ICD-10-CM 2027
ICD-10 code for Postnasal discharge
From the official ICD-10-CM alphabetic index entry “Discharge (from) › postnasal”. Page updated September 29, 2026.
About coding Postnasal discharge
The ICD-10-CM code for Postnasal discharge is R09.82 (Postnasal drip).
Within R09.8 (other specified symptoms and signs involving the circulatory and respiratory systems), R09.82 is specifically for Postnasal drip. Related codes cover nasal congestion (R09.81) and other specified symptoms and signs involving the circulatory and respiratory systems (R09.89).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC, relative weight 1.5921), DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC, relative weight 0.9322) and DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC, relative weight 0.6659), in MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Postnasal discharge ICD-10 codes
What is the ICD-10 code for Postnasal discharge?
- R09.82 — Postnasal drip.
Is R09.82 billable?
- Yes. R09.82 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R09.82 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R09.82 as a principal diagnosis.
Is R09.82 a CC or MCC?
- No. R09.82 is neither a CC nor an MCC under MS-DRG v44.0.