ICD 10 Coding Alert

Question: In a patient, who has been on chemotherapy, our physician has documented ‘dry mouth’ as a diagnosis. How can we report this condition?

New Jersey Subscriber

Answer:  In ICD-9-CM, dry mouth is considered as a disturbance of salivary secretion. You report the ICD-9-CM code 527.7 (Disturbance of salivary secretion) for patients diagnosed with dry mouth condition.

ICD-10 changes: You’ll add another possibility to your coding options when ICD-10 becomes effective in October. The new system expands 527.7 into two codes: 

• K11.7 – Disturbances of salivary secretion

• R68.2 – Dry mouth, unspecified.

Documentation basics: Providers should base their diagnosis of xerostomia on evidence obtained from the patient’s history, an examination of the oral cavity and/or sialometry, a simple office procedure that measures the flow rate of saliva. Your physician may conclude the patient has this diagnosis if the patient complains of dry mouth, particularly at night, or of difficulty eating dry foods such as crackers.

Some payers will consider the administration of amifostine medically reasonable and necessary to reduce the incidence of moderate to severe xerostomia in patients undergoing radiation treatment for head and neck cancers.

Coder tips: In cases where radiation treatment causes xerostomia, you would report the appropriate head and neck cancer codes in addition to 527.7 and 709.9 (Unspecified disorder of skin and subcutaneous tissue) or K11.7 and L59.9 (Disorder of the skin and subcutaneous tissue related to radiation, unspecified) for ICD-10-CM. Check your payer policies to get the final word on which codes they require on the claim for payment.

What is dry mouth? Xerostomia, also called dry mouth, is a condition in which the salivary glands don’t produce enough saliva to keep the mouth wet. Dry mouth can cause difficulties in tasting, chewing, swallowing, and speaking, and may cause infections of the mouth.