ICD-10-CM 2027
ICD-10 code for Ageusia
From the official ICD-10-CM alphabetic index entry “Ageusia”. Page updated September 29, 2026.
About coding Ageusia
The ICD-10-CM code for Ageusia is R43.2 (Parageusia).
Within R43 (disturbances of smell and taste), R43.2 is specifically for Parageusia. Related codes cover Anosmia (R43.0), Parosmia (R43.1), other disturbances of smell and taste (R43.8) and unspecified disturbances of smell and taste (R43.9).
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 091 (Other Disorders of Nervous System with MCC, relative weight 1.7046), DRG 092 (Other Disorders of Nervous System with CC, relative weight 1.0239) and DRG 093 (Other Disorders of Nervous System without CC/MCC, relative weight 0.7783), in MDC 01 (Diseases and Disorders of the Nervous System), 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 Ageusia ICD-10 codes
What is the ICD-10 code for Ageusia?
- R43.2 — Parageusia.
Is R43.2 billable?
- Yes. R43.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R43.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R43.2 as a principal diagnosis.
Is R43.2 a CC or MCC?
- No. R43.2 is neither a CC nor an MCC under MS-DRG v44.0.