ICD-10-CM 2027
ICD-10 code for Anosmia
From the official ICD-10-CM alphabetic index entry “Anosmia”. Page updated September 29, 2026.
About coding Anosmia
The ICD-10-CM code for Anosmia is R43.0 (Anosmia). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R43.0.
Within R43 (disturbances of smell and taste), R43.0 is specifically for Anosmia. Related codes cover Parosmia (R43.1), Parageusia (R43.2), 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.
More specific Anosmia codes (official index)
Common questions about Anosmia ICD-10 codes
What is the ICD-10 code for Anosmia?
- R43.0 — Anosmia. More specific codes apply when the documentation supports them: F44.6, J39.8.
What is the ICD-10 code for hysterical anosmia?
- F44.6 — Conversion disorder with sensory symptom or deficit.
What is the ICD-10 code for postinfectional anosmia?
- J39.8 — Other specified diseases of upper respiratory tract.
Is R43.0 billable?
- Yes. R43.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R43.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R43.0 as a principal diagnosis.
Is R43.0 a CC or MCC?
- No. R43.0 is neither a CC nor an MCC under MS-DRG v44.0.