Specific code 2014 ICD-9-CM Diagnosis Code 784.91
Postnasal drip
  • Billable Code
  • ICD-9-CM 784.91 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 784.91 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Posterior rhinorrhea
Clinical Information
  • A disorder characterized by excessive mucous secretion in the back of the nasal cavity or throat, causing sore throat and/or coughing.
  • Excessive mucous secretion in the back of the nasal cavity or throat, causing sore throat and/or coughing. It is usually due to allergic rhinitis or a cold.
Convert to ICD-10-CM: 784.91 converts directly to:
  • 2014 ICD-10-CM R09.82 Postnasal drip
ICD-9-CM Volume 2 Index entries containing back-references to 784.91:
  • Drip, postnasal (chronic) 784.91
    • due to:
      • allergic rhinitis - see Rhinitis, allergic
      • common cold 460
      • gastroesophageal reflux - see Reflux, gastroesophageal
      • nasopharyngitis - see Nasopharyngitis
      • other known condition - code to condition
      • sinusitis - see Sinusitis
  • Postnasal drip 784.91
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 784.91 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.