestations)
• J10.1 (Influenza due to other identified influenza virus with other respiratory manifestations)
• J11.1 (Influenza due to unidentified influenza virus with other respiratory manifestations)
• J31.0 (Chronic rhinitis)

Acute sore throat not otherwise specified is reported with J02.9, which is mutually exclusive (Excludes1). Thus, you can report only one of the two conditions. Since the sore throat typically accompanies the cold, reporting the cold (J00) captures both conditions.

Understand the Anatomy Involved

Example 3: After a thorough history and exam, the physician documents that the patient has both nasopharyngitis and acute pharyngitis. Does the presence of multiple respiratory conditions require multiple codes?

You must do two things to overcome the challenges that arise when coding conditions related to the respiratory system. To steer clear of coding errors, you must have a solid understanding of the anatomy involved. The other key piece of the puzzle is remembering the note at the beginning of ICD-10-CM Chapter 10 telling you that “when a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site.”